Surface chemistry and lithium storage capability of the graphite-lithium electrode

被引：181

作者：

Yazami, R ^{[1
]}

机构：

[1] Inst Natl Polytech Grenoble, UMR CNRS 5631, Lab Electrochim & Physichochim Mat & Interfaces, F-38402 St Martin Dheres, France

来源：

ELECTROCHIMICA ACTA | 1999年 / 45卷 / 1-2期

关键词：

graphite-lithium; passivation; SEI; chemical analysis;

D O I：

10.1016/S0013-4686(99)00195-4

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We show that the chemistry taking place on the surface of graphite-base negative electrode fixes for the most part the total capacity of a lithium-ion battery. A linear relationship between the reversible and the irreversible capacities has been established showing the interdependence between the lithium storage capability of graphite powders and the lost capacity due to surface chemistry. The latter leads to the formation of an SEI when EC solvent is used. Several tools were used to characterize the SEI including SEM, FTIR, XPS and AFM, and showed its very heterogeneous composition and its nonuniform morphology. Chemical formulations of the SEI formed on deeper a, b surfaces of HOPG are proposed together with a mechanism of the electrolyte decomposition. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：87 / 97

页数：11

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