Polyanion-based materials are considered one of the most attractive and promising cathode materials for lithiumion batteries(LIBs)due to their good stability,safety,cost-effectiveness,suitable voltages,and minimal env...Polyanion-based materials are considered one of the most attractive and promising cathode materials for lithiumion batteries(LIBs)due to their good stability,safety,cost-effectiveness,suitable voltages,and minimal environmental impact.However,these materials suffer from poor rate capability and low-temperature performance owing to limited electronic and ionic conductivity,which restricts their practical applicability.Recent developments,such as coating material particles with carbon or a conductive polymer,crystal deformation through the doping of foreign metal ions,and the production of nanostructured materials,have significantly enhanced the electrochemical performances of these materials.The successful applications of polyanion-based materials,especially in lithium-ion batteries,have been extensively reported.This comprehensive review discusses the current progress in crystal deformation in polyanion-based cathode materials,including phosphates,fluorophosphates,pyrophosphates,borates,silicates,sulfates,fluorosilicates,and oxalates.Therefore,this review provides detailed discussions on their synthesis strategies,electrochemical performance,and the doping of various ions.展开更多
NiFe(oxy)hydroxides nanosheets were synthesized on nickel foams via co-precipitation and electrochemical activation. It is found that the phosphate precursors(Na_(3)PO_(4), Na_(2)HPO_(4)and NaH_(2)PO_(4)) have diverse...NiFe(oxy)hydroxides nanosheets were synthesized on nickel foams via co-precipitation and electrochemical activation. It is found that the phosphate precursors(Na_(3)PO_(4), Na_(2)HPO_(4)and NaH_(2)PO_(4)) have diverse effects on the morphology and thus the oxygen evolution reaction activity of the formed final catalysts. The resulting NiFe(oxy)hydroxides nanosheets prepared with Na_(2)HPO_(4)demonstrate a low overpotential of 205 m V to achieve a current density of 50 mA/cm^(2) with a Tafel slope down to 30 mV/dec in 1 mol/L KOH, and remain stable for 20 h during stability test.展开更多
In recent years,research on self-healing polymers for diverse biomedical applications has surged due to their resemblance to the native extracellular matrix.Here,we introduce a novel self-healing hydrogel scaffold mad...In recent years,research on self-healing polymers for diverse biomedical applications has surged due to their resemblance to the native extracellular matrix.Here,we introduce a novel self-healing hydrogel scaffold made from collagen(Col)and nano-hydroxyapatite(nHA)via a one-pot-synthesis approach under the influence of heating in less than 10 min.Process parameters,including the quantities of Col,guar gum,solvent,nHA,borax,and glycerol in the system were optimized for the minimization of the self-healing time.The synthesized hydrogel and polymers underwent characterization via FTIR,SEM,EDS,TGA,and^(13)C-NMR.Additionally,the hydrogel showed hemocompatibility with only 6.76%hemolysis at 10μg-mL^(-1),while the scaffold maintained cellular metabolic activity at all concentrations for 24 h,with the optimal viability at 1 and 2.5μg-mL^(-1),sustaining 93.5%and 90%viability,respectively.Moreover,the hydrogel scaffold exhibited rapid self-healing within 30 s of damage,alongside a tough and flexible nature,as indicated by its swelling rate,biodegradation under various biological pH solutions,and tensile strength of 0.75 MPa.Hence,the innovative Col and nHA self-healing hydrogel scaffold emerges as an ideal,non-toxic,cost-effective,and easily synthesized material with promising potential in cartilage repair applications.展开更多
Morphotropic phase boundary(MPB)-based ceramics are excellent for energy harvesting due to their enhanced physical properties at phase boundaries,broad operating temperature range,and ability to customize properties f...Morphotropic phase boundary(MPB)-based ceramics are excellent for energy harvesting due to their enhanced physical properties at phase boundaries,broad operating temperature range,and ability to customize properties for efficient conversion of mechanical energy into electrical energy.In this work,Bi_(1–x)Na_(x)Fe_(1–x)Nb_(x)O_(3)(x=0.20,0.30,0.32 and 0.40,BNFNO abbreviation)based ceramics were synthesized using a solid-state route and blended with Polydimethylsiloxane(PDMS)to achieve flexible composites.Various material characterization and energy harvesting were performed by designing a hybrid piezoelectric(PENG)-triboelectric(TENG)device.The voltage and current of PENG,TENG,and hybrid bearing same device area(2 cm×2 cm)were recorded as 11 V/0.3μA;60 V/0.7μA;110 V/2.2μA.The strategies for enhancing the output performance of the hybrid device were evaluated,such as increased surface area(creating micro-roughness and porous morphology)and increasing electrode size and multi-layer hybrid device formation.The self-powered acceleration monitoring was demonstrated using the hybrid device.Further,the low-frequency-based wave energy is converted into electrical energy,confirming the usage of hybrid PENG-TENG devices as a base for battery-free sensors and blue energy harvesting.展开更多
