Cracking predictions of lithium-ion battery electrodes by X-ray computed tomography and modelling

• DOI: 10.1016/j.jpowsour.2022.231119
• Publication Date: 2022-02-19T10:24:44Z
• Authors: Adam M. Boyce; Emilio Martínez-P...; Aaron Wade; Ye Shui Zhang; Josh J. Bailey; Thomas M.M. Heenan; Dan J.L. Brett; Paul R. Shearing
• Keywords: Void (composites); Separator (oil production)

Fracture of lithium-ion battery electrodes is found to contribute capacity fade and reduce the lifespan a battery. Traditional fracture models for batteries are restricted consideration single, idealised particle; here, advanced X-ray computed tomography (CT) imaging, an electro-chemo-mechanical model phase field framework combined predict void-driven in electrode particles realistic microstructure. The shown exhibit highly heterogeneous electrochemical response that depends on particle size distance from separator/current collector. enables prediction increased cracking due enlarged cycling voltage windows, susceptibility as function thickness, damage sensitivity discharge rate. This provides platform facilitates deeper understanding design next-generation with higher capacities improved degradation characteristics.