改性LiClO_4－（PEO）_（20）电解质锂离子迁移数的测定

电化学（中英文） ›› 1996, Vol. 2 ›› Issue (1): 41-46.

改性LiClO_4－（PEO）_（20）电解质锂离子迁移数的测定

周如琪，刘庆国，仇卫华，张蕴，赵月娥，杨蕾玲

北京科技大学，化工部北京化工研究院

收稿日期:1996-02-28 修回日期:1996-02-28 出版日期:1996-02-28 发布日期:1996-02-28

Determination of Transport Number of the Modified LiClO_4- (PEO)_(20) Polymer Electrolyte

Zhou Ruqi; Liu Qngguo; Qiu Weihua; Zhang Yun; Zhao Yuee

(University of Science and Technology Beijing, Bijing, 100083)Yang Leiling (Beijing Research Institute of Chemical Industry, Bijing, 100013

Received:1996-02-28 Revised:1996-02-28 Published:1996-02-28 Online:1996-02-28

摘要/Abstract

摘要： 采用交流阻抗和恒电位计时电流法测定了ＬｉＣｌＯ４·（ＰＥＯ）２０·（ＰＣ）１２·（ＥＣ）１２高分子电解质的锂离子迁移数。在非水溶液和高分子电解质中，锂是热力学不稳定的，表面生成一层固体电解质钝化膜，严重地影响了锂离子迁移数的准确测定。本方法避免固体电解质钝化膜的影响，给出正确的锂离子迁移数测定值，实验表明，ＬｉＣｌＯ４·（ＰＥＯ）２０·（ＰＣ）１２·（ＥＣ）１２电解质的电导率为０．８×１０－３／ｃｍ，锂离子迁移数为０．３。

关键词: 高分子电解质, 锂离子迁移数

Abstract: In this work a combination method of A. C. Impedance and chronoamperometry was used to determine the lithium ion transport number of LiClO_4·(PEO)_(20)·(PC)_(12)·(EC)_(12) polymer electrolyte. It is known that lithium is thermodynamically unstable in non-aqueous or polymer electrolytes, leading to the formtion of a film on lithium surface, called as solid electrolyte interphase (SEI). The presence of SEI layer will greatly influence the experimental result of lithium ion transport number. The new method avoid the effect of SEI layer, and can give correct transport number of lithium ion in the electrolyte of DCIO_4·(PED)_(20)·(PC)_(12)·(EC)_(12). The exporimental result indicates that the conducrivity of the electrolyte is 0. 8 ×10￣(-3)s/cm, Li￣+ transport number is 0. 30 at 25℃.

Key words: Polymer electrolyte, Lithium ion transport numbet

中图分类号:

O646.54

周如琪，刘庆国，仇卫华，张蕴，赵月娥，杨蕾玲. 改性LiClO_4－（PEO）_（20）电解质锂离子迁移数的测定[J]. 电化学（中英文）, 1996, 2(1): 41-46.

Zhou Ruqi; Liu Qngguo; Qiu Weihua; Zhang Yun; Zhao Yuee . Determination of Transport Number of the Modified LiClO_4- (PEO)_(20) Polymer Electrolyte[J]. Journal of Electrochemistry, 1996, 2(1): 41-46.

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https://electrochem.xmu.edu.cn/CN/Y1996/V2/I1/41

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