The vaccine is a premier healthcare intervention strategy in the battle against infectious infections.However,the development and production of vaccines present challenges in terms of complexity,cost,and time consumpt...The vaccine is a premier healthcare intervention strategy in the battle against infectious infections.However,the development and production of vaccines present challenges in terms of complexity,cost,and time consumption.Alternative methodologies,such as nonthermal plasma and plant-based technologies,have emerged as potential alternatives for conventional vaccine manufacturing processes.While plasma-based approaches offer a rapid and efficient pathogen inactivation method devoid of harsh reagents,plant-based techniques present a more economically viable and scalable avenue for vaccine production.The imperative urges these approaches to address pressing global health challenges posed by emerging and recurring infectious diseases,surpassing the limitations of traditional vaccine fabrication methods.The primary goal of this review is to provide a comprehensive overview of the current research landscape,covering conceptualization,production,and potential advantages of plasma-based and plant-based vaccines.Furthermore,exploring the obstacles and opportunities intrinsic to these strategies is undertaken,elucidating their potential impact on vaccination strategies.This systematic presentation specifies a detailed outline of recent vaccine research and developments,emphasizing the possibility of advanced green approaches to produce effective and secure vaccination programs.展开更多
We present a new design of a plasmonic Luneburg lens made from a gradient-index metasurface that was constructed with an array of nanometer-sized holes in a dielectric thin film. The fabricated structure consists of a...We present a new design of a plasmonic Luneburg lens made from a gradient-index metasurface that was constructed with an array of nanometer-sized holes in a dielectric thin film. The fabricated structure consists of a planar lens with a diameter of 8.7 μm composed of a rectangular array of holes with a periodicity of 300 nm. The experimental characterization includes leakage-radiation microscopy imaging in the direction and frequency space. The former allows for characterization of the point spread function and phase distribution,whereas the latter grants access to qualitative measurements of the effective mode indices inside the plasmonic lens. The experimental results presented here are in good agreement with the expected average performance predicted by the numerical calculations. Nevertheless, the robustness of the characterization techniques presented here is also exploited to determine deviations from the design parameters.展开更多
文摘Polyanion-based materials are considered one of the most attractive and promising cathode materials for lithiumion batteries(LIBs)due to their good stability,safety,cost-effectiveness,suitable voltages,and minimal environmental impact.However,these materials suffer from poor rate capability and low-temperature performance owing to limited electronic and ionic conductivity,which restricts their practical applicability.Recent developments,such as coating material particles with carbon or a conductive polymer,crystal deformation through the doping of foreign metal ions,and the production of nanostructured materials,have significantly enhanced the electrochemical performances of these materials.The successful applications of polyanion-based materials,especially in lithium-ion batteries,have been extensively reported.This comprehensive review discusses the current progress in crystal deformation in polyanion-based cathode materials,including phosphates,fluorophosphates,pyrophosphates,borates,silicates,sulfates,fluorosilicates,and oxalates.Therefore,this review provides detailed discussions on their synthesis strategies,electrochemical performance,and the doping of various ions.
基金supported by the National Natural Science Foundation of China (Nos. 11904411, 52072308)the Fundamental Research Funds for the Central Universities, China (Nos. 3102021MS0404, 3102019JC001)。
文摘NiFe(oxy)hydroxides nanosheets were synthesized on nickel foams via co-precipitation and electrochemical activation. It is found that the phosphate precursors(Na_(3)PO_(4), Na_(2)HPO_(4)and NaH_(2)PO_(4)) have diverse effects on the morphology and thus the oxygen evolution reaction activity of the formed final catalysts. The resulting NiFe(oxy)hydroxides nanosheets prepared with Na_(2)HPO_(4)demonstrate a low overpotential of 205 m V to achieve a current density of 50 mA/cm^(2) with a Tafel slope down to 30 mV/dec in 1 mol/L KOH, and remain stable for 20 h during stability test.
基金V.K.acknowledges the financial support from the Science and Engineering Research Board(SERB),a statutory body under the Department of Science and Technology,Government of India,for the SIRE Award(SIR/2022/000664)Y.K.M.acknowledges the funding by Interreg Deutschland-Denmark with money from the European Regional Development Fund,project number 096-1.1-18(Access and Acceleration).
