A dilatometric study of lithium intercalation into powder-type graphite electrodes

被引：102

作者：

Hahn, M. ^{[1
]}

Buqa, H. ^{[1
]}

Ruch, P. W. ^{[1
]}

Goers, D. ^{[2
]}

Spahr, M. E. ^{[2
]}

Ufheil, J. ^{[1
]}

Novak, P. ^{[1
]}

Koetz, R. ^{[1
]}

机构：

[1] Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland

[2] TIMCAL SA, CH-6743 Bodio TI, Switzerland

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2008年 / 11卷 / 09期

关键词：

D O I：

10.1149/1.2940573

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The thickness change of porous multiparticle graphite electrodes upon first electrochemical lithium intercalation and extraction was investigated by means of electrochemical dilatometry. For all investigated graphites, expansion starts well above 0.5 V vs Li/Li(+) and thus, before any unsolvated Li intercalation compounds are formed. This finding can be explained by solvent cointercalation during the first charge prior to SEI formation, as described by the Besenhard model. At potentials < 0.3 V vs Li/Li(+), i.e., in the region of unsolvated Li(+) intercalation, the dilatation curves reveal the same major staging features that are seen in the corresponding potential profiles. (C) 2008 The Electrochemical Society.

引用

页码：A151 / A154

页数：4

共 20 条

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