Supercapacitors have attracted significant attention as a promising energy storage technology due to their high power density and rapid charge-discharge capabilities.In this study,we synthesized bismuth vanadate(BiVO_...Supercapacitors have attracted significant attention as a promising energy storage technology due to their high power density and rapid charge-discharge capabilities.In this study,we synthesized bismuth vanadate(BiVO_(4))with varying molar ratios using the sol-gel combustion method and evaluated their effectiveness as supercapacitor electrodes.Crystallographic and morphological analyses confirmed the formation of nanoparticles with different phases.The vanadium-rich BiVO_(4)compound electrode exhibited a maximum specific capacitance of 893 F·g^(-1)at a current density of 0.5 A·g^(-1)and demonstrated superior rate capability.Additionally,an all-solid-state asymmetric supercapacitor,fabricated using vanadium-rich BiVO_(4)and activated carbon along with a gel electrolyte,achieved an energy density of 6.66 Wh·kg^(-1)at a power density of 600 W·kg^(-1)and sustained 86%capacitance retention after 10000 cycles.These results highlight the potential of Bi-V compounds in energy storage applications.展开更多
基金Supporting Project Number(RSP2025R348),King Saud University,Riyadh,Saudi Arabia.The author PEL thankful to ANID for the FONDECYT fellowship(#3230388)under ANID,CHILE for the financial support the FONDECYT#11220335.
文摘Supercapacitors have attracted significant attention as a promising energy storage technology due to their high power density and rapid charge-discharge capabilities.In this study,we synthesized bismuth vanadate(BiVO_(4))with varying molar ratios using the sol-gel combustion method and evaluated their effectiveness as supercapacitor electrodes.Crystallographic and morphological analyses confirmed the formation of nanoparticles with different phases.The vanadium-rich BiVO_(4)compound electrode exhibited a maximum specific capacitance of 893 F·g^(-1)at a current density of 0.5 A·g^(-1)and demonstrated superior rate capability.Additionally,an all-solid-state asymmetric supercapacitor,fabricated using vanadium-rich BiVO_(4)and activated carbon along with a gel electrolyte,achieved an energy density of 6.66 Wh·kg^(-1)at a power density of 600 W·kg^(-1)and sustained 86%capacitance retention after 10000 cycles.These results highlight the potential of Bi-V compounds in energy storage applications.
