Communication—Why High-Precision Coulometry and Lithium Plating Studies on Commercial Lithium-Ion Cells Require Thermal Baths

Aragon Zulke, Alana and Li, Yi and Keil, Peter and Hoster, Harry (2019) Communication—Why High-Precision Coulometry and Lithium Plating Studies on Commercial Lithium-Ion Cells Require Thermal Baths. Journal of The Electrochemical Society, 166 (13). A2921-A2923. ISSN 0013-4651

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Abstract

We demonstrate how insufficient heat transport in environmental chambers compromises the meaningfulness of high-precision charge counting and leads to an underestimation of lithium plating in fast-charged lithium-ion batteries. Direct-contact liquid cooling of cylindrical cells excludes temperature fluctuations observed in thermal chambers and restricts self-heating to 2 K in comparison to the 14 K in thermal chambers, under 1.5 C-rate cycling. Our thermal-electrochemical model replicated well the experimental results. For high-precision coulometric studies to be meaningful and more comparable across different laboratories, especially for large-format and high-power cells, direct-contact cooling in thermal baths must become the new standard.

Item Type:
Journal Article
Journal or Publication Title:
Journal of The Electrochemical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2100/2105
Subjects:
ID Code:
136991
Deposited By:
Deposited On:
28 Apr 2020 09:20
Refereed?:
Yes
Published?:
Published
Last Modified:
06 Jul 2020 01:41