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The role of lamination conditions on the electrochemical behaviour of NMC811/graphite cells

Year: 2025
Type: article
Abstract: The lamination process between electrodes and separator is a crucial step in manufacturing lithium-ion cells, with a direct impact on production yield and electrochemical performance. In this study, a systematic analysis of the effect of two lamination parameters, temperature and pressure, on NMC811/graphite full cells was conducted. The impact of the lamination process on the separator properties was evaluated through permeability test, ionic conductivity, and morphological analyses. The results showed a dual effect: modification of the porous structure of the separator, as a function of the lamination conditions, with variations in the permeability and ionic conductivity of the system. At the full cell level, the most extreme lamination conditions led to a higher initial Coulombic efficiency, better wettability, lower data dispersion and a significant reduction in internal resistance. Furthermore, better performance at high C-rates and a higher capacity retention after 100 cycles were observed. This study confirms that a systematic optimization of the lamination can improve the electrochemical stability and reliability of the cells, depending on the materials chosen, and potentially reduce production scrap. • Lamination improves electrode/separator interfacial contact and ion transport • Higher lamination conditions (90 °C, 25 N/mm) improve I.C.E. and cycling efficiency • Laminated cells demonstrated improved rate capability and higher specific capacity • Lamination led to better capacity retention after prolonged cycling at 1C • Lamination reduces data variability and increases cell stability
DOI: 10.1016/j.est.2025.118584
Authors: Daniele Versaci, Silvio Fugattini, Michele Serri, Andrea Moselli, Julia Amici, Silvia Bodoardo
Language: English
Open Access status: hybrid
Estimated APC paid: $3,560
OpenAlex ID: W7084090947
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Cites: 31
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