High-performance aqueous zinc batteries enabled by amorphous nickel sulfide materials

Aqueous zinc battery has the advantages of high-safety, environmental-friendly and high capacity, and enables them as a promising candidate of energy storage. However, the specific capacity, rate performance and the cycling stability of cathodes are of still great challenges for the commercialized application compared to the zinc anode. Here, an amorphous nickel sulfide (ANS) is synthesized via facile electrodeposition with the assistance of thioacetamide (TAA), which is directly treated as the high performance cathode for aqueous zinc battery. As a result, the ANS electrode exhibits a high reversible specific capacity of 350 mAh/g at 1 A/g. The full cell of ANS//Zn delivers a high capacity of 140 mAh/g at 1 A/g. It provides a new candidate material for alkaline aqueous zinc battery.