Preparation and Properties of VO2(B) Doped with Graphene Oxide As Cathode Material for Aqueous Zinc-Ion Batteries

Abstract Aqueous zinc-ion batteries (AZIBs) are recognized for their economical nature, ecological compatibility, and strong safety record. Nevertheless, the task of developing cathode materials that possess both a large capacity and reliable performance remains a formidable issue. Here, we propose using VO2(B) doped with graphene oxide (VO2/GO) as cathode material for AZIBs, prepared via a straightforward hydrothermal method. Graphene oxide significantly improves the rate at which the cathode reacts and allows the cathode to have a high capacity, resulting in a capacity of 542 mA h g–1 at 0.5 A g–1. This study proposes a promising method to enhance the efficiency of cathode materials containing vanadium, hence expediting the advancement of AZIBs.