On the diffusion of Li+ defects in LiCoO2 and LiNiO2

被引：66

作者：

Nakamura, K

Ohno, K

Okamura, K

Michihiro, Y

Nakabayashi, I

Kanashiro, T

机构：

[1] Univ Tokushima, Fac Engn, Dept Phys, Tokushima 7708506, Japan

[2] Univ Tokushima, Fac Engn, Dept Chem Sci & Technol, Tokushima 7708506, Japan

[3] Matsushita Battery Ind Co Ltd, Moriguchi, Osaka 5708511, Japan

来源：

SOLID STATE IONICS | 2000年 / 135卷 / 1-4期

关键词：

ion diffusion; NMR; LiCoO2; LiNiO2;

D O I：

10.1016/S0167-2738(00)00293-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

NMR spectra of Li-7 nucleus have been measured in LiCoO2 and LiNiO2. Line widths of the spectra decreased with increasing temperature above 400 K. The decrease obviously indicates the motional narrowing originating from diffusing Li+ defects. A simple ion hopping model revealed that the diffusion constant of LiCoO2 with an activation energy of 0.3 eV is larger than that of LiNiO2 with the activation energy of 0.6 eV. This suggests that lithium ions are easier to diffuse in LiCoO2 than in LiNiO2 at high temperatures. (C) 2000 Elsevier Science B.V. All rights reserved.

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页码：143 / 147

页数：5

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