Authors: Hao Zhang, Xiandi Ma, Dong Guo, Menggai Jiao, Yiyang Liu, Yongzheng Fang, Manman Wu, Zhen Zhou
Published: 2025-01-08
Source: Full article
AbstractCovalent organic frameworks (COFs) hold great promise as cathode materials for lithium‐ion batteries (LIBs), but their limited conductivity has hindered broader application. In this study, a novel metallosalen COF (Cu‐TH‐COF) is introduced, synthesized via a one‐pot method, incorporating redox‐active Cu ions into N2O2 pockets and creating an extended π‐d conjugated structure. This design merges organic and inorganic active sites, enabling efficient multi‐electron transfer and improving the utilization of active sites in LIBs. The π‐d conjugation significantly enhances the electronic conductivity, resulting in improved rate performance. As a result, Cu‐TH‐COF delivers an impressive discharge capacity of 300 mAh g−1 at 50 mA g−1 and retains 174 mAh g−1 at 4000 mA g−1, significantly outperforming its Cu‐free counterpart. This study demonstrates for the first time the potential of metallosalen COFs as high‐performance cathode materials and opens up a new strategy for next‐generation LIBs.