Synthesis and electrochemical properties of polypyrrole-coated poly(2,5-dimercapto-1,3,4-thiadiazole)
Synthesis and electrochemical properties of polypyrrole-coated poly(2,5-dimercapto-1,3,4-thiadiazole)
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DOI：
10.1016/s1388-2481(03)00121-8
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发表时间：
2003-07-01
影响因子：
5.4
通讯作者：
Zhou, YH
中科院分区：
文献类型：
--
作者：
Li, JX;Zhan, H;Zhou, YH
采用表面活性剂模板法（TFST）制备了导电聚吡咯（PPy）包覆聚（2，5-二巯基-1，3，4-噻二唑）（PDMcT）复合正极活性材料薄膜。通过红外光谱（FT-IR）和透射电子显微镜（TEM）证实了在PDMCT颗粒表面形成了均匀且连接良好的膜。循环伏安和恒流充放电测试表明，包覆复合材料的电化学性能优于PDMcT，如氧化还原过程增强、库仑效率提高等，其电导率达到10（-3）S cm（-1），首次放电容量达到250 mAhg（-1）。此外，当用作具有液体电解质溶液的二次锂电池中的阴极材料时，其显示出比PDMcT更慢的放电容量衰减。(C)2003 Elsevier Science B. V.保留所有权利。
A new composite cathode active material, conductive polypyrrole (PPy)-coated poly(2,5-dimercapto-1,3,4-thiadiazole) (PDMcT) was prepared as a thin film via the surfactant template (TFST) technique. The formation of the uniform and well-connected film on the surface of PDMcT particles was confirmed by Fourier transform infrared spectra (FT-IR) and transmission electron micrographs (TEM). By cyclic voltammetry and galvanostatic charge-discharge tests, the coated composite showed a better electrochemical performance than PDMcT, such as enhanced redox processes and improved coulumbic efficiency, etc. The electrical conductivity of the material reached to 10(-3) S cm(-1) and an initial discharge capacity of 250 mAhg(-1) was obtained. Moreover, it showed a slower fading of discharge capacity than PDMcT when used as cathode material in secondary lithium batteries with liquid electrolyte solution. (C) 2003 Elsevier Science B.V. All rights reserved.