A new method was proposed for preparing AZ31/1060 composite plates with a corrugated interface,which involved cold-pressing a corrugated surface on the Al plate and then hot-pressing the assembled Mg/Al plate.The resu...A new method was proposed for preparing AZ31/1060 composite plates with a corrugated interface,which involved cold-pressing a corrugated surface on the Al plate and then hot-pressing the assembled Mg/Al plate.The results show that cold-pressing produces intense plastic deformation near the corrugated surface of the Al plate,which promotes dynamic recrystallization of the Al substrate near the interface during the subsequent hot-pressing.In addition,the initial corrugation on the surface of the Al plate also changes the local stress state near the interface during hot pressing,which has a large effect on the texture components of the substrates near the corrugated interface.The construction of the corrugated interface can greatly enhance the shear strength by 2−4 times due to the increased contact area and the strong“mechanical gearing”effect.Moreover,the mechanical properties are largely depended on the orientation relationship between corrugated direction and loading direction.展开更多
The infinite-layer nickelates,proposed as analogs to superconducting cuprates,provide a promising platform for exploring the mechanisms of unconventional superconductivity.However,the superconductivity has been exclus...The infinite-layer nickelates,proposed as analogs to superconducting cuprates,provide a promising platform for exploring the mechanisms of unconventional superconductivity.However,the superconductivity has been exclusively observed in thin films under atmospheric pressure,underscoring the critical role of the heterointerface.展开更多
The effects of the reduction rate of the corrugated rolling on the microstructure and mechanical properties of TA1/TC4 composite plate that was prepared via corrugated rolling+flat rolling process were investigated.Th...The effects of the reduction rate of the corrugated rolling on the microstructure and mechanical properties of TA1/TC4 composite plate that was prepared via corrugated rolling+flat rolling process were investigated.The finite element model was developed and validated for the corrugated rolling process of the composite plate.Experimental findings reveal the absence of significant defects and intermetallic compounds at the bonding interface.When the rolling temperature is 700℃with the reduction rate of 44%in the first pass of corrugated rolling,the tensile and interfacial shear strengths of the composite plate reach 749 and 403.97 MPa,respectively.The simulation results demonstrate that the plastic strain in the TC4 substrate is enhanced by corrugated rolling and the compressive stress at the trough is high.These results confirm that interfacial bonding is promoted by corrugated rolling,and the mechanical properties of the composite plate are improved significantly with the increase of reduction rate.展开更多
Research efforts on electromagnetic interference(EMI)shielding materials have begun to converge on green and sustainable biomass materials.These materials offer numerous advantages such as being lightweight,porous,and...Research efforts on electromagnetic interference(EMI)shielding materials have begun to converge on green and sustainable biomass materials.These materials offer numerous advantages such as being lightweight,porous,and hierarchical.Due to their porous nature,interfacial compatibility,and electrical conductivity,biomass materials hold significant potential as EMI shielding materials.Despite concerted efforts on the EMI shielding of biomass materials have been reported,this research area is still relatively new compared to traditional EMI shielding materials.In particular,a more comprehensive study and summary of the factors influencing biomass EMI shielding materials including the pore structure adjustment,preparation process,and micro-control would be valuable.The preparation methods and characteristics of wood,bamboo,cellulose and lignin in EMI shielding field are critically discussed in this paper,and similar biomass EMI materials are summarized and analyzed.The composite methods and fillers of various biomass materials were reviewed.this paper also highlights the mechanism of EMI shielding as well as existing prospects and challenges for development trends in this field.展开更多
The lamellar layer of intermetallic compounds(IMCs)was adversely affected the performance of welding-brazing joints in Al/steel dissimilar metals.In this study,a short fiber-like surface morphology was fabricated on t...The lamellar layer of intermetallic compounds(IMCs)was adversely affected the performance of welding-brazing joints in Al/steel dissimilar metals.In this study,a short fiber-like surface morphology was fabricated on the butt surface of Q235 steel via laser.The interaction behavior between the short fibers and the molten pool was captured using a high-speed camera.Laser-arc hybrid welding-brazing was then employed to join Al(6061-T6)to the steel.This process successfully created a short fiber-like interface structure at the joint.The relationship between microstructure and mechanical properties was investigated,compared with Al/bare steel(ABS)joint.The research results indicated that the IMCs layer consisted of FeAl_(3)and Fe_(2)Al_(5).The interface strength of the Al/short fiber-like surface structural steel(ASFSSS)joint reached 153.2 MPa,an 82.2%increase compared to the ABS joint,which reached 84.1 MPa.When the ASFSSS joints without the reinforcement were bent to 58.2°and 25.2°in the longitudinal and transverse direction,respectively,they remained intact.However,cracks were discovered when the bending angle of the ABS reached 39.1°and 0°in the two directions.Numerical simulation revealed that the short fiber-like interface structure significantly reduced residual stress and improved the stress distribution in the weld,thereby enhancing the strength and toughness of Al/steel dissimilar joints.The crack propagation path in the ASFSSS joint was deflected into the weld when it encountered short fibers,and the fracture morphology presented the characteristic of ductile-brittle mixed fracture.展开更多
Alloying and interface effects are effective strategies for enhancing the performance of electrocatalysts in energy-related devices.Herein,dendritic Au-doped platinum-palladium alloy/dumbbell-like bismuth telluride he...Alloying and interface effects are effective strategies for enhancing the performance of electrocatalysts in energy-related devices.Herein,dendritic Au-doped platinum-palladium alloy/dumbbell-like bismuth telluride heterostructures(denoted PtPdAu/BiTe)were synthesized using a visible-light-assisted strategy.The coupling alloy and interfacial effects of PtPdAu/BiTe significantly improved the performance and stability of both the ethanol oxidation reaction(EOR)and methanol oxidation reaction(MOR).Introducing a small amount of Au effectively enhanced the CO tolerance of PtPdAu/BiTe compared to dendritic platinum-palladium alloy/dumbbell-like bismuth telluride heterostructures.PtPdAu/BiTe exhibited mass activities of 31.5 and 13.3 A·mg_(Pt)^(-1)in EOR and MOR,respectively,which were 34.4 and 13.2 times higher than those of commercial Pt black,revealing efficient Pt atom utilization.In-situ Fourier transform infrared spectroscopy demonstrated complete 12e^(-)and 6e^(-)oxidation of ethanol and methanol on PtPdAu/BiTe.The PtPdAu/BiTe/C achieved mass peak power densities of 131 and 156 mW·mg_(Pt)^(-1),which were 2.4 and 2.2 times higher than those of Pt/C in practical direct ethanol fuel cell(DEFC)and direct methanol fuel cell(DMFC),respectively,highlighting their potential application in DEFC and DMFC.This study introduces an effective strategy for designing efficient and highly CO tolerant anodic electrocatalysts for practical DEFC and DMFC applications.展开更多
