In this section
@article{Ai:2022:10.1016/j.jpowsour.2022.231805,
author = {Ai, W and Wu, B and Martínez-Pañeda, E},
doi = {10.1016/j.jpowsour.2022.231805},
journal = {Journal of Power Sources},
title = {A coupled phase field formulation for modelling fatigue cracking in lithium-ion battery electrode particles},
url = {http://dx.doi.org/10.1016/j.jpowsour.2022.231805},
volume = {544},
year = {2022}
}
TY - JOUR
AB - Electrode particle cracking is one of the main phenomena driving battery capacity degradation. Recent phase field fracture studies have investigated particle cracking behaviour. However, only the beginning of life has been considered and effects such as damage accumulation have been neglected. Here, a multi-physics phase field fatigue model has been developed to study crack propagation in battery electrode particles undergoing hundreds of cycles. In addition, we couple our electrochemo-mechanical formulation with X-ray CT imaging to simulate fatigue cracking of realistic particle microstructures. Using this modelling framework, non-linear crack propagation behaviour is predicted, leading to the observation of an exponential increase in cracked area with cycle number. Three stages of crack growth (slow, accelerating and unstable) are observed, with phenomena such as crack initialisation at concave regions and crack coalescence having a significant contribution to the resulting fatigue crack growth rates. The critical values of C-rate, particle size and initial crack length are determined, and found to be lower than those reported in the literature using static fracture models. Therefore, this work demonstrates the importance of considering fatigue damage in battery degradation models and provides insights on the control of fatigue crack propagation to alleviate battery capacity degradation.
AU - Ai,W
AU - Wu,B
AU - Martínez-Pañeda,E
DO - 10.1016/j.jpowsour.2022.231805
PY - 2022///
SN - 0378-7753
TI - A coupled phase field formulation for modelling fatigue cracking in lithium-ion battery electrode particles
T2 - Journal of Power Sources
UR - http://dx.doi.org/10.1016/j.jpowsour.2022.231805
UR - http://arxiv.org/abs/2206.12727v1
UR - https://www.sciencedirect.com/science/article/pii/S0378775322007959
UR - http://hdl.handle.net/10044/1/98450
VL - 544
ER -
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