高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

一种新型复合微孔聚合物电解质及其与锂离子电池负极相容性研究

陈作锋, 姜艳霞, 许金梅, 庄全超, 黄令, 董全峰, 孙世刚   

  1. 厦门大学化学化工学院化学系, 固体表面物理化学国家重点实验室, 厦门361005
  • 收稿日期:2005-10-28 修回日期:1900-01-01 出版日期:2006-10-10 发布日期:2006-10-10
  • 通讯作者: 孙世刚

Compatibility of a Novel Composite Microporous Polymer Electrolyte with Anode of Li-ion Batteries

CHEN Zuo-Feng, JIANG Yan-Xia, XU Jin-Mei, ZHUANG Quan-Chao, HUANG Ling, DONG Quan-Feng, SUN Shi-Gang   

  1. State Key Lab for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
  • Received:2005-10-28 Revised:1900-01-01 Online:2006-10-10 Published:2006-10-10
  • Contact: SUN Shi-Gang

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被引次数

5

摘要： 以介孔分子筛SBA-15为造孔剂和填料, 研究出一种无需使用增塑剂制备复合微孔型聚合物电解质(SBA-15 CMPE)的新方法. 组装Li/SBA-15 CMPE/Li对称电池, 并利用电化学阻抗谱(EIS)技术研究了存放时间、循环伏安(CV)扫描、恒电流极化以及环境温度等对Li/SBA-15 CMPE界面性质的影响. 通过将成膜浆料直接浇铸在用水性粘合剂制备的中间相微球碳(MCMB)电极片上, 制备附有SBA-15 CMPE的一体化电极(MCMB/SBA-15 CMPE). 用该MCMB/SBA-15 CMPE所组装的三电极模拟电池具有良好的循环性能, EIS研究揭示了其首次阴极极化过程中碳电极上SEI膜的形成、生长和稳定的过程.

关键词: 锂离子电池, 微孔型聚合物电解质, SBA-15介孔分子筛, 界面性质

Abstract: In this paper, a novel composite microporous polymer electrolyte that is made of poly(vinylidene fluoride-co-hexafluoropropylene)(PVdF-HFP) and mesoporous SBA-15 was prepared(designated as SBA-15 CMPE). Electrochemical impedance spectroscopy(EIS) was applied to investigate the effects of the storage time, cyclic voltammetry(CV) measurement, constant current polarization and ambient temperature on the Li/SBA-15 CMPE interface properties. The polymer film composite integrative electrode(designated as MCMB/SBA-15 CMPE) was prepared through a process that the membrane solution was cast directly on the mesocarbon microbead(MCMB) electrode with water-solubility bond. The result of CV shows that the model cell with three-electrode based on the MCMB/SBA-15 CMPE displayed a good cyclical performance. The EIS result reveals the process of formation, growth and stabilization of solid electrolyte interphase(SEI) film on MCMB/SBA-15 CMPE electrode during the first cathodic polarization.

Key words: Li-ion battery, Microporous polymer electrolyte, Mesoporous SBA-15 molecular sieve, Interface property

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