Surface film formation on a graphite negative electrode in lithium-ion batteries: Atomic force microscopy study on the effects of film-forming additives in propylene carbonate solutions

被引：256

作者：

Jeong, SK ^{[1
]}

Inaba, M ^{[1
]}

Mogi, R ^{[1
]}

Iriyama, Y ^{[1
]}

Abe, T ^{[1
]}

Ogumi, Z ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Energy & Hydrocarbon Chem, Sakyo Ku, Kyoto 6068501, Japan

来源：

LANGMUIR | 2001年 / 17卷 / 26期

关键词：

D O I：

10.1021/la015553h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In situ electrochemical atomic force microscopy (AFM) observation of the basal plane of highly oriented pyrolytic graphite (HOPG) was performed during cyclic voltammetry in 1 M LiClO4/propylene carbonate (PC) containing 3 wt vinylene carbonate (VC), fluoroethylene carbonate (FEC), and ethylene sulfite (ES) in order to clarify the roles of these additives in the formation of a protective surface film on a graphite negative electrode in lithium-ion batteries. Particle-like precipitates appeared on the HOPE surface at the potentials 1.35, 1.15, and 1.05 V versus Li+/Li in PC + VC, PC + FEC, and PC + ES, respectively, and covered the whole surface at lower potentials. No evidence for cointercalation of solvent molecules was observed in the presence of each additive. It was concluded that the layer of the precipitates functions as a protective surface film, which suppresses cointercalation of PC molecules as well as direct solvent decomposition on the surface of the graphite negative electrode.

引用

页码：8281 / 8286

页数：6

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