Lithium-sulfur batteries(LSBs)are a promising candidate for next-generation energy storage solutions.However,challenges such as the shuttling effect and sluggish Li-S reaction kinetics of lithium polysulfides hinder t...Lithium-sulfur batteries(LSBs)are a promising candidate for next-generation energy storage solutions.However,challenges such as the shuttling effect and sluggish Li-S reaction kinetics of lithium polysulfides hinder their practical application.In this work,we present a mixed-phase heterostructure comprising Co_(0.85)Se and MoSe_(2),supported on nitrogen-doped carbon polyhedrons(NCP),as an effective sulfur host in the LSB cathode.Through a combination of theoretical calculations and experimental validation,we demonstrate that the Co_(0.85)Se-MoSe_(2)heterointerface significantly enhances electron transfer efficiency,thereby boosting the overall reaction kinetics of the sulfur cathode.As a result,the Co_(0.85)Se-MoSe_(2)/NCP/S electrodes exhibit initial specific capacities exceeding 1500 mAh g^(-1)at 0.1 C and retain 666 m Ah g^(-1)at 3 C,with a capacity fade rate of 0.044%per cycle over 500 cycles at 1.0 C.Notably,even at a high sulfur loading of 3 mg cm^(-2)and a reduced electrolyte volume of 6.7μL mgS^(-1),the Co_(0.85)SeMoSe_(2)/NCP/S electrodes maintain a capacity of 432 mAh g^(-1)after 100 cycles at 0.2 C.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
We study the emergence of non-Fermi liquid on heterostructure interfaces where there exists an infinite number of critical boson modes accounting for the magnetic fluctuations in two spatial dimensions.The interfacial...We study the emergence of non-Fermi liquid on heterostructure interfaces where there exists an infinite number of critical boson modes accounting for the magnetic fluctuations in two spatial dimensions.The interfacial Dzyaloshinskii-Moriya interaction naturally arises in magnetic interactions due to the absence of inversion symmetry,resulting in a degenerate contour for the low-energy bosonic modes in the momentum space which simultaneously becomes critical near the magnetic phase transition.The itinerant electrons are scattered by the critical boson contour via the Yukawa coupling.When the boson contour is much smaller than the Fermi surface,it is shown that,there exists a regime with a dynamic critical exponent z=3 while the boson contour still controls the low-energy magnetic fluctuations.Using a self-consistent renormalization calculation for this regime,we uncover a prominent non-Fermi liquid behavior in the resistivity with a characteristic temperature scaling power.These findings open up new avenues for understanding boson-fermion interactions and the novel fermionic quantum criticality.展开更多
We report an experimental study of electron transport properties of MnSe/(Bi,Sb)_(2)Te_(3) heterostructures,in which MnSe is an antiferromagnetic insulator,and(Bi,Sb)_(2)Te_(3) is a three-dimensional topological insul...We report an experimental study of electron transport properties of MnSe/(Bi,Sb)_(2)Te_(3) heterostructures,in which MnSe is an antiferromagnetic insulator,and(Bi,Sb)_(2)Te_(3) is a three-dimensional topological insulator(TI).Strong magnetic proximity effect is manifested in the measurements of the Hall effect and longitudinal resistances.Our analysis shows that the gate voltage can substantially modify the anomalous Hall conductance,which exceeds 0.1 e^(2)/h at temperature T=1.6 K and magnetic field _(μ0)H=5 T,even though only the top TI surface is in proximity to MnSe.This work suggests that heterostructures based on antiferromagnetic insulators provide a promising platform for investigating a wide range of topological spintronic phenomena.展开更多
Cobalt hydroxide nanosheet is among the most popular oxygen evolution reaction(OER)catalyst yet still suffers from sluggish catalytic kinetics,limited activity,and poor stability.Here,an efficient in situ electrochemi...Cobalt hydroxide nanosheet is among the most popular oxygen evolution reaction(OER)catalyst yet still suffers from sluggish catalytic kinetics,limited activity,and poor stability.Here,an efficient in situ electrochemical reconstructed CoFe-hydroxides derived OER electrocatalyst was reported.The introduction of Fe promoted the transformation of Co^(2+)into Co^(3+)in CoFehydroxides nanosheet,along with the formation of abundant amorphous/crystalline interfaces.Thanks for the retained nanosheet microstructure,high valence Co^(3+)and Fe^(3+)species,and the amorphous/crystalline heterostructure interfaces,the as-designed electrochemical reconstructed CoFeOOH nanosheet/Ni foam(CoFeOOHNS/NF)electrode delivers 100 mA·cm^(−2) in alkaline at an overpotential of 275 mV and can stably electrocatalyze water oxidation for at least 35 h at 100 mA·cm^(−2).Meanwhile,the alkaline full water splitting electrolyzer achieves a current density of 10 mA·cm^(−2) only at 1.522 V for CoFeOOHNS/NF‖Pt/C/NF,which is much lower than that of Ru/C/NF‖Pt/C/NF(1.655 V@10 mA·cm^(−2)).This work paves the way for in-situ synergetic modification engineering of electrochemical active components.展开更多
