电解质
碳酸乙烯酯
碳酸二乙酯
电极
X射线光电子能谱
材料科学
化学工程
无机化学
碳酸二甲酯
化学
碳酸盐
物理化学
有机化学
冶金
催化作用
工程类
作者
Loubna El Ouatani,Rémi Dedryvère,C. Siret,P. Biensan,Danielle Gonbeau
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2009-01-01
卷期号:156 (6): A468-A468
被引量:176
摘要
Vinylene carbonate (VC) is a commonly used electrolyte additive in Li-ion batteries because of its beneficial role on the formation of the solid electrolyte interphase. It was shown to contribute to surface film formation on both electrodes of cells via its radical polymerization mechanism. In this paper, we carried out a comparative study of the role of VC on electrode/electrolyte interfaces in , , and systems, in which the potential and the chemical nature of each electrode are changed. Coin-cells were charged at different potentials using a /ethylene carbonate: diethyl carbonate: dimethyl carbonate liquid electrolyte with or without VC, and the electrodes were analyzed by X-ray photoelectron spectroscopy. We showed there is no interaction between the negative and positive electrodes in the VC polymerization mechanisms, for example, by exchange of chemical species from one electrode to the other, during the first charge. Separate mechanisms occur, although the same VC polymer is deposited at the surface of both electrodes.
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