Currently,carbon materials derived from biomass are widely sought after as electromagnetic absorbing(EMWA)materials owing to the unique structure,as well as the wide range of natural acquisition pathways,economic viab...Currently,carbon materials derived from biomass are widely sought after as electromagnetic absorbing(EMWA)materials owing to the unique structure,as well as the wide range of natural acquisition pathways,economic viability,and simple processing.However,due to the high dielectric properties,mismatched impedance and single attenuation mechanism,they cannot achieve efficient EMWA performance.Herein,the biomass carbon/Co/porous carbon magnetic composites with a layered gradient structure were fabricated by in-situ deposition of ZIF-67 on the lotus leaf base and then pyrolysis at high temperature.By adjusting the pyrolysis temperature,the sample obtained at 650℃ achieved a minimum reflection value(RLmin)of-34.2dB at a matching thickness of 2.6mm,and a maximum effective absorption bandwidth(EAB)of 7.12GHz.The results indicate that this magnetic composite with a multi-sized layered gradient porous structure has a good electron transport network,a large number of heterogeneous interfaces,and dipole polarization centers,which are conducive to multiple reflection and scattering of microwaves,conduction loss,interface loss,magnetic loss,and impedance matching of materials.Therefore,this work provided a reference for optimizing the EMWA performance of carbon materials and designing a layered gradient porous magnetic composite with multi-sized structure.展开更多
Optimizing electrolytes is non-trivial and yet promising strategies to simultaneously address dendrite growth and parasitic reactions for aqueous zinc-ion batteries.Herein,we present a low-cost zwitterionic additive,1...Optimizing electrolytes is non-trivial and yet promising strategies to simultaneously address dendrite growth and parasitic reactions for aqueous zinc-ion batteries.Herein,we present a low-cost zwitterionic additive,1-butylsulfonic-3-methylimidazolium(BSM),to enhance conventional ZnSO_(4)electrolytes.Combining experimental characterization and theoretical calculations,the results reveal that the zincophilic sulfonate groups in BSM partially substitute coordinated H_(2)O molecules in the Zn^(2+)hydration shell,thereby optimizing solvation dynamics.Meanwhile,the imidazole groups are preferentially adsorbed onto the zinc anode surface,forming an adaptive layer that guides uniform Zn^(2+)deposition along the(002)crystal orientation,suppresses parasitic reaction,and mitigates dendrite growth.Consequently,the Zn||Zn symmetric cells with BSM electrolyte achieve an exceptional plating/stripping lifespan of 4000 h at 1 mA cm^(-2)(1 mA h cm^(-2))and over 1600 h under elevated current density(5 mA cm^(-2),5 mA h cm^(-2)).Moreover,the Zn||Cu asymmetric cell demonstrates a long cycle life exceeding 1100 cycles while it maintains an average Coulombic efficiency(CE)of above 99.5%.Impressively,the assembled Zn||NH_(4)V_(4)O_(10)(NVO)full cell with BSM modified ZnSO_(4)electrolyte retains 77.6%capacity retention after 1000 cycles at 5 A g^(-1).Thus,this work establishes a dual-regulatory mechanism through zwitterionic additives to enable dendrite-free anodes and ultra-stable aqueous metal batteries.展开更多
The microstructure,micro-hardness,and tensile properties of interface between hot isostatic pressing densified low alloy steel and Inconel 690 cladding were investigated during the aging process at 600℃.The results s...The microstructure,micro-hardness,and tensile properties of interface between hot isostatic pressing densified low alloy steel and Inconel 690 cladding were investigated during the aging process at 600℃.The results show that the interface region can be divided into four zones from base metal to deposited metal:carbon-depleted zone(CDZ),partial melting zone(PMZ),planar growth zone(PGZ),and brownish feature zone(BFZ).Dimensions of these zones do not significantly change during aging.However,type I carbides noticeably increase in size in the PMZ,and precipitates clearly occur in the PGZ.The main reason for their growth and occurrence is continuous carbon migration.The highest micro-hardness appears in the PGZ and BFZ regions,which is related to carbon accumulation and precipitates in these regions.Tensile failure occurs on the base metal side due to the high strength mismatch between these two materials.The CDZ,composed of only ferrite,has lower strength and fractures at the boundary between CDZ and base metal.The ultimate tensile strength decreases by only 50 MPa after aging for 1500 h,and the interface region maintains high strength without significant deformation.展开更多
The stability of the“surrounding rock-backfill”com posite system is crucial for the safety of mining stopes.This study systematically investigates the effects of steel slag(SS)content and interface angle on the stre...The stability of the“surrounding rock-backfill”com posite system is crucial for the safety of mining stopes.This study systematically investigates the effects of steel slag(SS)content and interface angle on the strength and failure characteristics of rock and SS-cemented paste backfill composite specimens(RBCS)through uniaxial compression strength tests(UCS),acoustic emission systems(AE),and 3 D digital image correlation monitoring technology(3 D-DIC).The intrinsic mechanism by which SS content influences the strength of SS-CPB was revealed through an analysis of its hydration reaction degree and microstructural characteristics under varying SS content.Moreover,a theoretical strength model incorporating different interface angles was developed to explore the impact of interface inclination on failure modes and mechanical strength.The main conclusions are as follows:The incorporation of SS enhances the plastic characteristics of RBCS and reduces its brittleness,with the increase of SS content,the stress-strain curve of RBCS in the“staircase-like”stag e becomes smoother;When the interface angle is 45°,the RBCS stress-strain curve exhibits a bimodal feature,and the failure mode changes from Y-shaped fractures to interface and axial splitting;The addition of SS results in a reduction of hydration products such as Ca(OH)_(2) in the backfill cementing system and an increase in harmful pores,which weakens the bonding performance and strength of RBCS,and the SS content should not exceed 45%;As the interface angle increases,the strength of RBCS decreases,and the critical interface slip angle decreases first and then increases with the increase in the E S/E R ratio.This study provides technical references for the large-scale application of SS in mine backfill.展开更多
