Effect of reversible electrochemical reaction on Li diffusion and stresses in cylindrical Li-ion battery electrodes

被引：37
|
作者：
Zhang, Tao [1 ]
Guo, Zhansheng [1 ,2 ]
Wang, Yuhui [1 ]
Zhu, Jianyu [1 ]
机构：
[1] Shanghai Univ, Shanghai Inst Appl Math & Mech, Shanghai 200072, Peoples R China
[2] Shanghai Univ, Shanghai Key Lab Mech Energy Engn, Shanghai 200072, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2014年 / 115卷 / 08期
基金：
美国国家科学基金会;
关键词：
IN-SITU TEM; THIN-FILM ELECTRODES; CRYSTALLINE SILICON; INITIAL LITHIATION; LITHIUM; INSERTION; INTERCALATION; PARTICLES; FRACTURE; DEFORMATION;
D O I：
10.1063/1.4866423
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The effect of reversible electrochemical reaction on Li diffusion and stress in a cylindrical Li-ion battery electrode is studied. A new relation among Li concentration, the fraction of forward reaction product, and the diffusion-reaction-induced stress is derived. The electrochemical reaction has little effect on Li diffusion but enhances the stress significantly, and the reaction induced stress is much larger than diffusion induced stress. The electrochemical reaction will accelerate structural fading or capacity loss of the electrode. The backward reaction can be ignored for both galvanostatic and potentiostatic charging but has a significant effect on stress for galvanostatic discharging. The optimized charging procedure considering the reversible electrochemical reaction is galvanostatic first followed by potentiostatic, which is consistent with the manufacturer recommendation procedure. (C) 2014 AIP Publishing LLC.
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页数：12
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