Hydrothermal Synthesis of 3D Porous Structure Bi2WO6/Reduced Graphene Oxide Hydrogels for Enhancing Supercapacitor Performance

Abstract Three‐dimensional (3D) porous Bi 2 WO 6 /reduced graphene oxide hydrogels (BWO/rGO HGs) have been prepared via a facile one‐pot hydrothermal process for supercapacitor applications. Compared with the pristine Bi 2 WO 6 electrode, the 3D porous BWO/rGO HGs exhibit much higher capacitive performances with a specific capacitance of 268.7 F g −1 at a current density of 0.75 A g −1 and good cycling stability with 81% capacitance retention after 1000 cycles at 3 A g −1 . The remarkable electrochemical properties could be attributed to unique architecture of 3D porous rGO HGs supported Bi 2 WO 6 , which provided an excellent electrical conductivity substrate and more channels for ions diffusion. The results indicate that a new synthesis route of 3D porous structure hydrogel loaded binary metal oxide have potential applications in energy storage device.