Abstract
A highly flexible hydrogel cathode applied in rechargeable aqueous zinc-ion batteries (ZIBs) fabricated by polyvinyl alcohol (PVA), vanadium pentoxide (V2O5) and graphene oxide (GO) has been successfully synthesized by repeated freeze-thaw method. The V2O5/GO hydrogel (VOGH) presented complex 3D cross-linking system and excellent flexibility through hydrogen bonding and inorganic nanosheets reinforcement. The mechanical and electrochemical properties of VOGH are balanced and achieved by adjusting the content of GO (5%), V2O5 (30%), PVA (25%) and water (40%) of the total mass, respectively. From the electrochemical result, the flexible hydrogel cathode displayed a high capacity (240.5 mA h g–1) and a good cyclic stability after 200 cycles at 1 A g–1. Moreover, the electrochemical kinetics exhibite the capacitive control process, which confirm the excellent ion transport to enhance storage performance of ZIBs. The soft package ZIBs using VOGH as cathode and Zn foil as anode display good cycle performance (191.7 mA h g–1 at 1 A g–1 after 1000 cycles) and provide stable power supply at different bending angles.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