Buried interface passivation is crucial for high-efficiency,stable perovskite solar cells(PSCs).Herein,we design a three-layer passivation structure toward the buried interface of inverted PSCs,consisting of NiO_(x),p...Buried interface passivation is crucial for high-efficiency,stable perovskite solar cells(PSCs).Herein,we design a three-layer passivation structure toward the buried interface of inverted PSCs,consisting of NiO_(x),poly(V-p-TPD)and PFN-Br(V-p-TPD,N,N'-di-p-tolyl-N,-N'-bis(4-vinylphenyl)-[1,1'-biphenyl]-4,4'-diamine;PFN-Br,poly[(9,9-bis(3'-((N,N-dimethyl)-N-ethylammonium)-propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)]dibromide).Typically,in situ poly(V-p-TPD)layer on the NiO_(x) surface was obtained by a simple thermal crosslinking process.This poly(V-p-TPD)/NiO_(x) bilayer structure is beneficial for hole extraction and high-quality perovskite films with larger grain sizes and less lattice distortion.On this basis,the PFN-Br is further introduced as a surface modification layer,which can not only optimize the energy level alignment with the perovskite but also passivate defects and suppress carrier recombination at the perovskite bottom interface.Finally,inverted PSCs based on(FA_(0.95)Cs_(0.05))PbI_(3) present 25.5%efficiency with a low V_(OC)deficit.Besides,the devices could maintain 91.15%of the initial efficiency after being stored at 85℃for 1080 h,indicating excellent thermal stability.This work highlights the potential of a three-layered passivation structure based on crosslinking polymer HTLs for highly efficient and stable PSCs.展开更多
The formation of interphase layers,including the cathode-electrolyte interphase(CEI)and solidelectrolyte interphase(SEI),exhibits significant chemical complexity and plays a pivotal role in determining the performance...The formation of interphase layers,including the cathode-electrolyte interphase(CEI)and solidelectrolyte interphase(SEI),exhibits significant chemical complexity and plays a pivotal role in determining the performance of lithium batteries.Despite considerable advances in simulating the bulk phase properties of battery materials,the understanding of interfaces,including crystalline interfaces that represent the simplest case,remains limited.This is primarily due to challenges in performing ground-state searches for interface microstructures and the high computational costs associated with first-principles methods.Herein,we introduce InterOptimus,an automated workflow designed to efficiently search for ground-state heterogeneous interfaces.InterOptimus incorporates a rigorous,symmetry-aware equivalence analysis for lattice matching and termination scanning.Additionally,it introduces stereographic projection as an intuitive and comprehensive framework for visualizing and classifying interface structures.By integrating universal machine learning interatomic potentials(MLIPs),InterOptimus enables rapid predictions of interface energy and stability,significantly reducing the necessary computational cost in density functional theory(DFT)by over 90%.We benchmarked several MLIPs at three critical lithium battery interfaces,Li_(2)S|Ni_(3)S_(2),LiF|NCM,and Li_(3)PS_(4)|Li,and demonstrated that the MLIPs achieve accuracy comparable to DFT in modeling potential energy surfaces and ranking interface stabilities.Thus,InterOptimus facilitates the efficient determination of ground-state heterogeneous interface structures and subsequent studies of structure-property relationships,accelerating the interface engineering of novel battery materials.展开更多
Direct seawater electrolysis is a promising way for hydrogen energy production.However,developing efficient and cost-effective electrocatalysts remains a significant challenge for seawater electrolysis with industrial...Direct seawater electrolysis is a promising way for hydrogen energy production.However,developing efficient and cost-effective electrocatalysts remains a significant challenge for seawater electrolysis with industrial-level current density due to high concentration of salts and compete reaction of chlorine evolution.Herein,a 1D NiFe_(2)O_(4)/NiMoO_(4) heterostructure as a bifunctional electrocatalyst for overall seawater splitting is constructed by combining NiMoO_(4) nanowires with NiFe_(2)O_(4)nanoparticles on carbon felt(CF)by a simple hydrothermal,impregnation and calcination method.The electrocatalyst exhibits low overpotential of 237 and 292 mV for oxygen evolution reaction and hydrogen evolution reaction at 400 m A/cm^(2)in the alkaline seawater(1 mol/L KOH+0.5 mol/L NaCl)due to the plentiful interfaces of NiFe_(2)O_(4)/NiMoO_4 which exposes more active sites and expands the active surface area,thereby enhancing its intrinsic activity and promoting the reaction kinetics.Notably,it displays low voltages of 1.95 V to drive current density of 400 m A/cm^(2)in alkaline seawater with its excellent stability of 200 h at above 100 m A/cm^(2),exhibiting outstanding performance and good corrosion resistance.This work provides an effective strategy for constructing efficient and cost-effective electrocatalysts for industrial seawater electrolysis,underscoring its potential for sustainable energy applications.展开更多
The interface microstructures and strain distribution of dissimilar friction stir welding(FSW)of AA7075/AZ31B joints with or without ultrasonic vibration were examined.The results reveal that the ultrasonic vibrations...The interface microstructures and strain distribution of dissimilar friction stir welding(FSW)of AA7075/AZ31B joints with or without ultrasonic vibration were examined.The results reveal that the ultrasonic vibrations and tool offset greatly influence the dynamic recovery towards the Mg side by reducing the non-indexing region at the interface.Moreover,the grain recrystallization near the interface differed from the other areas due to severe deformation.Continuous dynamic recrystallization(CDRX)occurs at the AA7075 side,whereas the Mg side exhibits discontinuous dynamic recrystallization(DDRX).The higher net strain component was observed for ultrasonic-assisted FSW(UVaFSW).The strain component was changed significantly towards the AA7075 side compared with the AZ31B side.It occurred because of different recrystallization mechanisms.The strain component was well spread towards the AA7075 side,whereas the dispersed strain component was observed towards the AZ31B.Along the plate thickness direction,the intermetallic compound layer(IMC)thickness first increases,then decreases,reaching a maximum value of 1.5–1.8 mm from the top.The ultrasonic vibration reduced the overall thickness of intermetallic in the joint interface,regardless of the tool offset conditions.展开更多
Triggering structural asymmetry can induce charge redistribution and modify electronic structures,which is of great significance for the design of high-performance hydrogen oxidation reaction(HOR)electrocatalysts.Here...Triggering structural asymmetry can induce charge redistribution and modify electronic structures,which is of great significance for the design of high-performance hydrogen oxidation reaction(HOR)electrocatalysts.Herein,we propose a dual anion-induced strategy to create an innovative RuS_(2)-RuO_(2)heterostructure featuring abundant S-Ru-O interfaces(RuS_(2)-RuO_(2)@C).This RuS_(2)-RuO_(2)@C demonstrates an impressive mass activity of 2.61 mAμg_(RU)^(-1)and an exchange current density of 2.96 mA cm^(-2),surpassing Pt/C and other comparative samples by over 20 times.Durability assessments confirm the superior stability of RuS_(2)-RuO_(2)@C,with only minimal performance loss during operation.Density functional theory(DFT)calculations indicate that the asymmetric S-Ru-O configuration optimizes the interfacial electronic structure and shifts the d-band center closer to the Fermi level,effectively reducing the energy barrier of the rate-determining step(RDS)in the alkaline HOR process.Moreover,in situ attenuated total reflection surface-enhanced infrared absorption spectroscopy(ATR-SEIRAS)characteristics disclose the formation of a substantial hydrogen bond network at the S-Ru-o interface,which aids in the desorption of H_(2)O_(ad)and facilitates the vital Volmer step in the HOR pathway.展开更多
