材料科学
共轭微孔聚合物
噻吩
阳极
共轭体系
电化学
聚合物
锂(药物)
氧化还原
表面改性
微型多孔材料
化学工程
纳米技术
有机化学
复合材料
电极
物理化学
冶金
化学
内分泌学
工程类
医学
作者
Chong Zhang,Yiliang He,Mu Pan,Xue Wang,Qian He,Yu Chen,Jinghui Zeng,Rui Wang,Yunhua Xu,Jia‐Xing Jiang
标识
DOI:10.1002/adfm.201705432
摘要
Abstract Poly(thiophene) as a kind of n‐doped conjugated polymer with reversible redox behavior can be employed as anode material for lithium‐ion batteries (LIBs). However, the low redox activity and poor rate performance for the poly(thiophene)‐based anodes limit its further development. Herein, a structure‐design strategy is reported for thiophene‐containing conjugated microporous polymers (CMPs) with extraordinary electrochemical performance as anode materials in LIBs. The comparative study on the electrochemical performance of the structure‐designed thiophene‐containing CMPs reveals that high redox‐active thiophene content, highly crosslinked porous structure, and improved surface area play significant roles for enhancing electrochemical performances of the resulting CMPs. The all‐thiophene‐based polymer of poly(3,3′‐bithiophene) with crosslinked structure and a high surface area of 696 m 2 g −1 exhibits a discharge capacity of as high as 1215 mAh g −1 at 45 mA g −1 , excellent rate capability, and outstanding cycling stability with a capacity retention of 663 mAh g −1 at 500 mA g −1 after 1000 cycles. The structure–performance relationships revealed in this work offer a fundamental understanding in the rational design of CMPs anode materials for high performance LIBs.
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