Bi2o2s Nanosheets Decorated Reduced Graphene Oxides as High-Performance Anodes in Aqueous Rechargeable Alkaline Batteries

Development of robust and high-rate anode materials is essential to realize high-performance aqueous rechargeable alkaline batteries (ARABs). Bi-based materials have always been considered as promising anodes due to their large capacity, appropriate negative operating voltage range, and three-electron redox characteristics. Nonetheless, its poor kinetics and low cycling stability have greatly impeded its applications for ARABs. Herein, a unique structural feature of 2D/2D Bi2O2S@rGO nanosheets is synthesized by a one-step hydrothermal method as the anode material for ARABs. The full cell shows a high energy density of 82.91 W h kg-1, high power density of 7.59 kW kg-1, and excellent cycling stability with a capacity retention rate of 92.74% after 5000 cycles. This work opens a new strategy of design environmentally friendly and efficient anode materials.