As-rolled titanium/steel composite plate has poor plastic deformation ability,and it is difficult to achieve synergistic deformation,especially for dissimilar metals with very different plastic deformation abilities.T...As-rolled titanium/steel composite plate has poor plastic deformation ability,and it is difficult to achieve synergistic deformation,especially for dissimilar metals with very different plastic deformation abilities.The 304/TC4 composite plate with corrugated interface was manufactured using the asymmetric rolling with local strong stress method.The changing rules of bonding strength and synergistic deformation ability of corrugated interface under different annealing process parameters were studied.The results show that in the range of 550–850℃,especially after the temperature exceeds 650℃,with increasing the annealing temperature and time,the difference of microstructure between peak and trough positions increases,and the bonding strength of the composite plate decreases gradually.Especially,the interfacial bonding strength of the plate sharply decreases at 750℃ due to the rapid growth of intermetallic compounds at the interface and the diffusion holes caused by the difference of element diffusion.The 304/TC4 composite plate has the best synergistic deformation ability when annealing at 650℃/2 h,with the elongation reaching 35%and the tensile strength decreasing to 852 MPa.High interfacial bonding strength and moderate matrix recovery are important prerequisites for synergistic deformation of composite plates.展开更多
The photocatalytic reduction of CO_(2)presents a promising avenue for carbon fuel conversion.However,the efficiency of charge utilization remains a critical barrier to industrial applications.In this study,we introduc...The photocatalytic reduction of CO_(2)presents a promising avenue for carbon fuel conversion.However,the efficiency of charge utilization remains a critical barrier to industrial applications.In this study,we introduce a tandem design of Bi_(2)WO_(6)-BiOCl with an atomically matched interface,achieving highly efficient photoreduction of CO_(2)to CO.By incorporating WO_(4)^(2-)ions and tuning coordination environment,the(110)facet of BiOCl was in-situ grown on the(200)facet of Bi_(2)WO_(6).Compared to single phases and ball-milling samples,Bi_(2)WO_(6)-BiOCl exhibits a remarkable CO yield of 68.03μmol g^(-1)h^(-1)with a selectivity of 98%.Atomic visualization and coordination analysis confirm the formation of a coherent interface that facilitates charge migration for efficient electron transport.Density functional theory(DFT)calculations and in-situ Fourier transform infrared(FTIR)spectroscopy provide insights into the intrinsic active sites and reaction mechanisms.The proposed lattice engineering strategies offer a new paradigm for the rational design of heterostructures beyond traditional band alignment at the atomic scale.展开更多
Sodium-ion batteries with ZnIn_(2)S_(4)(ZIS)anodes promise a high capacity and abundant resources.However,their inherent low conductivity,large volume expansion and sluggish Na+diffusion limit the development of the w...Sodium-ion batteries with ZnIn_(2)S_(4)(ZIS)anodes promise a high capacity and abundant resources.However,their inherent low conductivity,large volume expansion and sluggish Na+diffusion limit the development of the wide-temperature sodium storage.This study pioneers a scalable synthesis of hierarchical hollow structural ZIS/C heterostructure through in situ confined growth of ZIS nanosheets in porous hollow carbon spheres(PHCSs)via a hydrothermal method.This unique structure exhibits abundant heterostructures to facilitate charge transport,rich porous structures to promote electrolyte wettability,efficient space utilization to relieve volume expansion,as well as interconnected carbon networks to ensure framework stability.Consequently,ZIS/C exhibits exceptional cycling stability with 92%capacity retention after 1000 cycles.Notably,ZIS/C demonstrates good wide-temperature performance operating at–50∼90°C,especially,at–30°C with a capacity of 208 mA h g^(−1)at 0.3A g^(−1).The full cell of ZIS/C||Na_(3)V_(2)(PO_(4))_(3)exhibits excellent high-rate capability(178 mA h g^(−1)at 6A g^(−1)).展开更多
The rapid development of 5G communication technology and smart electronic and electrical equipment will inevitably lead to electromagnetic radiation pollution.Enriching heterointerface polarization relaxation through ...The rapid development of 5G communication technology and smart electronic and electrical equipment will inevitably lead to electromagnetic radiation pollution.Enriching heterointerface polarization relaxation through nanostructure design and interface modifica-tion has proven to be an effective strategy to obtain efficient electromagnetic wave absorption.Here,this work implements an innovative method that combines biomimetic honeycomb superstructure to constrain hierarchical porous heterostructure composed of Co/CoO nano-particles to improve the interfacial polarization intensity.The method effectively controlled the absorption efficiency of Co^(2+)through de-lignification modification of bamboo,and combined with the bionic carbon-based natural hierarchical porous structure to achieve uniform dispersion of nanoparticles,which is conducive to the in-depth construction of heterogeneous interfaces.In addition,the multiphase struc-ture brought about by high-temperature pyrolysis provides the best dielectric loss and impedance matching for the material.Therefore,the obtained bamboo-based Co/CoO multiphase composite showed excellent electromagnetic wave absorption performance,achieving excel-lent reflection loss(RL)of-79 dB and effective absorption band width of 4.12 GHz(6.84-10.96 GHz)at low load of 15wt%.Among them,the material’s optimal radar cross-section(RCS)reduction value can reach 31.9 dB·m^(2).This work provides a new approach to the micro-control and comprehensive optimization of macro-design of microwave absorbers,and offers new ideas for the high-value utiliza-tion of biomass materials.展开更多
基金supported by Guangdong Major Project of Basic and Applied Basic Research, China (No. 2020B0301030006)Fundamental Research Funds for the Central Universities, China (No. SWU-XDJH202313)+1 种基金Chongqing Postdoctoral Science Foundation Funded Project, China (No. 2112012728014435)the Chongqing Postgraduate Research and Innovation Project, China (No. CYS23197)。
文摘A new method was proposed for preparing AZ31/1060 composite plates with a corrugated interface,which involved cold-pressing a corrugated surface on the Al plate and then hot-pressing the assembled Mg/Al plate.The results show that cold-pressing produces intense plastic deformation near the corrugated surface of the Al plate,which promotes dynamic recrystallization of the Al substrate near the interface during the subsequent hot-pressing.In addition,the initial corrugation on the surface of the Al plate also changes the local stress state near the interface during hot pressing,which has a large effect on the texture components of the substrates near the corrugated interface.The construction of the corrugated interface can greatly enhance the shear strength by 2−4 times due to the increased contact area and the strong“mechanical gearing”effect.Moreover,the mechanical properties are largely depended on the orientation relationship between corrugated direction and loading direction.
