Surface film formation on a graphite electrode in Li-ion batteries:: AFM and XPS study

被引：225

作者：

Leroy, S

Blanchard, F

Dedryvère, R

Martinez, H

Carré, B

Lemordant, D

Gonbeau, D

机构：

[1] Univ Pau, LCTPCM, F-64053 Pau, France

[2] Fac Sci Tours, PIMIR, EA 2098, F-37000 Tours, France

来源：

SURFACE AND INTERFACE ANALYSIS | 2005年 / 37卷 / 10期

关键词：

Li-ion battery; graphite; electrode/electrolyte interface; XPS; AFM;

D O I：

10.1002/sia.2072

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The formation of a passivation film (solid electrolyte interphase, SEI) at the surface of the negative electrode of full LiCoO2/graphite lithium-ion cells using LiPF6 (1M) in carbonate solvents as electrolyte was investigated by means of x-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The analyses were carried out at different potentials of the first and the fifth cycles, showing the potential-dependent character of the surface-film species formation. These species were mainly identified as Li2CO3 up to 3.8 V and LiF up to 4.2 V. This study shows the formation of the SEI during charging and its partial dissolution during discharge. Copyright (c) 2005 John Wiley & Sons, Ltd.

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页码：773 / 781

页数：9

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