Application of metal organic frameworks (MOFs) and their derivatives in the cathode materials of aqueous zinc-ion batteries

Abstract

Aqueous zinc-ion batteries (AZIBs) have been the focus of secondary rechargeable battery research because of their high theoretical specific capacity, safety, and environmental friendliness. However, an ideal cathode material remains a primary challenge in the commercialization of aqueous zinc-ion batteries. Due to their low cost and large theoretical specific capacity, manganese-based cathode materials exhibit low conductivity and slow ion diffusion kinetics. Similarly, vanadium-based materials offer a high theoretical specific capacity but suffer from structural instability. Metal–organic frameworks (MOFs) offer adjustable structures, high porosities, and high specific surface areas and are used in energy storage. Recent studies have explored MOFs and their derivatives as positive electrode materials for AZIBs, demonstrating significant improvements in their electrochemical performance and cathode stability. This paper reviews the research progress on MOFs and their derivatives as cathode materials for aqueous zinc-ion batteries and discusses the application prospects and future challenges of MOFs and their derivatives in this context.