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

Abstract

Lithium-ion battery manufacturing chain is extremely complex with many controlable 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 achive 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 mapped. The development of the drying mechanism is critically discussed according to existing modelling studies. Then, the existing and potential metrology techniques, either in-situ or ex-situ in the drying process are reviewed. It is the intension 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.

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Identifiers

ORCID for Nicola E Courtier: orcid.org/0000-0002-5714-1096

ORCID for Giles Richardson: orcid.org/0000-0001-6225-8590

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