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The Effect of Silicon Grade and Electrode Architecture on the Performance of Advanced Anodes for Next Generation Lithium-Ion Cells

Meyer, Alexandra ORCID iD icon; Ball, Fabian; Pfleging, Wilhelm ORCID iD icon

Abstract:

To increase the specific capacity of anodes for lithium-ion cells, advanced active materials, such as silicon, can be utilized. Silicon has an order of magnitude higher specific capacity compared to the state-of-the-art anode material graphite; therefore, it is a promising candidate to achieve this target. In this study, different types of silicon nanopowders were introduced as active material for the manufacturing of composite silicon/graphite electrodes. The materials were selected from different suppliers providing different grades of purity and different grain sizes. The slurry preparation, including binder, additives, and active material, was established using a ball milling device and coating was performed via tape casting on a thin copper current collector foil. Composite electrodes with an areal capacity of approximately 1.70 mAh/cm² were deposited. Reference electrodes without silicon were prepared in the same manner, and they showed slightly lower areal capacities. High repetition rate, ultrafast laser ablation was applied to these high-power electrodes in order to introduce line structures with a periodicity of 200 µm. The electrochemical performance of the anodes was evaluated as rate capability and operational lifetime measurements including pouch cells with NMC 622 as counter electrodes. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000141365
Veröffentlicht am 20.12.2021
Originalveröffentlichung
DOI: 10.3390/nano11123448
Scopus
Zitationen: 4
Web of Science
Zitationen: 3
Dimensions
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2079-4991
KITopen-ID: 1000141365
HGF-Programm 38.02.02 (POF IV, LK 01) Components and Cells
Erschienen in Nanomaterials
Verlag MDPI
Heft 11
Seiten 3448 (27 pages)
Projektinformation Next-Gen-3DBat (BMBF, EU 6. RP, 03XP0198F)
Bemerkung zur Veröffentlichung https://www.mdpi.com/2079-4991/11/12/3448
Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 20.12.2021
Schlagwörter lithium-ion battery, electrode development, silicon anode, laser patterning, electrochemical impedance spectroscopy, galvanostatic characterization
Nachgewiesen in Scopus
Web of Science
Dimensions
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