As promising energy-storage devices,zinc-air batteries(ZABs)exhibit slow reaction kinetics for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)occurring at their electrodes.High-performance bifunctiona...As promising energy-storage devices,zinc-air batteries(ZABs)exhibit slow reaction kinetics for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)occurring at their electrodes.High-performance bifunctional catalysts must thus be synthesized to accelerate the reversible conversion of oxygen and improve the rate and overall performance of ZABs.Herein,we reported the promising prospects of self-supported composite electrodes composed of wood-derived carbon(WDC)and bimetallic cobalt-iron alloys/oxides(CoFe-CoFe_(2)O_(4)@WDC)as efficient electrocatalysts for alkaline ORR/OER.WDC provided a favorable three-phase interface for heterogeneous reactions owing to its layered porous structure and genetic stability,thereby enabling mass diffusion and improving reaction kinetics.The CoFe_(2)O_(4)spinel surface was reduced to bimetallic CoFe alloy to form abundant heterostructure interfaces that promote electron transfer.Under alkaline conditions,the optimized composite electrode exhibited a remarkable high half-wave potential of 0.85 V and an exceptionally low overpotential of 1.49 V.It also exhibited stable performance over an impressive 2340 cycles in a ZAB.Theoretical calculations also confirmed that the heterointerface addresses the issue of proton scarcity throughout the reaction and actively facilitates the creation of O-O bonds during the reversible transformation of oxygen.This study introduces a new concept for developing bifunctional and efficient electrocatalysts based on charcoal and encourages the sustainable and high-value use of forest biomass resources.展开更多
Although the performance of the self-standing electrode has been enhanced for aqueous zinc-ion batteries(AZIBs),it is necessary to explore and analyse the deep modification mechanism(especially interface effects).Here...Although the performance of the self-standing electrode has been enhanced for aqueous zinc-ion batteries(AZIBs),it is necessary to explore and analyse the deep modification mechanism(especially interface effects).Herein,density functional theory(DFT)calculations are applied to investigate the high-performance cathode based on the VO_(2)/carbon cloth composites with heterostructures interface(H-VO_(2)@CC).The adsorption energy comparisons and electron structure analyses verify that HVO_(2)@CC has extra activated sites at the interface,enhanced electrical conductivity,and structural stability for achieving highperformance AZIBs due to the presence of built-in electric field at the interfaces.Accordingly,the designed self-standing HVO_(2)@CC cathode delivers higher rate capacity,longer-life cyclability,and faster electronic/ion transmission kinetics benefiting from the synergistic effects.The risks of active material shedding and dissolution during the dis/charge process of two cathodes were evaluated via ex-situ ultraviolet–visible(UV–vis)spectrum and inductively coupled plasma-atomic emission spectroscopy(ICP-AES)technique.Finally,this investigation also explores the charge storage mechanism of H-VO_(2)@CC through various exsitu and in-situ characterization techniques.This finding can shed light on the significant potential of heterostructures interface engineering in practical applications and provide a valuable direction for the development of cathode materials for AZIBs and other metal-ion batteries.展开更多
The zinc(Zn)batteries have challenges include uncontrollable dendritic growth,unreasonable negative to positive ratio and limited areal capacity.This highlight presents the latest development to resolve the uncontroll...The zinc(Zn)batteries have challenges include uncontrollable dendritic growth,unreasonable negative to positive ratio and limited areal capacity.This highlight presents the latest development to resolve the uncontrollable Zn dendrite formation at high areal capacities of 200 mAh·cm^(-2) through a two-dimensional metal/metal-Zn alloy heterostructured interface.The anode-free Zn batteries with an attractive and practical pouch cell energy density of 62 Wh·kg^(-1) enlighten an arena towards their commercialization.展开更多
