Mesoporous Polyimide‐Linked Covalent Organic Framework with Multiple Redox‐Active Sites for High‐Performance Cathodic Li Storage

HATN-AQ-COF achieves a high reversible capacity of 319 mAh/g at 0.5 C with an active site utilization of 89%.

• Covalent organic frameworks (COFs) are explored as renewable materials for Li-ion battery cathodes.
• The newly developed HATN-AQ-COF features multiple redox-active sites for Li-ion storage.
• HATN-AQ-COF demonstrates excellent stability, good conductivity, and a large pore size of 3.8 nm.
• The combination of stable and fast ion transport with abundant redox active sites contributes to its performance.
• HATN-AQ-COF represents one of the best performances among existing COF electrodes.

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