VO₂·0.26H₂O nanobelts@reduced graphene oxides as cathode materials for high-performance aqueous zinc ion batteries

Abstract

A simple microwave-assisted hydrothermal approach is adopted to synthesize VO₂·0.26H₂O nanobelts@reduced graphene oxide (VO₂·0.26H₂O@rGO), which is regarded as a promising cathode material for ZIBs. Compared to VO₂·0.26H₂O, VO₂·0.26H₂O@rGO has a large specific surface area and low charge transfer resistance, improving its electrochemical properties. The large lattice spacing, high capacitive Zn²⁺ storage behavior, fast Zn²⁺ transfer rate and stable structure are also responsible for the performance.