多物理
阳极
复合数
材料科学
电池(电)
锂离子电池
电化学
石墨
锂(药物)
参数统计
复合材料
联轴节(管道)
机械工程
有限元法
结构工程
工程类
电极
化学
物理
热力学
内分泌学
物理化学
功率(物理)
统计
医学
数学
作者
Binghe Liu,Yikai Jia,Jiani Li,Hanqing Jiang,Sha Yin,Jun Xu
标识
DOI:10.1016/j.jpowsour.2019.227667
摘要
Si/graphite composite (Si/G) anodes are now regarded among the most commercially available next-generation anode materials. The development of a fully coupled mechanical-electrochemical model for Si/G anode is an essential tool to design safer and lightweight lithium-ion battery modules/packs. In this paper, we establish an efficient model to study lithium-ion battery (LIB) with Si/G composite anode through the coupling of stress-induced battery model and homogenized mechanical model. By designing strategies for the coupling of mechanical and electrochemical governing equations, a multiphysics model is proposed. Experiments for battery charging with simultaneous various mechanical loadings are conducted to validate the established model. Finally, design-oriented parametric studies for governing factors (e.g., the Si/G mixture ratio and battery size) are discussed. Results provide a fundamental understanding of the failure mechanism of the composite anode and offer a powerful design tool for Si/G composite anode design for better electrochemical performance.
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