Advanced covalent-organic framework materials for sodium-ion battery

Rechargeable sodium-ion batteries (SIBs), being one of the most prominent electrochemical energy storage devices, have garnered significant attention owing to their abundant metal Na resources, cost-effectiveness, and high safety coefficient. Recently, advanced covalent organic frameworks (COFs) have emerged as popular electrode materials in SIBs due to their superior energy-storage performance, including high energy density and long cycle stability, etc. In this review, the recent advancements and obstacles in the field of COFs-based SIBs have been comprehensively summarized. Then, the advantages and working mechanisms of COF electrodes in SIB materials are particularly analyzed. Additionally, a range of modification strategies for COFs are provided to enhance the performance of SIB cells. Finally, the range of rechargeable batteries based on novel COF materials has also been extended to include some other types. This work not only provides a novel entry point for organic energy-storage electrode materials, but also offers an in-depth analysis of the structure-property relationship to facilitate the advancement of COFs-related SIBs.