基金supported by the National Natural Science Foundation of China[52125307(to P.G.),12404192(to R.C.S),12274061(to L.Q.)]Key Research and Development Program from the Ministry of Science and Technology(2023YFA1406301)the support from the New Cornerstone Science Foundation through the XPLORER PRIZE。
文摘The infinite-layer nickelates,proposed as analogs to superconducting cuprates,provide a promising platform for exploring the mechanisms of unconventional superconductivity.However,the superconductivity has been exclusively observed in thin films under atmospheric pressure,underscoring the critical role of the heterointerface.
基金supported by the National Natural Science Foundation of China(No.52275362)Natural Science Foundation of Shanxi Province,China(No.202303021224002)the Central Government Guides the Special Fund Projects of Local Scientific and Technological Development(Nos.YDZJSX2021A020,YDZJSX2022A023).
文摘The effects of the reduction rate of the corrugated rolling on the microstructure and mechanical properties of TA1/TC4 composite plate that was prepared via corrugated rolling+flat rolling process were investigated.The finite element model was developed and validated for the corrugated rolling process of the composite plate.Experimental findings reveal the absence of significant defects and intermetallic compounds at the bonding interface.When the rolling temperature is 700℃with the reduction rate of 44%in the first pass of corrugated rolling,the tensile and interfacial shear strengths of the composite plate reach 749 and 403.97 MPa,respectively.The simulation results demonstrate that the plastic strain in the TC4 substrate is enhanced by corrugated rolling and the compressive stress at the trough is high.These results confirm that interfacial bonding is promoted by corrugated rolling,and the mechanical properties of the composite plate are improved significantly with the increase of reduction rate.
基金National Natural Science Foundation of China(32201491)Young Elite Scientists Sponsorship Program by CAST(2023QNRC001)The authors extend their appreciation to the Deanship of Scientific Research at Northern Border University,Arar,KSA for funding this research work through the project number“NBU-FPEJ-2024-1101-02”.
文摘Research efforts on electromagnetic interference(EMI)shielding materials have begun to converge on green and sustainable biomass materials.These materials offer numerous advantages such as being lightweight,porous,and hierarchical.Due to their porous nature,interfacial compatibility,and electrical conductivity,biomass materials hold significant potential as EMI shielding materials.Despite concerted efforts on the EMI shielding of biomass materials have been reported,this research area is still relatively new compared to traditional EMI shielding materials.In particular,a more comprehensive study and summary of the factors influencing biomass EMI shielding materials including the pore structure adjustment,preparation process,and micro-control would be valuable.The preparation methods and characteristics of wood,bamboo,cellulose and lignin in EMI shielding field are critically discussed in this paper,and similar biomass EMI materials are summarized and analyzed.The composite methods and fillers of various biomass materials were reviewed.this paper also highlights the mechanism of EMI shielding as well as existing prospects and challenges for development trends in this field.
基金supported by the National Natural Science Foundation of China(No.52275306)the Beijing Municipal Natural Science Foundation(No.3232021).
文摘The lamellar layer of intermetallic compounds(IMCs)was adversely affected the performance of welding-brazing joints in Al/steel dissimilar metals.In this study,a short fiber-like surface morphology was fabricated on the butt surface of Q235 steel via laser.The interaction behavior between the short fibers and the molten pool was captured using a high-speed camera.Laser-arc hybrid welding-brazing was then employed to join Al(6061-T6)to the steel.This process successfully created a short fiber-like interface structure at the joint.The relationship between microstructure and mechanical properties was investigated,compared with Al/bare steel(ABS)joint.The research results indicated that the IMCs layer consisted of FeAl_(3)and Fe_(2)Al_(5).The interface strength of the Al/short fiber-like surface structural steel(ASFSSS)joint reached 153.2 MPa,an 82.2%increase compared to the ABS joint,which reached 84.1 MPa.When the ASFSSS joints without the reinforcement were bent to 58.2°and 25.2°in the longitudinal and transverse direction,respectively,they remained intact.However,cracks were discovered when the bending angle of the ABS reached 39.1°and 0°in the two directions.Numerical simulation revealed that the short fiber-like interface structure significantly reduced residual stress and improved the stress distribution in the weld,thereby enhancing the strength and toughness of Al/steel dissimilar joints.The crack propagation path in the ASFSSS joint was deflected into the weld when it encountered short fibers,and the fracture morphology presented the characteristic of ductile-brittle mixed fracture.
基金supported by the National Natural Science Foundation of China(No.22465009)the Education Department of Guizhou Province(No.2021312)the Foundation of Guizhou Province(No.2019-5666).
文摘Alloying and interface effects are effective strategies for enhancing the performance of electrocatalysts in energy-related devices.Herein,dendritic Au-doped platinum-palladium alloy/dumbbell-like bismuth telluride heterostructures(denoted PtPdAu/BiTe)were synthesized using a visible-light-assisted strategy.The coupling alloy and interfacial effects of PtPdAu/BiTe significantly improved the performance and stability of both the ethanol oxidation reaction(EOR)and methanol oxidation reaction(MOR).Introducing a small amount of Au effectively enhanced the CO tolerance of PtPdAu/BiTe compared to dendritic platinum-palladium alloy/dumbbell-like bismuth telluride heterostructures.PtPdAu/BiTe exhibited mass activities of 31.5 and 13.3 A·mg_(Pt)^(-1)in EOR and MOR,respectively,which were 34.4 and 13.2 times higher than those of commercial Pt black,revealing efficient Pt atom utilization.In-situ Fourier transform infrared spectroscopy demonstrated complete 12e^(-)and 6e^(-)oxidation of ethanol and methanol on PtPdAu/BiTe.The PtPdAu/BiTe/C achieved mass peak power densities of 131 and 156 mW·mg_(Pt)^(-1),which were 2.4 and 2.2 times higher than those of Pt/C in practical direct ethanol fuel cell(DEFC)and direct methanol fuel cell(DMFC),respectively,highlighting their potential application in DEFC and DMFC.This study introduces an effective strategy for designing efficient and highly CO tolerant anodic electrocatalysts for practical DEFC and DMFC applications.
基金supported by the National Natural Science Foundation of China(Nos.21667019,22066017,and 52173267)the Aviation Science Foundation of China(No.2017ZF56020).
