Phase-transformation wave dynamics in LiFePO4

被引：43

作者：

Burch, Damian ^{[1
]}

Singh, Gogi ^{[1
]}

Ceder, Gerbrand ^{[2
]}

Bazant, Martin Z. ^{[1
]}

机构：

[1] MIT, Dept Math, Cambridge, MA 02139 USA

[2] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

THEORY, MODELING AND NUMERICAL SIMULATION OF MULTI-PHYSICS MATERIALS BEHAVIOR | 2008年 / 139卷

关键词：

LiFePO4; continuum modeling; phase transformations; wave dynamics; defects;

D O I：

10.4028/www.scientific.net/SSP.139.95

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

A general continuum model has recently been proposed for the dynamics of ion intercalation in a single crystal of rechargeable-battery electrode materials [1]. When applied to strongly phase-separating, highly anisotropic materials such as LiFePO4, phase-transformation waves are predicted between the lithiated and unlithiated portions of a crystal. In this paper, we extend the analysis of the wave dynamics, and we describe a new mechanism for current capacity fade through the interactions of these waves with defects in the material.

引用

页码：95 / +

页数：2

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