Comparison of a phase-field model for intercalation induced stresses in electrode particles of lithium ion batteries for small and finite deformation theory
Comparison of a phase-field model for intercalation induced stresses in electrode particles of lithium ion batteries for small and finite deformation theory
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DOI：
10.1016/j.euromechsol.2014.02.020
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发表时间：
2014-11
影响因子：
4.1
通讯作者：
Ann-Christin Walk;Magalie Huttin;M. Kamlah
中科院分区：
文献类型：
--
作者：
Ann-Christin Walk;Magalie Huttin;M. Kamlah
锂锰氧化物尖晶石与许多锂离子电池的电极材料一样，在嵌入过程中会发生相变。在本文中，我们研究这种现象的建模使用的Cahn-Hilliard方程耦合到弹性通过热机械类比。通过对锂锰氧化物尖晶石电极颗粒的模拟，比较了这些理论的有限变形和小变形公式。特别是，材料常数的变化进行了讨论。此外，我们根据Anand（2012）的最新工作研究了Gurtin外部微力的识别。我们表明，这意味着一个显着的变化的理论相比，经典的配方，其中的细节进行了讨论，通过模拟。
Lithium manganese oxide spinel, like many other electrode materials of lithium ion batteries shows phase changes during intercalation. In this paper we investigate the modeling of this phenomenon using the Cahn–Hilliard equation coupled to elasticity by means of a thermomechanical analogy. The finite and small deformation formulation of these theories are compared by means of simulations of electrode particles of lithium manganese oxide spinel. In particular, variations of the material constants are discussed. Furthermore, we investigate the identification of Gurtin's external microforce according to recent work by Anand (2012). We show that this means a significant change of the theory as compared to the classical formulation, the details of which are discussed by means of simulations.