Surface film formation on a carbonaceous electrode: Influence of the binder chemistry

被引：114

作者：

El Ouatani, L. ^{[1
]}

Dedryvere, R. ^{[1
]}

Ledeuil, J-B ^{[1
]}

Siret, C. ^{[2
]}

Biensan, P. ^{[2
]}

Desbrieres, J. ^{[1
]}

Gonbeau, D. ^{[1
]}

机构：

[1] Univ Pau, IPREM, F-64053 Pau 9, France

[2] SAFT, F-33074 Bordeaux, France

来源：

JOURNAL OF POWER SOURCES | 2009年 / 189卷 / 01期

关键词：

Li-ion batteries; XPS; Graphite; SEI; CMC; SBR; LI-ION BATTERIES; GRAPHITE NEGATIVE ELECTRODES; ELECTROCHEMICAL PERFORMANCE; CARBOXYMETHYL CELLULOSE; LITHIUM BATTERIES; ANODES; XPS; STABILITY;

D O I：

10.1016/j.jpowsour.2008.11.031

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：

We have investigated the possible effect of carboxymethylcellulose (CMC) in the SEI film formation at the surface of a graphite composite electrode of LiCoO2/graphite cells. The electrode/electrolyte interface was analyzed by XPS at different potentials of the first electrochemical cycle, and after simple contact of the electrode with the electrolyte. We could evidence a specific reactivity of CMC towards the electrolyte (LiPF6 in a mixture of carbonate solvents), resulting in the formation of new species that contribute to the Surface film composition. This result shows that the chemical reactivity of CMC towards the electrolyte takes part in the formation of the surface film, and contributes to the good properties of CMC as binder. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：72 / 80

页数：9

共 29 条

[1] On the correlation between surface chemistry and performance of graphite negative electrodes for Li ion batteries [J].