文摘Currently,carbon materials derived from biomass are widely sought after as electromagnetic absorbing(EMWA)materials owing to the unique structure,as well as the wide range of natural acquisition pathways,economic viability,and simple processing.However,due to the high dielectric properties,mismatched impedance and single attenuation mechanism,they cannot achieve efficient EMWA performance.Herein,the biomass carbon/Co/porous carbon magnetic composites with a layered gradient structure were fabricated by in-situ deposition of ZIF-67 on the lotus leaf base and then pyrolysis at high temperature.By adjusting the pyrolysis temperature,the sample obtained at 650℃ achieved a minimum reflection value(RLmin)of-34.2dB at a matching thickness of 2.6mm,and a maximum effective absorption bandwidth(EAB)of 7.12GHz.The results indicate that this magnetic composite with a multi-sized layered gradient porous structure has a good electron transport network,a large number of heterogeneous interfaces,and dipole polarization centers,which are conducive to multiple reflection and scattering of microwaves,conduction loss,interface loss,magnetic loss,and impedance matching of materials.Therefore,this work provided a reference for optimizing the EMWA performance of carbon materials and designing a layered gradient porous magnetic composite with multi-sized structure.
基金financially supported by the National Natural Science Foundation of China(No.21703152,21801136,52025013,and 22121005)the National Key R&D Program of China(2021YFB4000200)the Natural Science Foundation of Tianjin(No.19JCQNJC02000)。
文摘Optimizing electrolytes is non-trivial and yet promising strategies to simultaneously address dendrite growth and parasitic reactions for aqueous zinc-ion batteries.Herein,we present a low-cost zwitterionic additive,1-butylsulfonic-3-methylimidazolium(BSM),to enhance conventional ZnSO_(4)electrolytes.Combining experimental characterization and theoretical calculations,the results reveal that the zincophilic sulfonate groups in BSM partially substitute coordinated H_(2)O molecules in the Zn^(2+)hydration shell,thereby optimizing solvation dynamics.Meanwhile,the imidazole groups are preferentially adsorbed onto the zinc anode surface,forming an adaptive layer that guides uniform Zn^(2+)deposition along the(002)crystal orientation,suppresses parasitic reaction,and mitigates dendrite growth.Consequently,the Zn||Zn symmetric cells with BSM electrolyte achieve an exceptional plating/stripping lifespan of 4000 h at 1 mA cm^(-2)(1 mA h cm^(-2))and over 1600 h under elevated current density(5 mA cm^(-2),5 mA h cm^(-2)).Moreover,the Zn||Cu asymmetric cell demonstrates a long cycle life exceeding 1100 cycles while it maintains an average Coulombic efficiency(CE)of above 99.5%.Impressively,the assembled Zn||NH_(4)V_(4)O_(10)(NVO)full cell with BSM modified ZnSO_(4)electrolyte retains 77.6%capacity retention after 1000 cycles at 5 A g^(-1).Thus,this work establishes a dual-regulatory mechanism through zwitterionic additives to enable dendrite-free anodes and ultra-stable aqueous metal batteries.
基金Major Scientific and Technological Project of Gansu(22ZD6GA008)Excellent Doctorate Project of Gansu(23JRRA806)National Natural Science Foundation of China(52175325,51961024,52071170)。
文摘The microstructure,micro-hardness,and tensile properties of interface between hot isostatic pressing densified low alloy steel and Inconel 690 cladding were investigated during the aging process at 600℃.The results show that the interface region can be divided into four zones from base metal to deposited metal:carbon-depleted zone(CDZ),partial melting zone(PMZ),planar growth zone(PGZ),and brownish feature zone(BFZ).Dimensions of these zones do not significantly change during aging.However,type I carbides noticeably increase in size in the PMZ,and precipitates clearly occur in the PGZ.The main reason for their growth and occurrence is continuous carbon migration.The highest micro-hardness appears in the PGZ and BFZ regions,which is related to carbon accumulation and precipitates in these regions.Tensile failure occurs on the base metal side due to the high strength mismatch between these two materials.The CDZ,composed of only ferrite,has lower strength and fractures at the boundary between CDZ and base metal.The ultimate tensile strength decreases by only 50 MPa after aging for 1500 h,and the interface region maintains high strength without significant deformation.
基金Project(52308316)supported by the National Natural Science Foundation of China,Project(BBJ2024088)supported by the Fundamental Research Funds for the Central Universities(PhD.Top Innovative Talents Fund of CUMTB),China。
文摘The stability of the“surrounding rock-backfill”com posite system is crucial for the safety of mining stopes.This study systematically investigates the effects of steel slag(SS)content and interface angle on the strength and failure characteristics of rock and SS-cemented paste backfill composite specimens(RBCS)through uniaxial compression strength tests(UCS),acoustic emission systems(AE),and 3 D digital image correlation monitoring technology(3 D-DIC).The intrinsic mechanism by which SS content influences the strength of SS-CPB was revealed through an analysis of its hydration reaction degree and microstructural characteristics under varying SS content.Moreover,a theoretical strength model incorporating different interface angles was developed to explore the impact of interface inclination on failure modes and mechanical strength.The main conclusions are as follows:The incorporation of SS enhances the plastic characteristics of RBCS and reduces its brittleness,with the increase of SS content,the stress-strain curve of RBCS in the“staircase-like”stag e becomes smoother;When the interface angle is 45°,the RBCS stress-strain curve exhibits a bimodal feature,and the failure mode changes from Y-shaped fractures to interface and axial splitting;The addition of SS results in a reduction of hydration products such as Ca(OH)_(2) in the backfill cementing system and an increase in harmful pores,which weakens the bonding performance and strength of RBCS,and the SS content should not exceed 45%;As the interface angle increases,the strength of RBCS decreases,and the critical interface slip angle decreases first and then increases with the increase in the E S/E R ratio.This study provides technical references for the large-scale application of SS in mine backfill.
