We are excited to share our latest publication, 'Modeling Particle Versus SEI Cracking in Lithium-Ion Battery Degradation: Why Calendar and Cycle Aging Cannot Simply be Added.'

In this study, we investigate the influence of regular check-ups during calendar aging experiments on lithium-ion battery degradation. Our findings indicate that during each check-up cycle, negative electrode particles crack, leading to accelerated SEI formation. This explains why, for the investigated aging data, the degradation expected from pure calendar and cycle aging cannot simply be added. Based on these results, we propose a simple, 4-parameter model to predict estimated particle crack rates. The model challenges the widely-accepted Paris' law, predicting that crack rates decrease with increased cycling.

This publication is the result of Alexander Karger's research visit to the ESE group at Imperial College London in late 2023, and we extend our thanks for the opportunity and their valuable collaboration.

Read the full open-access article here: https://iopscience.iop.org/article/10.1149/1945-7111/ad76da