Study on microstructures of electrodes in lithium-ion batteries using variational multi-scale enrichment

JOURNAL OF POWER SOURCES

卷:315

Article

Lee, Sangmin¹  Sastry, Ann Marie²  Park, Jonghyun³ 

[1] Univ Notre Dame, Dept Mech & Aerosp Engn, Notre Dame, IN 46556 USA

[2] Sakti3, Ann Arbor, MI 48108 USA

[3] Missouri Univ Sci & Technol, Dept Mech & Aerosp Engn, Rolla, MO 65401 USA

关键词: Variational approach;    Microstructures;    Multiscale modeling;    Battery design;    Tortuosity;    Porosity;   

DOI  :  10.1016/j.jpowsour.2016.02.086

来源: Elsevier

【 摘 要 】

Performance and degradation of a Li-ion battery reflect the transport and kinetics of related species within the battery's electrode microstructures. The variational multi-scale principle is adapted to a Li-ion battery system in order to improve the predictions of battery performance by including multi-scale and multiphysics phenomena among the particle aggregates in the electrode; this physics cannot be addressed by conventional homogenized approaches. The developed model is verified through the direct numerical solutions and compared with the conventional pseudo-2D (P2D) model method. The developed model has revealed more dynamic battery behaviors related to the variation of the microstructure-such as particle shape, tortuosity, and material composition-while the corresponding result from P2D shows a monotonous change within different structures. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free