An Anti-Aromatic Covalent Organic Framework Cathode with Dual-Redox Centers for Rechargeable Aqueous Zinc Batteries

• DOI: 10.1021/acsami.2c08170
• Publication Date: 2022-08-17T10:20:11Z
• Authors: Zirui Lin; Lu Lin; Jiaqi Zhu; Wanlong Wu; Xianpeng Yang; Xiaoqi Sun
• Keywords: Covalent organic framework

Covalent organic frameworks (COFs) are promising cathode candidates with high structural stability. However, they contain redox inactive linkages and experience low potential. Herein, a full anti-aromatic microporous COF material of TAQ-BQ is designed for aqueous zinc batteries. The conjugation effectively lowers the energy level lowest unoccupied molecular orbital as revealed by theoretical calculations, which corresponds to an elevated Besides, structure contains imino active sites at linkages, in addition carbonyl parts. As result, exhibits voltage 1.53 V/1.54 V between 1.35 0.45 cells. It delivers 208 mAh g–1 capacity 0.1 A maintains 136 2 g–1. Stable cycling realized 1000 cycles 87% retention. co-de/insertion Zn2+ protons identified storage. Our work reveals promises materials