合理设计
材料科学
氧化还原
分子工程
阴极
有机自由基电池
电池(电)
共轭体系
化学工程
纳米技术
电极
组合化学
电化学
聚合物
化学
复合材料
物理化学
功率(物理)
工程类
物理
冶金
量子力学
作者
Yong Wu,Yifan Wang,Facai Wei,Tingting Zhang,Wenda Li,Lingyan Huang,Ruijuan Qi,Jianwei Fu,Chengbin Jing,Jiangong Cheng,Shaohua Liu
标识
DOI:10.1016/j.ensm.2023.102993
摘要
Bottom-up molecular engineering by rational design has emerged as a promising strategy for exploring advanced organic cathodes. However, directly programming organic moieties into high-performance electro-active materials remains a great challenge. Herein, we design and synthesize a hydrogen-bonded supramolecule (hexaazatrinaphthalene hexacarbonitrile, HATN-6CN) anchored with abundant cyano groups, which ensures structural stability, extended π-conjugated system, and multiple redox active centers. As a result, the HATN-6CN cathode delivers a high specific capacity (297.6 mAh g–1 at 0.5 A g–1, 225.2 mAh g–1 at 5 A g–1) and outstanding long-term cycling performance (191.9 mAh g–1 over 1000 cycles at 5 A g–1 with a capacity retention of 85.2 %). Moreover, the charge storage mechanisms, structural evolution, and reversibility during the redox process of HATN-6CN were systematically investigated. This work offers a feasible and promising avenue for bottom-up molecular engineering of organic electrodes by rational design.
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