A chemo-mechanical model coupled with thermal effect on the hollow core–shell electrodes in lithium-ion batteries
A chemo-mechanical model coupled with thermal effect on the hollow core–shell electrodes in lithium-ion batteries
复制标题
锂离子电池空心壳电极的热效应耦合化学机械模型
DOI:
10.1016/j.taml.2017.09.001
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发表时间:
2017-07
影响因子:
3.4
通讯作者:
Chunsheng Lu
中科院分区:
文献类型:
--
作者:
Bin Hu;Zengsheng Ma;Weixin Lei;Youlan Zou;Chunsheng Lu
Electrode is a key component to remain durability and safety of lithium-ion (Li-ion) batteries. Li-ion insertion/removal and thermal expansion mismatch may induce high stress in electrode during charging and discharging processes. In this paper, we present a continuum model based on COMSOL Multiphysics software, which involves thermal, chemical and mechanical behaviors of electrodes. The results show that, because of diffusion-induced stress and thermal mismatch, the electrode geometry plays an important role in diffusion kinetics of Li-ions. A higher local compressive stress results in a lower Li-ion concentration and thus a lower capacity when a particle is embedded another, which is in agreement with experimental observations.
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