A Review of Lithium-Ion Battery Electrode Drying: Mechanisms and Metrology

Yeshui Zhang* (Corresponding Author), Nicola E. Courtier, Zhenyu Zhang, Kailong Liu, Josh J. Bailey, Adam M. Boyce, Giles Richardson, Paul R. Shearing, Emma Kendrick* (Corresponding Author), Dan Brett* (Corresponding Author)

*Corresponding author for this work

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Abstract

Lithium-ion battery manufacturing chain is extremely complex with many controllable parameters especially for the drying process. These processes affect the porous structure and properties of these electrode films and influence the final cell performance properties. However, there is limited available drying information and the dynamics are poorly understood due to the limitation of the existing metrology. There is an emerging need to develop new methodologies to understand the drying dynamics to achieve improved quality control of the electrode coatings. A comprehensive summary of the parameters and variables relevant to the wet electrode film drying process is presented, and its consequences/effects on the finished electrode/final cell properties are mapped. The development of the drying mechanism is critically discussed according to existing modeling studies. Then, the existing and potential metrology techniques, either in situ or ex situ in the drying process are reviewed. This work is intended to develop new perspectives on the application of advanced techniques to enable a more predictive approach to identify optimum lithium-ion battery manufacturing conditions, with a focus upon the critical drying process.
Original languageEnglish
Article number2102233
Number of pages19
JournalAdvanced Energy Materials
Early online date28 Nov 2021
DOIs
Publication statusE-pub ahead of print - 28 Nov 2021

Keywords

  • drying mechanisms
  • electrode drying processes
  • in situ
  • metrology
  • LIBs

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