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High-capacity Li4Ti5O12-C thick ceramic electrodes manufactured by powder injection moulding

Romero-Garcia, I.; Sotomayor, M. E.; Levenfeld, B.; Varez, A.; Varzi, A. ORCID iD icon 1; Kim, G. T. 1; Passerini, S. 1
1 Helmholtz-Institut Ulm (HIU), Karlsruher Institut für Technologie (KIT)

Abstract:

Lithium-ion batteries are the most efficient electrochemical energy storage devices. However, there is still room for improvement in terms of safety and energy density, presently limited by conventional tape-casting electrode processing. In this study, a blend of the anodic material Li$_{4}$Ti$_{5}$O$_{12}$ with 2 wt% carbon black has been processed through powder injection moulding (PIM) yielding, after subsequent debinding and sintering processes, to ultra-thick (>500 µm) ceramic binder-free electrodes. The mixture of Li$_{4}$Ti$_{5}$O$_{12}$ with the thermoplastic binder composed of polypropylene, paraffin wax, and stearic acid is investigated to identify a rheologically suitable feedstock for the PIM process. The resulting disk-type green parts contain 50 vol% of ceramic powder. After removing the binder with solvents and subsequent thermal treatment, the parts are sintered at 900 °C, aiming for a relatively high porosity, i.e., 25.7%. The resulting electrodes show very high areal and volumetric capacities up to 26.0 mA·h·cm−2 and 403 mA·h·cm−3 at C/24, respectively, in a half-cell against lithium metal.


Verlagsausgabe §
DOI: 10.5445/IR/1000162841
Veröffentlicht am 09.10.2023
Originalveröffentlichung
DOI: 10.1016/j.jeurceramsoc.2023.09.030
Scopus
Zitationen: 2
Web of Science
Zitationen: 1
Dimensions
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 0955-2219, 1873-619X
KITopen-ID: 1000162841
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Journal of the European Ceramic Society
Verlag Elsevier
Band 44
Heft 2
Seiten 978-985
Vorab online veröffentlicht am 13.09.2023
Nachgewiesen in Scopus
Dimensions
Web of Science
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Globale Ziele für nachhaltige Entwicklung Ziel 7 – Bezahlbare und saubere Energie
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