Applied Mathematics and Mechanics (English Edition) ›› 2021, Vol. 42 ›› Issue (12): 1703-1716.doi: https://doi.org/10.1007/s10483-021-2800-8

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Prelithiation design for suppressing delamination in lithium-ion battery electrodes

Yifei QIAN1,2, Bo LU1,2, Yinhua BAO1,2, Yanfei ZHAO3, Yicheng SONG1,2, Junqian ZHANG1,2   

  1. 1. Department of Mechanics, Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China;
    2. Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200444, China;
    3. Department of Civil Engineering, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200444, China
  • Received:2021-07-20 Revised:2021-10-24 Published:2021-11-23
  • Contact: Bo LU ,E-mail:bo lu@shu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China (Nos. 12072183, 11872236, and 12172205)

Abstract: Prelithiation has been intensively investigated in high-capacity lithiumion batteries (LIBs). However, the optimization of prelithiation degrees for long service life of LIBs still remains a challenge. The positive effect of prelithiation on suppressing degradation of LIBs, besides directly pursuing the high first Coulomb efficiency which has been widely reported in the literature, is revealed and discussed based on an analytical model focusing on the interfacial delamination in electrodes. For full charge-discharge cycling, well-designed prelithiation can effectively suppress the delamination and reduce the debonding size by approximately 25%, compared with the case without prelithiation. For the strategy combining partial charge-discharge cycling and prelithiation, the largest reversible capacity without debonding can be significantly improved by approximately 100% with well-designed prelithiation. This work is expected to provide a prelithiation design principle and further improve the mechanical stability of LIB electrodes.

Key words: prelithiation, delamination, electrode, concentration-dependent property, analytical solution

2010 MSC Number: 

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