文摘In recent years,research on self-healing polymers for diverse biomedical applications has surged due to their resemblance to the native extracellular matrix.Here,we introduce a novel self-healing hydrogel scaffold made from collagen(Col)and nano-hydroxyapatite(nHA)via a one-pot-synthesis approach under the influence of heating in less than 10 min.Process parameters,including the quantities of Col,guar gum,solvent,nHA,borax,and glycerol in the system were optimized for the minimization of the self-healing time.The synthesized hydrogel and polymers underwent characterization via FTIR,SEM,EDS,TGA,and^(13)C-NMR.Additionally,the hydrogel showed hemocompatibility with only 6.76%hemolysis at 10μg-mL^(-1),while the scaffold maintained cellular metabolic activity at all concentrations for 24 h,with the optimal viability at 1 and 2.5μg-mL^(-1),sustaining 93.5%and 90%viability,respectively.Moreover,the hydrogel scaffold exhibited rapid self-healing within 30 s of damage,alongside a tough and flexible nature,as indicated by its swelling rate,biodegradation under various biological pH solutions,and tensile strength of 0.75 MPa.Hence,the innovative Col and nHA self-healing hydrogel scaffold emerges as an ideal,non-toxic,cost-effective,and easily synthesized material with promising potential in cartilage repair applications.
基金This work is supported by Basic Science Research Program through the National Research Foundation of Korea(NRF)(2021R1C1C1011588)funded by the Ministry of Science and ICT of Korea.HJ Kim was supported by the Ministry of Trade,Industry and Energy of Korea(RS-2023-00231350)+2 种基金YKM acknowledges the funding by Interreg Deutschland-Denmark with money from the European Regional Development Fund,project number 096-1.1-18(Access and Acceleration)N.Vittayakorn was funded by KMITL under grant No.KREF11650Z Jagličićwas supported by the Slovenian Research Agency(Grant No.P2-0348).
文摘Morphotropic phase boundary(MPB)-based ceramics are excellent for energy harvesting due to their enhanced physical properties at phase boundaries,broad operating temperature range,and ability to customize properties for efficient conversion of mechanical energy into electrical energy.In this work,Bi_(1–x)Na_(x)Fe_(1–x)Nb_(x)O_(3)(x=0.20,0.30,0.32 and 0.40,BNFNO abbreviation)based ceramics were synthesized using a solid-state route and blended with Polydimethylsiloxane(PDMS)to achieve flexible composites.Various material characterization and energy harvesting were performed by designing a hybrid piezoelectric(PENG)-triboelectric(TENG)device.The voltage and current of PENG,TENG,and hybrid bearing same device area(2 cm×2 cm)were recorded as 11 V/0.3μA;60 V/0.7μA;110 V/2.2μA.The strategies for enhancing the output performance of the hybrid device were evaluated,such as increased surface area(creating micro-roughness and porous morphology)and increasing electrode size and multi-layer hybrid device formation.The self-powered acceleration monitoring was demonstrated using the hybrid device.Further,the low-frequency-based wave energy is converted into electrical energy,confirming the usage of hybrid PENG-TENG devices as a base for battery-free sensors and blue energy harvesting.
基金National Research Foundation of Korea,Grant/Award Numbers:2021R1C1C1013875,2021R1A6A1A03038785,2021R1F1A1055694。
文摘The vaccine is a premier healthcare intervention strategy in the battle against infectious infections.However,the development and production of vaccines present challenges in terms of complexity,cost,and time consumption.Alternative methodologies,such as nonthermal plasma and plant-based technologies,have emerged as potential alternatives for conventional vaccine manufacturing processes.While plasma-based approaches offer a rapid and efficient pathogen inactivation method devoid of harsh reagents,plant-based techniques present a more economically viable and scalable avenue for vaccine production.The imperative urges these approaches to address pressing global health challenges posed by emerging and recurring infectious diseases,surpassing the limitations of traditional vaccine fabrication methods.The primary goal of this review is to provide a comprehensive overview of the current research landscape,covering conceptualization,production,and potential advantages of plasma-based and plant-based vaccines.Furthermore,exploring the obstacles and opportunities intrinsic to these strategies is undertaken,elucidating their potential impact on vaccination strategies.This systematic presentation specifies a detailed outline of recent vaccine research and developments,emphasizing the possibility of advanced green approaches to produce effective and secure vaccination programs.
基金Consejo Nacional de Ciencia y Tecnologia(250719,252621,2417,461).
文摘We present a new design of a plasmonic Luneburg lens made from a gradient-index metasurface that was constructed with an array of nanometer-sized holes in a dielectric thin film. The fabricated structure consists of a planar lens with a diameter of 8.7 μm composed of a rectangular array of holes with a periodicity of 300 nm. The experimental characterization includes leakage-radiation microscopy imaging in the direction and frequency space. The former allows for characterization of the point spread function and phase distribution,whereas the latter grants access to qualitative measurements of the effective mode indices inside the plasmonic lens. The experimental results presented here are in good agreement with the expected average performance predicted by the numerical calculations. Nevertheless, the robustness of the characterization techniques presented here is also exploited to determine deviations from the design parameters.
