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Einfluss der Kompaktierung auf die Elektrodenmikrostruktur und elektrochemische Performance bei Lithium-Ionen-Zellen

Schmidt, Denny

Abstract (englisch):
Due to their technological advantages, lithium-ion-batteries have been established in stationary and mobile applications. In general, for electrochemical storage systems, there is a fundamental conflict between high energy density and temporal high power density for different applications. During the electrode production process, the material- and process-related parameters define the resulting cell properties. In the last step of the electrode manufacturing, the compaction process, a high volume fraction of active material is targeted at the expense of internal porosity. In contrast, porosity is essential for the cell functionality, especially for kinetic requirements. Thus, tailoring the microstructure of the electrode active material results in an effcient design for different applications.

The present work aims at investigating and correlating the microstructural changes by active mass compaction with the resulting electrochemical properties. For technologically favorable electrode active mass compositions, a wide compaction down to porosities of less than 20% was considered and electrochemically cycled between C/20 and 5C to map different applications. ... mehr

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Volltext §
DOI: 10.5445/IR/1000129746
Veröffentlicht am 22.02.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoff- und Biomechanik (IAM-WBM)
Publikationstyp Hochschulschrift
Publikationsdatum 22.02.2021
Sprache Deutsch
Identifikator KITopen-ID: 1000129746
Verlag Karlsruher Institut für Technologie (KIT)
Umfang 206 S.
Art der Arbeit Dissertation
Fakultät Fakultät für Maschinenbau (MACH)
Institut Institut für Angewandte Materialien - Werkstoff- und Biomechanik (IAM-WBM)
Prüfungsdatum 18.01.2021
Referent/Betreuer Prof. M. Kamlah
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
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