材料科学
共轭微孔聚合物
电子受体
阴极
接受者
离子
聚合物
氧化还原
电池(电)
共轭体系
微型多孔材料
化学工程
光化学
高分子化学
物理化学
有机化学
化学
复合材料
凝聚态物理
量子力学
冶金
功率(物理)
工程类
物理
作者
Wei Ma,Lian‐Wei Luo,Peihua Dong,Peiyun Zheng,Xiuhua Huang,Chong Zhang,Jia‐Xing Jiang,Yong Cao
标识
DOI:10.1002/adfm.202105027
摘要
Abstract Recent studies have demonstrated that dihydrophenazine (Pz) with high redox‐reversibility and high theoretical capacity is an attractive building block to construct p‐type polymer cathodes for dual‐ion batteries. However, most reported Pz‐based polymer cathodes to date still suffer from low redox activity, slow kinetics, and short cycling life. Herein, a donor–acceptor (D–A) Pz‐based conjugated microporous polymer (TzPz) cathode is constructed by integrating the electron‐donating Pz unit and the electron‐withdrawing 2,4,6‐triphenyl‐1,3,5‐triazine (Tz) unit into a polymer chain. The D–A type structure enhances the polymer conjugation degree and decreases the band gap of TzPz, facilitating electron transportation along the polymer skeletons. Therefore the TzPz cathode for dual‐ion battery shows a high reversible capacity of 192 mAh g −1 at 0.2 A g −1 with excellent rate performance (108 mAh g −1 at 30 A g −1 ), which is much higher than that of its counterpart polymer BzPz produced from 1,3,5‐triphenylbenzene (Bz) and Pz (148 and 44 mAh g −1 at 0.2 and 10 A g −1 , respectively). More importantly, the TzPz cathode also shows a long and stable cyclability of more than 10 000 cycles. These results demonstrate that the D–A structural design is an efficient strategy for developing high‐performance polymer cathodes for dual‐ion batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI