Electronic Conductive Metal–Organic Frameworks for Aqueous Rechargeable Zinc-Ion Battery Cathodes: Design, Progress, and Prospects

Abstract

Zinc-ion batteries (ZIBs) have significant potential for advancements in energy storage systems owing to their high level of safety and theoretical capacity. However, ZIBs face several challenges, such as cathode capacity degradation and short cycle life. Ordinary metal–organic frameworks (MOFs) are characterized by high specific surface areas, large pore channels, and controllable structures and functions, making them suitable for use in ZIB cathodes with good performance. However, the insulating properties of MOFs hinder their further development. In contrast, electronic conductive MOFs (EC-MOFs) show high electronic conductivity, which facilitates rapid electron transport and ameliorates the charging and discharging efficiency of ZIBs. This paper introduces the unique conduction mechanism of EC-MOFs and elaborates various strategies for constructing EC-MOFs with high conductivity and stability. Additionally, the synthesis methods of EC-MOF-based cathode materials and their properties in ZIBs are elucidated. Finally, this paper presents a summary and outlook on the advancements of EC-MOFs for ZIB cathodes. This review provides guidance for designing and applying EC-MOFs in ZIBs and other energy storage devices.