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Investigation of the mechanical behavior of electrodes after calendering and its influence on singulation and cell performance

Mayer, D.; Wurba, A.-K.; Bold, B.; Bernecker, J.; Smith, A.; Fleischer, J.


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 (LiNi$_{0.8}$Mn$_{0.1}$Co$_{0.1}$O$_{2}$) 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. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000140689
Veröffentlicht am 14.12.2021
DOI: 10.3390/pr9112009
Zitationen: 10
Web of Science
Zitationen: 9
Zitationen: 11
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Energiespeichersysteme (IAM-ESS)
Institut für Produktionstechnik (WBK)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 10.11.2021
Sprache Englisch
Identifikator ISSN: 2227-9717
KITopen-ID: 1000140689
HGF-Programm 38.02.02 (POF IV, LK 01) Components and Cells
Erschienen in Processes
Verlag MDPI
Band 9
Heft 11
Seiten Art.Nr. 2009
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagwörter electrode production; cell production; lithium-ion battery
Nachgewiesen in Dimensions
Web of Science
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