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Capacity Fade in Lithium-Ion Batteries and Cyclic Aging over Various State-of-Charge Ranges

Gantenbein, Sophia; Schönleber, Michael; Weiss, Michael; Ivers-Tiffée, Ellen

Abstract:
In order to develop long-lifespan batteries, it is of utmost importance to identify the relevant aging mechanisms and their relation to operating conditions. The capacity loss in a lithium-ion battery originates from (i) a loss of active electrode material and (ii) a loss of active lithium. The focus of this work is the capacity loss caused by lithium loss, which is irreversibly bound to the solid electrolyte interface (SEI) on the graphite surface. During operation, the particle surface suffers from dilation, which causes the SEI to break and then be rebuilt, continuously. The surface dilation is expected to correspond with the well-known graphite staging mechanism. Therefore, a high-power 2.6 Ah graphite/LiNiCoAlO2 cell (Sony US18650VTC5) is cycled at different, well-defined state-of-charge (SOC) ranges, covering the different graphite stages. An open circuit voltage model is applied to quantify the loss mechanisms (i) and (ii). The results show that the lithium loss is the dominant cause of capacity fade under the applied conditions. They experimentally prove the important influence of the graphite stages on the lifetime of a battery. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000100585
Veröffentlicht am 06.12.2019
Originalveröffentlichung
DOI: 10.3390/su11236697
Scopus
Zitationen: 2
Web of Science
Zitationen: 3
Dimensions
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffe der Elektrotechnik (IAM-WET)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 2071-1050
KITopen-ID: 1000100585
Erschienen in Sustainability
Verlag MDPI
Band 11
Heft 23
Seiten Article no: 6697
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Gefördert vom Ministerium für Wissenschaft, Forschung und Kunst Baden-Württemberg (MWK) im Rahmen des Open-Access-Förderprogramms "BW BigDIWA"
Vorab online veröffentlicht am 26.11.2019
Schlagwörter cyclic aging; capacity fade; active lithium loss; graphite staging mechanism; graphite particle dilation; open circuit voltage model
Nachgewiesen in Scopus
Dimensions
Web of Science
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