物理化学学报 >> 2007, Vol. 23 >> Issue (Supp): 51-55.doi: 10.3866/PKU.WHXB2007Supp12

研究论文 上一篇    下一篇

聚3,4-乙撑二氧噻吩对锂离子二次电池正极材料2,5-二巯基-1,3,4-噻二唑的电化学改性

张敬华; 张永生; 郑绵平; 其鲁; 冯波; 李立   

  1. 中信国安盟固利新能源科技有限公司, 北京 102200; 北京大学化学与分子工程学院应用化学系, 新能源材料与技术实验室, 北京 100871; 中国地质科学院矿产资源所, 北京 100037
  • 收稿日期:1900-01-01 修回日期:1900-01-01 发布日期:2008-01-04
  • 通讯作者: 其鲁 E-mail:qilu@pku.edu.cn

2,5-Dimercapto-1,3,4-Thiadiazole for Lithium Batteries by Poly(3,4-ethylenedioxythiophene)

ZHANG Jing-Hua; ZHANG Yong-Sheng; ZHENG Mian-Ping; QI Lu; FENG Bo LI Li   

  1. CITIC GUOAN MGL New Materials and Technology Research Co. Ltd., Beijing 102200, P. R. China; New Energy Material and Technology Laboratory, Department of Applied Chemistry, Department of Applied Chemistry, College of Chemistry&Molecular Engineering, Peking University, Beijing 100871, P. R. China; Institute of Mineral Resources, CAGS, Beijing 100037, P. R. China
  • Received:1900-01-01 Revised:1900-01-01 Published:2008-01-04
  • Contact: QI Lu E-mail:qilu@pku.edu.cn

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摘要： 电聚合物聚3,4-乙撑二氧噻吩(PEDOT)对锂离子电池正极材料2,5-二巯基-1,3,4-噻二唑(DMcT)的氧化还原反应具有很好的电催化性能. 通过掺杂一定量的电催化剂PEDOT, DMcT的电化学性能得到了很大改善. 在包覆有PEDOT的Pt电极上, DMcT的循环伏安实验显示出良好的电化学性能, 表明DMcT的氧化还原反应动力学性能得到了提高. 充放电实验结果表明, 与DMcT膜电极相比, DMcT/PEDOT复合物膜电极显示出了较高的放电容量和较慢的容量衰减.

关键词: 聚3,4-乙撑二氧噻吩, 膜电极, 2,5-二巯基-1,3,4-噻二唑, 电化学催化作用

Abstract: High electrocatalytic activity of an electropolymerized film of poly (3,4-ethylenedioxythiophene) (PEDOT) was reported toward the redox reaction of 2,5-dimercapto-1,3,4-thiadiazole (DMcT) as a promising cathode material for the lithium ion battery. Electrochemical performance of DMcT was improved by adding an appropriate quantity of PEDOT. Cyclic voltammetry showed improved electrochemical performance of DMcT on PEDOT-coated Pt electrode, indicating accelerated redox kinetics. Moreover, charge-discharge tests exhibited higher discharge capacity and slower capacity fading of the PEDOT-doped DMcT composite cathode compared with pure DMcT.

Key words: Poly(3,4-ethylenedioxythiophene), Filmelectrode, 2,5-Dimercapto-1,3,4-thiadiazole, Electrocatalytic effect

MSC2000: 

  • O646