A Br-Doped BiOCl Cathode for High-Performance Aqueous Zinc-Ion Battery

Aqueous zinc ion batteries (AZIBs) have great research value and development prospects for their advantages of low price and high security. Nevertheless, because of the radius of zinc ion is large, it is difficult for zinc ions to be embedded in the cathode electrode material, affecting the performance. So, the research of semblable positive electrode materials is most important step to the real application of AZIBs. A composite material was prepared in this paper, Br-doped BiOCl was designed. The cathode has excellent performance and a specific discharge capacity of 640 mAh g−1 at 0.1 A g−1. Thus, a new type of zinc ion cathode material has been developed.