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Multi-scale quantification and modeling of aged nanostructured silicon-based composite anodes

Vorauer, T.; Kumar, P.; Berhaut, C. L.; Chamasemani, F. F.; Jouneau, P.-H.; Aradilla, D.; Tardif, S.; Pouget, S.; Fuchsbichler, B.; Helfen, Lukas 1; Atalay, S.; Widanage, W. D.; Koller, S.; Lyonnard, S.; Brunner, R.
1 Institut für Photonenforschung und Synchrotronstrahlung (IPS), Karlsruher Institut für Technologie (KIT)

Abstract:

dvanced anode material designs utilizing dual phase alloy systems like Si/FeSi2 nano-composites show great potential to decrease the capacity degrading and improve the cycling capability for Lithium (Li)-ion batteries. Here, we present a multi-scale characterization approach to understand the (de-)lithiation and irreversible volumetric changes of the amorphous silicon (a-Si)/crystalline iron-silicide (c-FeSi2) nanoscale phase and its evolution due to cycling, as well as their impact on the proximate pore network. Scattering and 2D/3D imaging techniques are applied to probe the anode structural ageing from nm to μm length scales, after up to 300 charge-discharge cycles, and combined with modeling using the collected image data as an input. We obtain a quantified insight into the inhomogeneous lithiation of the active material induced by the morphology changes due to cycling. The electrochemical performance of Li-ion batteries does not only depend on the active material used, but also on the architecture of its proximity.

Zugehörige Institution(en) am KIT Institut für Photonenforschung und Synchrotronstrahlung (IPS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2399-3669
KITopen-ID: 1000125653
HGF-Programm 56.03.20 (POF III, LK 01) Nanoscience a.Material f.Inform.Technol.
Erschienen in Communications chemistry
Verlag Springer Nature
Band 3
Heft 1
Seiten Art.-Nr.: 141
Nachgewiesen in Web of Science
Dimensions
OpenAlex
Scopus
Globale Ziele für nachhaltige Entwicklung Ziel 7 – Bezahlbare und saubere Energie

Verlagsausgabe §
DOI: 10.5445/IR/1000125653
Veröffentlicht am 04.11.2020
Originalveröffentlichung
DOI: 10.1038/s42004-020-00386-x
Scopus
Zitationen: 31
Web of Science
Zitationen: 27
Dimensions
Zitationen: 44
Seitenaufrufe: 197
seit 05.11.2020
Downloads: 151
seit 05.11.2020
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