Variable diffusivity in intercalation materials - A theoretical approach

被引：34

作者：

Paxton, B ^{[1
]}

Newman, J ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1996年 / 143卷 / 04期

关键词：

D O I：

10.1149/1.1836631

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A theoretical approach for estimating a best constant coefficient to use in an electrode model is presented for the case where experimental data exist on the diffusion coefficient as a function of the state of charge of an intercalation material. this method uses a model of diffusion in a single particle as its basis. From examining the surface concentration vs. average concentration curve for diffusion in a single particle, we can determine a diffusion coefficient that is a function of the dimensionless flux rate of material into the particle. This diffusion coefficient function can then be used in a model of a porous electrode.

引用

页码：1287 / 1292

页数：6

共 12 条

[1]

DAVOLIO G, 1990, ELECTROCHEMICAL SOC, P281

[2] MATHEMATICAL-MODELING OF A NICKEL-CADMIUM CELL - PROTON DIFFUSION IN THE NICKEL ELECTRODE [J].