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Processes
Volume 9
Issue 11
10.3390/pr9112009
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Article

Investigation of the Mechanical Behavior of Electrodes after Calendering and Its Influence on Singulation and Cell Performance

by
Dominik Mayer
1,*,
Ann-Kathrin Wurba
1,
Benjamin Bold
1,
Jonathan Bernecker
1,
Anna Smith
2 and
Jürgen Fleischer
1
1
wbk Institute of Production Science, Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131 Karlsruhe, Germany
2
Institute for Applied Materials (IAM), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
*
Author to whom correspondence should be addressed.
Processes 2021, 9(11), 2009; https://doi.org/10.3390/pr9112009
Submission received: 30 September 2021 / Revised: 29 October 2021 / Accepted: 30 October 2021 / Published: 10 November 2021
(This article belongs to the Special Issue Production Technologies for Lithium-Ion Battery Electrodes, Cells and Systems)
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Abstract

Battery cell production is a complex process chain with interlinked manufacturing processes. Calendering in particular has an enormous influence on the subsequent manufacturing steps and final cell performance. However, the effects on the mechanical properties of the electrode, in particular, have been insufficiently investigated. For this reason, the impact of different densification rates during calendering on the electrochemical cell performance of NMC811 (LiNi0.8Mn0.1Co0.1O2) half-cells are investigated to identify the relevant calendering parameters. Based on this investigation, an experimental design has been derived. Electrode elongations after calendering in and orthogonal to the running direction of the NMC811 cathode are investigated in comparison with a hard carbon anode after calendering. Elongations orthogonal to the machine direction are observed to have no major dependencies on the compaction rate during calendering. In the machine direction, however, significant elongation occurs as a dependency of the compaction rate for both the hard carbon anode and the NMC811. In addition, the geometric shape of the NMC811 electrodes after separation into individual sheets is investigated with regard to different compaction rates during calendering. It is shown that the corrugations that occur during calendering are propagated into the single electrode, depending on the compaction rate.
Keywords: electrode production; cell production; lithium-ion battery electrode production; cell production; lithium-ion battery

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MDPI and ACS Style

Mayer, D.; Wurba, A.-K.; Bold, B.; Bernecker, J.; Smith, A.; Fleischer, J. Investigation of the Mechanical Behavior of Electrodes after Calendering and Its Influence on Singulation and Cell Performance. Processes 2021, 9, 2009. https://doi.org/10.3390/pr9112009

AMA Style

Mayer D, Wurba A-K, Bold B, Bernecker J, Smith A, Fleischer J. Investigation of the Mechanical Behavior of Electrodes after Calendering and Its Influence on Singulation and Cell Performance. Processes. 2021; 9(11):2009. https://doi.org/10.3390/pr9112009

Chicago/Turabian Style

Mayer, Dominik, Ann-Kathrin Wurba, Benjamin Bold, Jonathan Bernecker, Anna Smith, and Jürgen Fleischer. 2021. "Investigation of the Mechanical Behavior of Electrodes after Calendering and Its Influence on Singulation and Cell Performance" Processes 9, no. 11: 2009. https://doi.org/10.3390/pr9112009

APA Style

Mayer, D., Wurba, A.-K., Bold, B., Bernecker, J., Smith, A., & Fleischer, J. (2021). Investigation of the Mechanical Behavior of Electrodes after Calendering and Its Influence on Singulation and Cell Performance. Processes, 9(11), 2009. https://doi.org/10.3390/pr9112009

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