On the determination of kinetic characteristics of lithium intercalation into carbon

被引：41

作者：

Churikov, AV ^{[1
]}

Volgin, MA ^{[1
]}

Pridatko, KI ^{[1
]}

机构：

[1] Saratov NG Chernyshevskii State Univ, Chem Dept, Saratov 410026, Russia

来源：

ELECTROCHIMICA ACTA | 2002年 / 47卷 / 17期

基金：

俄罗斯基础研究基金会;

关键词：

lithium intercalation; Li-ion batteries; graphite; non-stationary diffusion; electrode kinetics;

D O I：

10.1016/S0013-4686(02)00183-4

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The diffusional processes proceeding in the intercalation electrode on applying a potential step are theoretically treated. The theory of chronovoltammetry is shown to require the necessary account of the contribution of the surface solid-state film to the overall diffusion resistance of the electrode. For the case of small deviations from equilibrium, analytical solutions of the diffusion problem have been obtained. Ignoring the retarding contribution of the surface film is shown to bring about an error into the diffusion coefficient of lithium in its alloys and intercalates. The theory has been experimentally verified with LixC6 electrodes of various compositions made of pyrocarbon films on a nickel backing as examples. The diffusion coefficients are 10(-11) -10(-9) cm(2) s(-1), depending on composition. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：2857 / 2865

页数：9

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