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Numerical simulation of lithium‐ion battery performance considering electrode microstructure
Author(s) -
Kespe Michael,
Nirschl Hermann
Publication year - 2015
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.3459
Subject(s) - microstructure , microscale chemistry , separator (oil production) , materials science , periodic boundary conditions , electrode , cathode , particle (ecology) , ion , lithium ion battery , lithium (medication) , anode , particle size , battery (electricity) , composite material , mechanics , chemistry , chemical engineering , boundary value problem , thermodynamics , physics , engineering , mathematics , endocrinology , oceanography , power (physics) , quantum mechanics , medicine , mathematics education , organic chemistry , geology
Summary A spatially resolved three‐dimensional microscale model of a lithium‐ion battery half‐cell is developed and applied to periodic electrode microstructures made up of spherical particles following a bidisperse particle size distribution. The geometries of the periodic unit cells are derived from discrete element simulations using periodic boundary conditions. Three different particle arrangements, which consist of two layered structures and one mixed particle array, as well as three different compression rates, are considered. In the study, the cathode is assumed to consist of LiMn 2 O 4 as active material. Layered particle arrangements comprising the particle fraction of the smaller particle size in the region close to the separator are found to be beneficial especially for high‐rate applications. According to the simulation results, the high‐rate capability is reduced upon compression of the electrode microstructures. Copyright © 2015 John Wiley & Sons, Ltd.