TEM study of fracturing in spherical and plate-like LiFePO4 particles

被引：137

作者：

Gabrisch, H. ^{[1
]}

Wilcox, J. ^{[2
]}

Doeff, M. M. ^{[2
]}

机构：

[1] Univ New Orleans, Dept Chem, Adv Mat Res Inst, New Orleans, LA 70148 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2008年 / 11卷 / 03期

关键词：

D O I：

10.1149/1.2826746

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

An investigation of fracturing in LiFepO(4) particles as a function of the particle morphology and history is presented. Two types of samples, one subjected to electrochemical cycling and another to chemical delithiation, are compared. We observe the formation of microfractures parallel to low indexed lattice planes in both samples. The fracture surfaces are predominantly parallel to (100) planes in the chemically delithiated powder and (100) and (010) planes in the electrochemically cycled powder. A consideration of the dislocations' stress fields shows that particle geometry plays an important role in the observed behavior. (c) 2008 The Electrochemical Society.

引用

页码：A25 / A29

页数：5

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