聚吡咯
蒽醌
电化学
锂(药物)
聚合
材料科学
有机自由基电池
吡咯
氧化还原
阴极
电解质
无机化学
化学工程
溶解
化学
聚合物
电极
有机化学
复合材料
物理化学
内分泌学
工程类
医学
作者
Chaoxu Ye,Xin Zhang,Ying Wang,Meng Qin,Yanjun Shi,Zhidong Chen,Wenchang Wang,Jianyu Cao,Juan Xu
标识
DOI:10.1002/ente.202101140
摘要
Anthraquinone and its derivatives show compelling electrochemical activities in lithium‐ion batteries due to their abundant redox‐active carbonyl groups and desirable π ‐conjugated structures. However, anthraquinone‐based compounds often suffer from inferior material utilization, a low‐capacity retention rate, and short cycle life due to poor conductivities and unexpected dissolution properties in supporting electrolytes during the charge/discharge cycles. To solve these problems, a novel grafted polymer, poly(N‐anthraquinoyl pyrrole) (e‐PAQPy), containing redox‐active anthraquinone subunits and conductive polypyrrole groups, is prepared by an electrochemical polymerization method and employed as the cathode material for organic lithium‐ion batteries. Polypyrrole backbone chain in e‐PAQPy is utilized both to bring into high electronic conductivity and to decrease the solubility of the anthraquinone subunits. As expected, the e‐PAQPy exhibits a high specific capacity (196.2 mAh g −1 at 0.1 C), good rate performance (70.8 mAh g −1 at 3 C), and long cycle stability (79% of the initial capacity after 500 cycles).
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