A study of electrochemical kinetics of lithium ion in organic electrolytes

被引：79

作者：

Lee, SI ^{[1
]}

Jung, UH ^{[1
]}

Kim, YS ^{[1
]}

Kim, MH ^{[1
]}

Ahn, DJ ^{[1
]}

Chun, HS ^{[1
]}

机构：

[1] Korea Univ, Dept Chem Engn, Seoul 136701, South Korea

来源：

KOREAN JOURNAL OF CHEMICAL ENGINEERING | 2002年 / 19卷 / 04期

关键词：

lithium ion batteries; RDE; electrolyte; limiting current density; diffusion coefficient;

D O I：

10.1007/BF02699310

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Limiting current densities equivalent to the transport-controlling step of lithium ions in organic electrolytes were measured by using a rotating disk electrode (RDE). The diffusion coefficients of lithium ion in the electrolyte of PC/LiClO4, EC : DEC/LiPF6 and EC : DMC/LiPF6 were determined by the limiting current density data according to the Levich equation. The diffusion coefficients increased in the order of PC/LiClO4<EC : DEC/LiPF6<EC : DMC/LiPF6 with respect to molar concentration of lithium salt. The maximum value of diffusivity was 1.39x10(-5)cm(2)/s for 1 M LiPF6 in EC : DMC=1 : 1. Exchange current densities and transfer coefficients of each electrolyte were determined according to the Butler-Volmer equation.

引用

页码：638 / 644

页数：7

共 24 条

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