Modeling lithium diffusion in nickel composite graphite

被引：17

作者：

Subramanian, VR ^{[1
]}

Yu, P ^{[1
]}

Popov, BN ^{[1
]}

White, RE ^{[1
]}

机构：

[1] Univ S Carolina, Dept Chem Engn, Ctr Electrochem Engn, Columbia, SC 29208 USA

来源：

JOURNAL OF POWER SOURCES | 2001年 / 96卷 / 02期

关键词：

Ni-composite graphite electrode; diffusion coefficient; exchange current;

D O I：

10.1016/S0378-7753(00)00657-1

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：

A simple theoretical model is presented to simulate the galvanostatic discharge behavior of the Ni-composite graphite electrode. The discharge profiles predicted by using a constant diffusion coefficient (CDC) and by a varied diffusion coefficient (VDC) are compared in this paper. The results show that. the VDC model can be simplified to the CDC for discharge rates less than 2C for a 5 mum particle. Also, an approximate analytical solution is presented for VDC model, which is found to be valid for discharge rates up to 6C. Exchange current and diffusion coefficient for the lithium-diffusion are predicted. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：396 / 405

页数：10

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