基金support from the 2BoSS project of the ERA-MIN3 program with the Spanish grant number PCI2022-132985/AEI/10.13039/501100011033funding from the Generalitat de Catalunya 2021SGR01581 and 2021SGR00457+9 种基金the European Union NextGenerationEU/PRTR,the Natural Science Foundation of Chongqing(No.2023NSCQ-MSX1669)the Science and Technology Research Program of Chongqing Municipal Education Commission(No.KJZDK202401110)support of the Supercomputing Center of Lanzhou University,Chinasupported by MCIN with funding from European Union NextGenerationEU(PRTR-C17.I1)by Generalitat de Catalunya(In-CAEM Project)support from the project AMaDE(PID2023-149158OB-C43)funded by MCIN/AEI/10.13039/501100011033/funding from the CSC-UAB PhD scholarship programfunding from Grant IU16-014206(METCAM-FIB)funded by the European Union through the European Regional Development Fund(ERDF)support of the Ministry of Research and Universities,Generalitat de Catalunya。
文摘Lithium-sulfur batteries(LSBs)are a promising candidate for next-generation energy storage solutions.However,challenges such as the shuttling effect and sluggish Li-S reaction kinetics of lithium polysulfides hinder their practical application.In this work,we present a mixed-phase heterostructure comprising Co_(0.85)Se and MoSe_(2),supported on nitrogen-doped carbon polyhedrons(NCP),as an effective sulfur host in the LSB cathode.Through a combination of theoretical calculations and experimental validation,we demonstrate that the Co_(0.85)Se-MoSe_(2)heterointerface significantly enhances electron transfer efficiency,thereby boosting the overall reaction kinetics of the sulfur cathode.As a result,the Co_(0.85)Se-MoSe_(2)/NCP/S electrodes exhibit initial specific capacities exceeding 1500 mAh g^(-1)at 0.1 C and retain 666 m Ah g^(-1)at 3 C,with a capacity fade rate of 0.044%per cycle over 500 cycles at 1.0 C.Notably,even at a high sulfur loading of 3 mg cm^(-2)and a reduced electrolyte volume of 6.7μL mgS^(-1),the Co_(0.85)SeMoSe_(2)/NCP/S electrodes maintain a capacity of 432 mAh g^(-1)after 100 cycles at 0.2 C.
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funding provided by Shanghai Jiao Tong Universitysupported by the National Science Foundation of China with Grant No.92065203+2 种基金the Ministry of Science and Technology of China with Grants No.2018YFE0103200by the Shanghai Municipal Science and Technology Major Project with Grant No.2019SHZDZX04by the Research Grants Council of Hong Kong with General Research Fund Grant No.17306520.
文摘We study the emergence of non-Fermi liquid on heterostructure interfaces where there exists an infinite number of critical boson modes accounting for the magnetic fluctuations in two spatial dimensions.The interfacial Dzyaloshinskii-Moriya interaction naturally arises in magnetic interactions due to the absence of inversion symmetry,resulting in a degenerate contour for the low-energy bosonic modes in the momentum space which simultaneously becomes critical near the magnetic phase transition.The itinerant electrons are scattered by the critical boson contour via the Yukawa coupling.When the boson contour is much smaller than the Fermi surface,it is shown that,there exists a regime with a dynamic critical exponent z=3 while the boson contour still controls the low-energy magnetic fluctuations.Using a self-consistent renormalization calculation for this regime,we uncover a prominent non-Fermi liquid behavior in the resistivity with a characteristic temperature scaling power.These findings open up new avenues for understanding boson-fermion interactions and the novel fermionic quantum criticality.
基金Supported by the National Key Research and Development Program of China (Grant No.2016YFA0300600)the National Natural Science Foundation of China (Grant No.11961141011)the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB28000000)。
文摘We report an experimental study of electron transport properties of MnSe/(Bi,Sb)_(2)Te_(3) heterostructures,in which MnSe is an antiferromagnetic insulator,and(Bi,Sb)_(2)Te_(3) is a three-dimensional topological insulator(TI).Strong magnetic proximity effect is manifested in the measurements of the Hall effect and longitudinal resistances.Our analysis shows that the gate voltage can substantially modify the anomalous Hall conductance,which exceeds 0.1 e^(2)/h at temperature T=1.6 K and magnetic field _(μ0)H=5 T,even though only the top TI surface is in proximity to MnSe.This work suggests that heterostructures based on antiferromagnetic insulators provide a promising platform for investigating a wide range of topological spintronic phenomena.
基金support from the National Key Research and Development Program of China(No.2020YFB1506300)the National Natural Science Foundation of China(Nos.21625102,21971017,21922502,22075018,51991344,52025025,and 52072400)+1 种基金Beijing Institute of Technology Research Fund Program,The Natural Science Foundation of Hainan Province(No.2019RC166)Beijing Natural Science Foundation(No.Z190010).
