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Virtual Electrode Design for Lithium-Ion Battery Cathodes

Joos, Jochen; Buchele, Alexander; Schmidt, Adrian; Weber, André; Ivers-Tiffée, Ellen

Abstract:
Microstructural characteristics of lithium‐ion battery cathodes determine their performance. Thus, modern simulation tools are increasingly important for the custom design of multiphase cathodes. This work presents a new method for generating virtual, yet realistic cathode microstructures. A precondition is a 3D template of a commercial cathode, reconstructed via focused ion beam/scanning electron microscopy (FIB/SEM) tomography and appropriate algorithms. The characteristically shaped micrometer‐sized active material (AM) particles and agglomerates of nano‐sized carbon‐binder (CB) particles are individually extracted from the voxel‐based templates. Thereby, a library of roughly 1100 AM particles and 20 CB agglomerates is created. Next, a virtual cathode microstructure is predefined, and representative sets of AM particles and CB agglomerates are built. The following re‐assembly of AM particles within a predefined volume box works using dropping and rolling algorithms. Thereby, one can generate cathodes with specified characteristics, such as the volume fraction of AM, CB and pore space, particle‐size distributions, and gradients thereof. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000129551
Veröffentlicht am 10.02.2021
Originalveröffentlichung
DOI: 10.1002/ente.202000891
Web of Science
Zitationen: 1
Dimensions
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffe der Elektrotechnik (IAM-WET)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2194-4288, 2194-4296
KITopen-ID: 1000129551
Erschienen in Energy technology
Verlag Wiley-VCH Verlag
Seiten Art.-Nr.: 2000891
Nachgewiesen in Dimensions
Scopus
Web of Science
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