Metal/covalent organic frameworks for aqueous rechargeable zinc-ion batteries

Lithium-ion batteries (LIBs) have become one of the most successful energy storage systems due to their high operating voltage, high energy density, and long cycle life. However, with the widespread use of LIBs in recent decades, lithium resources are at risk of being exhausted. Therefore, it is necessary to find a substitute for LIBs to meet the needs of future large-scale energy storage systems. Because of their competitiveness, low cost, and high safety, aqueous rechargeable zinc-ion batteries (ARZIBs) are regarded as promising components in the post-lithium-ion-battery era. Given the tunable composition, ordered porous channels, and controllable structure of metal-organic frameworks (MOFs) and covalent organic frameworks (COFs), these frameworks are viewed as potential materials for developing high-performance ARZIBs. In this review, we focus on the recent developments in the applications of MOF-/COF-based materials in ARZIBs, including in electrode materials, anode modifications, separators, and solid electrolytes. We then focus on the critical factors and optimization techniques of MOF-/COF-based materials that affect the performance of ARZIBs. Finally, we conclude with some projections for the expansion of ARZIBs containing MOF-/COF-based materials. © 2023, Science China Press.