A Bipolar Covalent Organic Framework Cathode Enabling a Six‐Electron Redox Process for Wide‐Temperature Sodium‐Ion Batteries

ABSTRACT Sodium‐ion batteries (SIBs) are promising for large‐scale energy storage because of the natural abundance and low cost of sodium. However, the development of cathodes that combine high redox‐site utilization with prolonged cycling across a wide temperature range remains challenging. Herein, we develop a heteroporous bipolar triphenylamine−benzoquinone covalent organic framework (TPBQ–COF)…