Work

Layered Copper‐Anthraquinone Coordination Polymer Cathode Leveraging Dual‐Redox Sites and Facilitated Ion Diffusion for High‐Performance Lithium‐Ion Batteries

Year: 2026

Type: article

Abstract: ABSTRACT Organic electrode materials often face challenges of low electronic conductivity and high solubility in electrolytes. To address this, we synthesized Cu‐DHAQ, a layered metal‐organic coordination polymer using 1,4‐dihydroxyanthraquinone (DHAQ) as the ligand and Cu 2+ as the metal center. Coordination polymerization effectively suppresses DHAQ dissolution and enhances cycling stability. The extended π‐conjugated framework promotes charge delocalization, improving conductivity, while the layered structure facilitates Li + diffusion. Cu‐DHAQ features dual redox‐active centers (Cu 2+ /Cu + and C═O/C─O − ), enabling a three‐electron transfer reaction. Benefiting from these synergistic effects, the Cu‐DHAQ cathode delivers a high discharge capacity of 260.5 mAh g −1 with 81.2% retention after 100 cycles, and maintains 119.4 mAh g −1 at 0.5 A g −1 . Furthermore, both coin and pouch full cells using Cu‐DHAQ cathode and pre‐lithiated hard carbon (Li‐HC) anode were successfully demonstrated, highlighting its potential as a high‐performance organic cathode material for lithium batteries.

Source: Angewandte Chemie International Edition

DOI: 10.1002/anie.1605227