TY - JOUR
T1 - Effects of cycling ranges on stress and capacity fade in lithium-ion pouch cells
AU - Liu, Xinyi M.
AU - Arnold, Craig B.
N1 - Funding Information:
This work has been supported by NSF through MRSEC Fund under grant DMR-1420541 and Princeton University Siebel Energy Grand Challenge. The authors would especially like to thank the Imaging and Analysis Center (IAC) at the Princeton Institute for the Science and Technology of Materials, as well as Dr. John Cannarella, Prof. Wole Soboyejo, and Prof. Dan Steingart from Princeton University for valuable discussions and feedback.
Publisher Copyright:
� The Author(s) 2016. Published by ECS. All rights reserved.
PY - 2016
Y1 - 2016
N2 - The coupling between mechanics and electrochemistry can be a useful tool in identifying battery aging. Here we investigate the relationship between stress and capacity fade in different types of commercial batteries under various cycling ranges. We identify individual contributions from stress-increasing mechanisms, such as film growth, and non-linear stress relaxation mechanisms. Different cycling ranges affect the average stress level inside the batteries, leading to varying levels of stress relaxation, which dominates the overall stress behavior initially, but gradually is overtaken by linear stress-increasing mechanisms at higher cycle number. The slopes of the linear film growth vary with cycling range and battery type, and we correlate these effects with both mechanical and electrochemical phenomena. Commercial batteries with different compositions exhibit qualitatively similar results on stress vs. state of health (SOH), but vary quantitatively due to differences in their mechanical properties, which can be identified through mechanical tests.
AB - The coupling between mechanics and electrochemistry can be a useful tool in identifying battery aging. Here we investigate the relationship between stress and capacity fade in different types of commercial batteries under various cycling ranges. We identify individual contributions from stress-increasing mechanisms, such as film growth, and non-linear stress relaxation mechanisms. Different cycling ranges affect the average stress level inside the batteries, leading to varying levels of stress relaxation, which dominates the overall stress behavior initially, but gradually is overtaken by linear stress-increasing mechanisms at higher cycle number. The slopes of the linear film growth vary with cycling range and battery type, and we correlate these effects with both mechanical and electrochemical phenomena. Commercial batteries with different compositions exhibit qualitatively similar results on stress vs. state of health (SOH), but vary quantitatively due to differences in their mechanical properties, which can be identified through mechanical tests.
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U2 - 10.1149/2.1131610jes
DO - 10.1149/2.1131610jes
M3 - Article
AN - SCOPUS:84992220355
SN - 0013-4651
VL - 163
SP - A2501-A2507
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 13
ER -