4.6 Article

Prelithiation design for suppressing delamination in lithium-ion battery electrodes

Journal

APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
Volume 42, Issue 12, Pages 1703-1716

Publisher

SHANGHAI UNIV
DOI: 10.1007/s10483-021-2800-8

Keywords

prelithiation; delamination; electrode; concentration-dependent property; analytical solution; O346; 1

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This study reveals the positive effect of prelithiation on suppressing degradation of lithium-ion battery (LIB) electrodes through an analytical model, showing that well-designed prelithiation can effectively improve the mechanical stability of LIBs.
Prelithiation has been intensively investigated in high-capacity lithium-ion batteries (LIBs). However, the optimization of prelithiation degrees for long service life of LIBs still remains a challenge. The positive efffect 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.

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