Communication—Why High-Precision Coulometry and Lithium Plating Studies on Commercial Lithium-Ion Cells Require Thermal Baths. Issue 13 (26th August 2019)

• Record Type: Journal Article
• Authors: Zülke, Alana; Li, Yi; Keil, Peter; Hoster, Harry
• Is Part Of: Journal of the Electrochemical Society. Volume 166:Issue 13(2019)
• Page Start: A2921
• Page End: A2923
• Publication Date: 2019-08-26
• Subjects: Batteries - Lithium -- Electrode Kinetics -- Energy Storage -- high-precision coulometry -- lithium-ion batteries -- thermal management; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0841913jes
• Languages: English
• ISSNs: 0013-4651

Abstract

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.