Recent progress on modification strategies of both metal zinc anode and manganese dioxide cathode materials for high-performance aqueous zinc-ion batteries

Aqueous zinc-ion batteries (AZIBs) are of the most potential energy storage systems for large-scale applications due to their low redox potential (−0.76 V vs standard hydrogen electrode, SHE), high theoretical specific capacity (820 mA h g⁻¹ and 5855 mA h cm⁻³), safety, low toxicity and price, eco-friendliness and abundant reserves. In spite of many hurdles before their practical application, great progress has been achieved on high-performance AZIBs. In this review, the main issues and their root causes faced by metal zinc anode and manganese dioxide cathode of AZIBs are analyzed, and the recent research progress on the modification strategies and their working mechanisms of both metal zinc anode and manganese dioxide cathode are focused on, and their challenges and future development prospects are also proposed, which provide a perspective for high-performance AZIBs, and further promote their practical process.