基金financial support from the Ministry of Science and Technology of China(2021YFB3800103)Natural Science Foundation of China(U24A6003,52361145847,52172260,52227803,52222212)Chinese Academy of Sciences-Commonwealth Scientific and Industrial Research Organization(CAS-CSIRO)Joint Project(112111KYSB20210017)。
文摘Buried interface passivation is crucial for high-efficiency,stable perovskite solar cells(PSCs).Herein,we design a three-layer passivation structure toward the buried interface of inverted PSCs,consisting of NiO_(x),poly(V-p-TPD)and PFN-Br(V-p-TPD,N,N'-di-p-tolyl-N,-N'-bis(4-vinylphenyl)-[1,1'-biphenyl]-4,4'-diamine;PFN-Br,poly[(9,9-bis(3'-((N,N-dimethyl)-N-ethylammonium)-propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)]dibromide).Typically,in situ poly(V-p-TPD)layer on the NiO_(x) surface was obtained by a simple thermal crosslinking process.This poly(V-p-TPD)/NiO_(x) bilayer structure is beneficial for hole extraction and high-quality perovskite films with larger grain sizes and less lattice distortion.On this basis,the PFN-Br is further introduced as a surface modification layer,which can not only optimize the energy level alignment with the perovskite but also passivate defects and suppress carrier recombination at the perovskite bottom interface.Finally,inverted PSCs based on(FA_(0.95)Cs_(0.05))PbI_(3) present 25.5%efficiency with a low V_(OC)deficit.Besides,the devices could maintain 91.15%of the initial efficiency after being stored at 85℃for 1080 h,indicating excellent thermal stability.This work highlights the potential of a three-layered passivation structure based on crosslinking polymer HTLs for highly efficient and stable PSCs.
基金supported by the National Natural Science Foundation of China(92470110)the Special Funds for the Development of Strategic Emerging Industries in Shenzhen(XMHT20240108008)the Shenzhen Stable Support Program for Higher Education Institutions(WDZC20231126215806001)。
文摘The formation of interphase layers,including the cathode-electrolyte interphase(CEI)and solidelectrolyte interphase(SEI),exhibits significant chemical complexity and plays a pivotal role in determining the performance of lithium batteries.Despite considerable advances in simulating the bulk phase properties of battery materials,the understanding of interfaces,including crystalline interfaces that represent the simplest case,remains limited.This is primarily due to challenges in performing ground-state searches for interface microstructures and the high computational costs associated with first-principles methods.Herein,we introduce InterOptimus,an automated workflow designed to efficiently search for ground-state heterogeneous interfaces.InterOptimus incorporates a rigorous,symmetry-aware equivalence analysis for lattice matching and termination scanning.Additionally,it introduces stereographic projection as an intuitive and comprehensive framework for visualizing and classifying interface structures.By integrating universal machine learning interatomic potentials(MLIPs),InterOptimus enables rapid predictions of interface energy and stability,significantly reducing the necessary computational cost in density functional theory(DFT)by over 90%.We benchmarked several MLIPs at three critical lithium battery interfaces,Li_(2)S|Ni_(3)S_(2),LiF|NCM,and Li_(3)PS_(4)|Li,and demonstrated that the MLIPs achieve accuracy comparable to DFT in modeling potential energy surfaces and ranking interface stabilities.Thus,InterOptimus facilitates the efficient determination of ground-state heterogeneous interface structures and subsequent studies of structure-property relationships,accelerating the interface engineering of novel battery materials.
基金supported by the National Natural Science Foundation of China(No.51908408)the Science&Technology Development Fund of Tianjin Education Commission for Higher Education(No.2019KJ008)Basic Research Program of Jiangsu Province(No.BK20241845)。
文摘Direct seawater electrolysis is a promising way for hydrogen energy production.However,developing efficient and cost-effective electrocatalysts remains a significant challenge for seawater electrolysis with industrial-level current density due to high concentration of salts and compete reaction of chlorine evolution.Herein,a 1D NiFe_(2)O_(4)/NiMoO_(4) heterostructure as a bifunctional electrocatalyst for overall seawater splitting is constructed by combining NiMoO_(4) nanowires with NiFe_(2)O_(4)nanoparticles on carbon felt(CF)by a simple hydrothermal,impregnation and calcination method.The electrocatalyst exhibits low overpotential of 237 and 292 mV for oxygen evolution reaction and hydrogen evolution reaction at 400 m A/cm^(2)in the alkaline seawater(1 mol/L KOH+0.5 mol/L NaCl)due to the plentiful interfaces of NiFe_(2)O_(4)/NiMoO_4 which exposes more active sites and expands the active surface area,thereby enhancing its intrinsic activity and promoting the reaction kinetics.Notably,it displays low voltages of 1.95 V to drive current density of 400 m A/cm^(2)in alkaline seawater with its excellent stability of 200 h at above 100 m A/cm^(2),exhibiting outstanding performance and good corrosion resistance.This work provides an effective strategy for constructing efficient and cost-effective electrocatalysts for industrial seawater electrolysis,underscoring its potential for sustainable energy applications.
基金supported by postdoctoral program of Shandong University,Jinan,Chinathe financial support from the National Natural Science Foundation of China(Grant Nos.52035005)the Key R&D Program of Shandong Province in China(Grant No.2021ZLGX01)。
文摘The interface microstructures and strain distribution of dissimilar friction stir welding(FSW)of AA7075/AZ31B joints with or without ultrasonic vibration were examined.The results reveal that the ultrasonic vibrations and tool offset greatly influence the dynamic recovery towards the Mg side by reducing the non-indexing region at the interface.Moreover,the grain recrystallization near the interface differed from the other areas due to severe deformation.Continuous dynamic recrystallization(CDRX)occurs at the AA7075 side,whereas the Mg side exhibits discontinuous dynamic recrystallization(DDRX).The higher net strain component was observed for ultrasonic-assisted FSW(UVaFSW).The strain component was changed significantly towards the AA7075 side compared with the AZ31B side.It occurred because of different recrystallization mechanisms.The strain component was well spread towards the AA7075 side,whereas the dispersed strain component was observed towards the AZ31B.Along the plate thickness direction,the intermetallic compound layer(IMC)thickness first increases,then decreases,reaching a maximum value of 1.5–1.8 mm from the top.The ultrasonic vibration reduced the overall thickness of intermetallic in the joint interface,regardless of the tool offset conditions.
基金supported by the National Natural Science Foundation of China(no.52363028,21965005)the Natural Science Foundation of Guangxi Province(2021GXNSFAA076001,2018GXNSFAA294077)the Guangxi Technology Base and Talent Subject(GUIKE AD23023004,GUIKE AD20297039).
文摘Triggering structural asymmetry can induce charge redistribution and modify electronic structures,which is of great significance for the design of high-performance hydrogen oxidation reaction(HOR)electrocatalysts.Herein,we propose a dual anion-induced strategy to create an innovative RuS_(2)-RuO_(2)heterostructure featuring abundant S-Ru-O interfaces(RuS_(2)-RuO_(2)@C).This RuS_(2)-RuO_(2)@C demonstrates an impressive mass activity of 2.61 mAμg_(RU)^(-1)and an exchange current density of 2.96 mA cm^(-2),surpassing Pt/C and other comparative samples by over 20 times.Durability assessments confirm the superior stability of RuS_(2)-RuO_(2)@C,with only minimal performance loss during operation.Density functional theory(DFT)calculations indicate that the asymmetric S-Ru-O configuration optimizes the interfacial electronic structure and shifts the d-band center closer to the Fermi level,effectively reducing the energy barrier of the rate-determining step(RDS)in the alkaline HOR process.Moreover,in situ attenuated total reflection surface-enhanced infrared absorption spectroscopy(ATR-SEIRAS)characteristics disclose the formation of a substantial hydrogen bond network at the S-Ru-o interface,which aids in the desorption of H_(2)O_(ad)and facilitates the vital Volmer step in the HOR pathway.
