Identity of passive film formed on aluminum in Li-ion battery electrolytes with LiPF6

被引：85

作者：

Zhang, Xueyuan ^{[1
]}

Devine, T. M.

机构：

[1] Lawrence Berkeley Natl Lab, Energy Environm & Technol Div, Berkeley, CA 94704 USA

[2] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2006年 / 153卷 / 09期

关键词：

D O I：

10.1149/1.2214465

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The passive film that forms on aluminum in 1:1 ethylene carbonate+ethylmethyl carbonate with 1.2 M LiPF6 and 1:1 ethylene carbonate+dimethyl carbonate with 1.0 M LiPF6 was investigated by a combination of electrochemical quartz crystal microbalance measurements (EQCM), electrochemical impedance spectroscopy (EIS), and X-ray photoelectron spectroscopy. During anodic polarization of aluminum a film of AlF3 forms on top of the air-formed oxide, creating a duplex, or two-layered film. The thickness of the AlF3 increases with the applied potential. Independent measurements of film thickness by EQCM and EIS indicate that at a potential of 5.5 V vs Li/Li+, the thickness of the AlF3 is approximately 1 nm.

引用

页码：B344 / B351

页数：8

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