Enhanced electrochemical performance of vanadium dioxide (B) nanoflowers with graphene nanoribbons support

Abstract

Specific VO₂ (B) nanoflowers and their composite hybridized with graphene nanoribbons (GNRs) are prepared using a moderate H₂C₂O₄ reductant to reduce V₂O₅ with the molar ratio of H₂C₂O₄ : V₂O₅ as 3 : 1. The discharge specific capacities and the cycling stabilities of the VO₂ (B) cathode material for lithium-ion batteries can be improved by graphenes support. In particular, GNRs support can improve the dispersibility and the electrical conductivity of the VO₂ (B) nanoflowers. Thus, VO₂ (B)/GNRs (32.2 wt%) composite exhibits excellent electrochemical performance with the high specific capacity of 471.5 mA h g⁻¹ and the preferable cycling stability.