电解质
相间
电极
极化(电化学)
电化学
锂(药物)
电子
材料科学
离子
电子迁移率
化学物理
化学
分析化学(期刊)
光电子学
物理化学
物理
色谱法
医学
遗传学
有机化学
生物
内分泌学
量子力学
作者
Jake Christensen,John Newman
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2004-01-01
卷期号:151 (11): A1977-A1977
被引量:278
摘要
The passivating solid electrolyte interphase (SEI) layer forms at the surface of the negative-electrode active material in lithium-ion cells. A continuum-scale mathematical model has been developed to simulate the growth of the SEI and transport of lithium and electrons through the film. The model is used to estimate the film growth rate, film resistance, and irreversible capacity loss due to film formation. We show that film growth at the negative electrode is faster for charged batteries than for uncharged batteries and that higher electron mobility in the film leads to faster growth. If electron mobility is low, the rate of film growth is limited by transport of electrons through the film, and the rate decreases as the thickness increases. We examine the dependence of film resistance upon both film thickness and defect concentration in the film. We also show that the concentration polarization in the film increases as it grows at open circuit, even though the concentration gradient may decrease. © 2004 The Electrochemical Society. All rights reserved.
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