Passivating Ability of Surface Film Derived from Vinylene Carbonate on Tin Negative Electrode

被引：38

作者：

Park, Sangjin ^{[1
]}

Ryu, Ji Heon ^{[1
]}

Oh, Seung M. ^{[1
]}

机构：

[1] Seoul Natl Univ, Coll Engn, Dept Chem & Biol Engn, WCU Program C2E2, Seoul 151744, South Korea

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2011年 / 158卷 / 05期

关键词：

LITHIUM-ION-BATTERIES; LI-ION; ELECTROCHEMICAL PERFORMANCE; ANODE MATERIALS; ALLOY ANODES; INTERFACE; GRAPHITE; CELLS; INTERMETALLICS; XPS;

D O I：

10.1149/1.3561424

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The passivating ability of surface film derived from vinylene carbonate (VC) is addressed on tin (Sn) negative electrode after a comparative study on the thickness, film growth pattern, chemical composition, and mechanical flexibility of the surface films generated from VC-free and VC-added electrolytes. The surface film derived from the former electrolyte is enriched by inorganic fluorinated and carbonate species, and shows a poor passivating ability to cause a continued electrolyte decomposition, film growth and eventual electrode failure. In contrast, organic carbon-oxygen species are dominant in the film derived from the VC-added electrolyte. Even if this film is thinner than the other, it passivates the Sn electrode surface more effectively. As a result, the film growth and electrode polarization are less significant. The superior passivating ability of organic-rich surface film has been ascribed to a uniform coverage and higher mechanical flexibility. (C) 2011 The Electrochemical Society. [DOI: 10.1149/1.3561424] All rights reserved.

引用

页码：A498 / A503

页数：6

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