锂离子电池中锂离子的场限制迁移

ECS Electrochemistry Letters Pub Date : 2014-11-10 DOI:10.1149/2.0071501EEL

Fuqian Yang

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引用次数: 12

摘要

锂离子电池中锂离子的迁移不能简单地用菲克第二定律来描述;在分析锂离子迁移时，需要考虑离子迁移、电场和应力之间的相互作用。利用热活化过程理论，发现电场和机械应力共同作用下离子迁移通量是电势梯度和应力梯度的非线性函数。电场可以加速或阻碍锂化层的生长，这取决于电场的极性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Field-Limited Migration of Li-Ions in Li-Ion Battery

The migration of Li-ions in lithium-ion battery cannot be simply described by Fick’s second law; the interactions among ionic migration, ﬁeld, and stress need to be taken into account when analyzing the migration of Li-ions. Using the theory of thermal activation process, the ﬂux for ionic migration under concurrent action of electric ﬁeld and mechanical stress is found to be a nonlinear function of the gradient of electric potential and the gradient of stress. Electric ﬁeld can either accelerate or retard the growth of the lithiation layer, depending on polarity of the ﬁeld.

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来源期刊

ECS Electrochemistry Letters ELECTROCHEMISTRY-MATERIALS SCIENCE, MULTIDISCIPLINARY

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