Minute Differences in Battery Geometry Explain Electrochemical Variability

ECS Meeting Abstracts 2026 Open access

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Authors: Alexis Geslin, Xiao Cui, Aki Takahashi, Devan Shaan Agrawal, Vivek Lam, Amariah Condon, Wanli Jia, James Sehnert, Troy A. Hayes, Simona Onori, Peter M. Attia, William C. Chueh
DOI: 10.1149/ma2026-016675mtgabs
Cited by: 0

Abstract

Device variability in high-volume manufacturing is intrinsic in many technologies. Such is the case in lithium-ion battery cells, where cell-to-cell electrochemical variations impact cell-to-pack integration and battery management systems. Here, we combine computer vision and 120-second X-ray computed tomography (CT) across 295 commercial 21700 cylindrical cells to explain and predict electrochemical performance variability, both at the beginning and end of life. Surprisingly, the cell electrochemical performances (varying by 0.51% in capacity and energy, by 4.32% in power, and by 10.6% in cycle life) correlate strongly to a single descriptor: eccentricity of the cylindrical steel cans (absolute values variations

Fields of Study & Subjects

Advanced Battery Technologies Research Fuel Cells and Related Materials

Publication details

Journal / source
ECS Meeting Abstracts
Publisher
The Electrochemical Society
Volume
MA2026-01
Issue
6
Pages
675–675
Publication date
7 July 2026