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contributor authorWu, Linmin
contributor authorZhang, Jing
date accessioned2019-03-17T11:04:05Z
date available2019-03-17T11:04:05Z
date copyright12/12/2018 12:00:00 AM
date issued2019
identifier issn2381-6872
identifier otherjeecs_016_02_021008.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4256606
description abstractIn this study, lithium (Li) intercalation-induced stress of LiCoO2 with anisotropic properties using three-dimensional (3D) microstructures has been studied systematically. Phase field method was employed to generate LiCoO2 polycrystals with varying grain sizes. Li diffusion and stresses inside the polycrystalline microstructure with different grain size, grain orientation, and grain boundary diffusivity were investigated using finite element method. The results show that the anisotropic mechanical properties and Li concentration-dependent volume expansion coefficient have a very small influence on the Li chemical diffusion coefficients. The low partial molar volume of LiCoO2 leads to this phenomenon. The anisotropic mechanical properties have a large influence on the magnitude of stress generation. Since the Young's modulus of LiCoO2 along the diffusion pathway (a–b axis) is higher than that along c–axis, the Li concentration gradient is larger along the diffusion pathway. Thus, for the same intercalation-induced strain, the stress generation will be higher (∼40%) than that with isotropic mechanical properties as discussed in our previous study (Wu, L., Zhang, Y., Jung, Y.-G., and Zhang, J., 2015, “Three-Dimensional Phase Field Based Finite Element Study on Li Intercalation-Induced Stress in Polycrystalline LiCoO2,” J. Power Sources, 299, pp. 57–65). This work demonstrates the importance to include anisotropic property in the model.
publisherThe American Society of Mechanical Engineers (ASME)
titleThree-Dimensional Finite Element Study on Lithium Diffusion and Intercalation-Induced Stress in Polycrystalline LiCoO2 Using Anisotropic Material Properties
typeJournal Paper
journal volume16
journal issue2
journal titleJournal of Electrochemical Energy Conversion and Storage
identifier doi10.1115/1.4041981
journal fristpage21008
journal lastpage021008-5
treeJournal of Electrochemical Energy Conversion and Storage:;2019:;volume( 016 ):;issue: 002
contenttypeFulltext


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