Fabrication of V3O7•H2O/graphene cathode for high performance zinc-ion batteries

In this paper, V3O7 center dot H2O and V3O7 center dot H2O/Graphene were prepared by hydrothermal synthesis method as cathode materials of aqueous zinc-ion batteries (ZIBs). Compared with bareV(3)O(7)center dot H2O, V3O7 center dot H2O/Graphene cathode material exhibits higher specific capacity (463.4 mAh g(-1) after 100 cycles at 1 A g(-1)), more excellent rate performance and longer cycle life (342.9 mAh g(-1) after 2000 cycles at 10 A g(-1)). The enhanced performance should be ascribed to the improved conductivity of graphene. This work provides a promising cathode material (V3O7 center dot H2O/Graphene) with great advantages and prospects in the field of large-scale energy storage.

Automated summary

In this study, V3O7 center dot H2O and V3O7 center dot H2O/Graphene were prepared as cathode materials for ZIBs. The V3O7 center dot H2O/Graphene cathode material showed higher specific capacity, better rate performance, and longer cycle life, attributed to the improved conductivity of graphene.