Diffusion mechanism of lithium ions in LiNi0.5Mn1.5O4

被引：16

作者：

Seyyedhosseinzadeh, H. ^{[1
]}

Mahboubi, F. ^{[1
]}

Azadmehr, A. ^{[1
]}

机构：

[1] Amirkabir Univ Technol, Dept Min & Met Engn, Tehran, Iran

来源：

ELECTROCHIMICA ACTA | 2013年 / 108卷

关键词：

LiNi0.5Mn1.5O4; Diffusion mechanism; Diffusion constant; Activation energy; Li-ion battery; DENSITY-FUNCTIONAL THEORY; INTERCALATION; BATTERIES; CATHODES;

D O I：

10.1016/j.electacta.2013.07.034

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

LiNi0.5Mn1.5O4 is suitable for electrochemical applications as an active material. This material has capability for high rate application in Li-ion battery. In this research, the diffusion mechanism of Li ions in LiNi0.5Mn1.5O4 was studied by chronoamperometry technique and computer simulation (ab initio and Fickian approach). According to the results, two bulk diffusion constants were calculated for LiNi0.5Mn1.5O4 during intercalation or deintercalation. At low concentration of Li ions in LiNi0.5Mn1.5O4, the diffusion constant was about 10(-9) cm(2)/s and for other Li ions concentration, it was about 10(-11) cm(2)/s. In addition, the diffusion constant at the surface of LiNi0.5Mn1.5O4 was estimated 10(-8) cm2/s by a semi empirical model. So, the diffusion constant of Li ions in LiNi0.5Mn1.5O4 has been estimated in the range of 10(-8) to 10(-11) cm(2)/s. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：867 / 875

页数：9

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