Proof of Intercrystallite Ionic Transport in LiMPO4 Electrodes (M = Fe, Mn)

被引：82

作者：

Lee, Kyu Tae ^{[1
]}

Kan, Wang H. ^{[1
]}

Nazar, Linda F. ^{[1
]}

机构：

[1] Univ Waterloo, Dept Chem, Waterloo, ON N2L 3G1, Canada

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 17期

基金：

加拿大自然科学与工程研究理事会;

关键词：

LIFEPO4; NANOPARTICLES; LITHIUM BATTERIES; MISCIBILITY GAP; PERFORMANCE; SIZE;

D O I：

10.1021/ja8090559

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Homogeneous-sized LiMPO4 (M = Fe, Mn) nanorods and bulk particles were synthesized, and the thermodynamic characteristics of their mixtures as electrodes were analyzed to study the lithiation/delithiation mechanism for the general case of nanoparticles with a heterogeneous particle size distribution. We show that ionic transport occurs between nano and bulk particles in a cell at equilibrium, due to their electrochemical potential difference that originates from their different thermodynamic properties. This means that one phase in a single particle is preferred to two phases in a single particle during lithiation/delithiation of LiMPO4 from the viewpoint of thermodynamics if the electrode is composed of differing particle sizes.

引用

页码：6044 / +

页数：3

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