Mechanism of Anodic Dissolution of the Aluminum Current Collector in 1 M LiTFSI EC:DEC 3:7 in Rechargeable Lithium Batteries

被引：162

作者：

Kraemer, Elisabeth ^{[1
]}

Schedlbauer, Tanja ^{[1
]}

Hoffmann, Bjoern ^{[1
]}

Terborg, Lydia ^{[1
]}

Nowak, Sascha ^{[1
]}

Gores, Heiner J. ^{[1
]}

Passerini, Stefano ^{[1
]}

Winter, Martin ^{[1
]}

机构：

[1] Univ Munster, Inst Phys Chem, MEET Battery Res Ctr, D-48149 Munster, Germany

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2013年 / 160卷 / 02期

关键词：

IMPEDANCE SCANNING QCM; ELECTRODE MATERIALS; ION BATTERIES; CORROSION; CARBONATE;

D O I：

10.1149/2.081302jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

So-called "corrosion" of the aluminum current collector in the electrolyte 1 M LiTFSI in ethylene carbonate : diethyl carbonate, EC:DEC (3:7, by wt) has been investigated by electrochemical and analytical methods. In fact, Al "corrosion" in this electrolyte is actually an anodic Al dissolution reaction. In addition to Al dissolution various electrolyte degradation processes were identified. A combination of a specially developed on-line ICP-OES method and in situ EQCM measurements revealed that before the dissolution of aluminum starts, an "activation" process takes place for ca. 6 hours, which is accompanied by strong electrolyte oxidation. The electrolyte decomposition reactions were investigated by ex situ IC measurements which showed that the LiTFSI decomposed and that F- s the main decomposition product. ex situ GC-MS measurements revealed that also the solvent decomposes and CO2 as well as ethoxyethanol are formed as degradation products. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.081302jes] All rights reserved.

引用

页码：A356 / A360

页数：5

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