Understanding solid electrolyte interface film formation on graphite electrodes

被引：346

作者：

Zhang, SS ^{[1
]}

Ding, MS ^{[1
]}

Xu, K ^{[1
]}

Allen, J ^{[1
]}

Jow, TR ^{[1
]}

机构：

[1] USA, Res Lab, Adelphi, MD 20783 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2001年 / 4卷 / 12期

关键词：

D O I：

10.1149/1.1414946

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Using ac impedance, we studied the formation process of solid electrolyte interface (SED film on graphite electrode during initial cycles. Results show that the SEI formation takes place through two major stages. The first stage takes place at voltages above 0.25 V (before lithiation of graphite), during which a loose and highly resistive film is formed. The second stage occurs at a narrow voltage range of 0.25-0.04 V, which proceeds simultaneously with lithiation of graphite electrode, In the second stage, a stable, compact, and highly conductive SEI film is produced. (C) 2001 The Electrochemical Society.

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收藏

页码：A206 / A208

页数：3

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