文摘Cobalt hydroxide nanosheet is among the most popular oxygen evolution reaction(OER)catalyst yet still suffers from sluggish catalytic kinetics,limited activity,and poor stability.Here,an efficient in situ electrochemical reconstructed CoFe-hydroxides derived OER electrocatalyst was reported.The introduction of Fe promoted the transformation of Co^(2+)into Co^(3+)in CoFehydroxides nanosheet,along with the formation of abundant amorphous/crystalline interfaces.Thanks for the retained nanosheet microstructure,high valence Co^(3+)and Fe^(3+)species,and the amorphous/crystalline heterostructure interfaces,the as-designed electrochemical reconstructed CoFeOOH nanosheet/Ni foam(CoFeOOHNS/NF)electrode delivers 100 mA·cm^(−2) in alkaline at an overpotential of 275 mV and can stably electrocatalyze water oxidation for at least 35 h at 100 mA·cm^(−2).Meanwhile,the alkaline full water splitting electrolyzer achieves a current density of 10 mA·cm^(−2) only at 1.522 V for CoFeOOHNS/NF‖Pt/C/NF,which is much lower than that of Ru/C/NF‖Pt/C/NF(1.655 V@10 mA·cm^(−2)).This work paves the way for in-situ synergetic modification engineering of electrochemical active components.
基金funded by the Tianchi Talent Training Program(No.2023000061)the Jiangsu Key Lab of Biomass Energy and Material(No.JSBEM-S-202101)+1 种基金the Young Top Talent Program of Zhongyuan-Yingcai-Jihua(No.30602674)the National Natural Science Foundation of China(No.31901272).
文摘As promising energy-storage devices,zinc-air batteries(ZABs)exhibit slow reaction kinetics for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)occurring at their electrodes.High-performance bifunctional catalysts must thus be synthesized to accelerate the reversible conversion of oxygen and improve the rate and overall performance of ZABs.Herein,we reported the promising prospects of self-supported composite electrodes composed of wood-derived carbon(WDC)and bimetallic cobalt-iron alloys/oxides(CoFe-CoFe_(2)O_(4)@WDC)as efficient electrocatalysts for alkaline ORR/OER.WDC provided a favorable three-phase interface for heterogeneous reactions owing to its layered porous structure and genetic stability,thereby enabling mass diffusion and improving reaction kinetics.The CoFe_(2)O_(4)spinel surface was reduced to bimetallic CoFe alloy to form abundant heterostructure interfaces that promote electron transfer.Under alkaline conditions,the optimized composite electrode exhibited a remarkable high half-wave potential of 0.85 V and an exceptionally low overpotential of 1.49 V.It also exhibited stable performance over an impressive 2340 cycles in a ZAB.Theoretical calculations also confirmed that the heterointerface addresses the issue of proton scarcity throughout the reaction and actively facilitates the creation of O-O bonds during the reversible transformation of oxygen.This study introduces a new concept for developing bifunctional and efficient electrocatalysts based on charcoal and encourages the sustainable and high-value use of forest biomass resources.
基金This work was financially supported by the Innovation and Entrepreneurship Training Program for College Students(No.S202110500041)the National Natural Science Foundation of China(No.51771071).
文摘Although the performance of the self-standing electrode has been enhanced for aqueous zinc-ion batteries(AZIBs),it is necessary to explore and analyse the deep modification mechanism(especially interface effects).Herein,density functional theory(DFT)calculations are applied to investigate the high-performance cathode based on the VO_(2)/carbon cloth composites with heterostructures interface(H-VO_(2)@CC).The adsorption energy comparisons and electron structure analyses verify that HVO_(2)@CC has extra activated sites at the interface,enhanced electrical conductivity,and structural stability for achieving highperformance AZIBs due to the presence of built-in electric field at the interfaces.Accordingly,the designed self-standing HVO_(2)@CC cathode delivers higher rate capacity,longer-life cyclability,and faster electronic/ion transmission kinetics benefiting from the synergistic effects.The risks of active material shedding and dissolution during the dis/charge process of two cathodes were evaluated via ex-situ ultraviolet–visible(UV–vis)spectrum and inductively coupled plasma-atomic emission spectroscopy(ICP-AES)technique.Finally,this investigation also explores the charge storage mechanism of H-VO_(2)@CC through various exsitu and in-situ characterization techniques.This finding can shed light on the significant potential of heterostructures interface engineering in practical applications and provide a valuable direction for the development of cathode materials for AZIBs and other metal-ion batteries.
文摘The zinc(Zn)batteries have challenges include uncontrollable dendritic growth,unreasonable negative to positive ratio and limited areal capacity.This highlight presents the latest development to resolve the uncontrollable Zn dendrite formation at high areal capacities of 200 mAh·cm^(-2) through a two-dimensional metal/metal-Zn alloy heterostructured interface.The anode-free Zn batteries with an attractive and practical pouch cell energy density of 62 Wh·kg^(-1) enlighten an arena towards their commercialization.