基金supported by the Major Program of National Natural Science Foundation of China(U22A20188)the Natural Science Foundation of Shanxi Province(202303021224002)+1 种基金the special fund for Science and Technology Innovation Teams of Shanxi Province(202304051001025)the Open Research Fund from the Hai’an and Taiyuan University of Technology Advanced Manufacturing and Intelligent Equipment Industrial Research Institute(2023HA-TYUTKFYF036).
文摘As-rolled titanium/steel composite plate has poor plastic deformation ability,and it is difficult to achieve synergistic deformation,especially for dissimilar metals with very different plastic deformation abilities.The 304/TC4 composite plate with corrugated interface was manufactured using the asymmetric rolling with local strong stress method.The changing rules of bonding strength and synergistic deformation ability of corrugated interface under different annealing process parameters were studied.The results show that in the range of 550–850℃,especially after the temperature exceeds 650℃,with increasing the annealing temperature and time,the difference of microstructure between peak and trough positions increases,and the bonding strength of the composite plate decreases gradually.Especially,the interfacial bonding strength of the plate sharply decreases at 750℃ due to the rapid growth of intermetallic compounds at the interface and the diffusion holes caused by the difference of element diffusion.The 304/TC4 composite plate has the best synergistic deformation ability when annealing at 650℃/2 h,with the elongation reaching 35%and the tensile strength decreasing to 852 MPa.High interfacial bonding strength and moderate matrix recovery are important prerequisites for synergistic deformation of composite plates.
基金supported by the National Key R&D Program of China(No.2021YFA1200201)the Beijing Outstanding Young Scientists Projects(No.BJJWZYJH01201910005018)+1 种基金The Basic Science Center Program for Multiphase Evolution in Hypergravity of the National Natural Science Foundation of China(No.51988101)the National Natural Science Foundation of China(Nos.52071003 and 91860202)。
文摘The photocatalytic reduction of CO_(2)presents a promising avenue for carbon fuel conversion.However,the efficiency of charge utilization remains a critical barrier to industrial applications.In this study,we introduce a tandem design of Bi_(2)WO_(6)-BiOCl with an atomically matched interface,achieving highly efficient photoreduction of CO_(2)to CO.By incorporating WO_(4)^(2-)ions and tuning coordination environment,the(110)facet of BiOCl was in-situ grown on the(200)facet of Bi_(2)WO_(6).Compared to single phases and ball-milling samples,Bi_(2)WO_(6)-BiOCl exhibits a remarkable CO yield of 68.03μmol g^(-1)h^(-1)with a selectivity of 98%.Atomic visualization and coordination analysis confirm the formation of a coherent interface that facilitates charge migration for efficient electron transport.Density functional theory(DFT)calculations and in-situ Fourier transform infrared(FTIR)spectroscopy provide insights into the intrinsic active sites and reaction mechanisms.The proposed lattice engineering strategies offer a new paradigm for the rational design of heterostructures beyond traditional band alignment at the atomic scale.
基金supported by the National Natural Science Foundation of China(U23B2075)the Natural Science Foundation of Shandong Province(ZR202111290333)the China Postdoctoral Science Foundation(2023M730640,2024M750490).
文摘Sodium-ion batteries with ZnIn_(2)S_(4)(ZIS)anodes promise a high capacity and abundant resources.However,their inherent low conductivity,large volume expansion and sluggish Na+diffusion limit the development of the wide-temperature sodium storage.This study pioneers a scalable synthesis of hierarchical hollow structural ZIS/C heterostructure through in situ confined growth of ZIS nanosheets in porous hollow carbon spheres(PHCSs)via a hydrothermal method.This unique structure exhibits abundant heterostructures to facilitate charge transport,rich porous structures to promote electrolyte wettability,efficient space utilization to relieve volume expansion,as well as interconnected carbon networks to ensure framework stability.Consequently,ZIS/C exhibits exceptional cycling stability with 92%capacity retention after 1000 cycles.Notably,ZIS/C demonstrates good wide-temperature performance operating at–50∼90°C,especially,at–30°C with a capacity of 208 mA h g^(−1)at 0.3A g^(−1).The full cell of ZIS/C||Na_(3)V_(2)(PO_(4))_(3)exhibits excellent high-rate capability(178 mA h g^(−1)at 6A g^(−1)).
基金supported by the National Key R&D Program of China(Nos.2023YFE0108300 and 2023YFD2202103)the National Natural Science Foundation of China(No.32371972)+2 种基金the Natural Science Foundation of Jiangsu Province,China(No.BK20221336)Jiangsu Agricultural Science and Technology Independent Innovation Fund,China(No.CX(23)3060)Jiangxi Forestry Bureau Forestry Science and Technology Innovation Special Project,China(No.202240).
文摘The rapid development of 5G communication technology and smart electronic and electrical equipment will inevitably lead to electromagnetic radiation pollution.Enriching heterointerface polarization relaxation through nanostructure design and interface modifica-tion has proven to be an effective strategy to obtain efficient electromagnetic wave absorption.Here,this work implements an innovative method that combines biomimetic honeycomb superstructure to constrain hierarchical porous heterostructure composed of Co/CoO nano-particles to improve the interfacial polarization intensity.The method effectively controlled the absorption efficiency of Co^(2+)through de-lignification modification of bamboo,and combined with the bionic carbon-based natural hierarchical porous structure to achieve uniform dispersion of nanoparticles,which is conducive to the in-depth construction of heterogeneous interfaces.In addition,the multiphase struc-ture brought about by high-temperature pyrolysis provides the best dielectric loss and impedance matching for the material.Therefore,the obtained bamboo-based Co/CoO multiphase composite showed excellent electromagnetic wave absorption performance,achieving excel-lent reflection loss(RL)of-79 dB and effective absorption band width of 4.12 GHz(6.84-10.96 GHz)at low load of 15wt%.Among them,the material’s optimal radar cross-section(RCS)reduction value can reach 31.9 dB·m^(2).This work provides a new approach to the micro-control and comprehensive optimization of macro-design of microwave absorbers,and offers new ideas for the high-value utiliza-tion of biomass materials.
