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The effect of compressive stresses on a silicon electrode's cycle life in a Li-ion battery

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dc.abstract.enLithium-ion cells are currently very promising electrochemical power sources. New high-capacity electrodes made from silicon are currently under intensive study. As well as its high capacity, silicon undergoes a significant volume increase (up to 300%) during lithiation. This leads to the generation of internal stresses and fast cell degradation due to active material pulverization and separation from the current collector. Stress formation and its effect on silicon lithiation has been theoretically investigated by many researchers. It has been shown that internal compressive stress can slow down or stop silicon lithiation. In our study we applied external stress to an electrode active layer and measured the cell electrochemical parameters: capacity, cycle life, and charge transfer resistance. In contrast with theoretical estimations we observed an increase in capacity and cycle life when high compressive stress was applied. We believe this behavior is related to stress-induced lithiation front slowdown, which entails a longer stress relaxation period and as a consequence improves the cell parameters.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorKrajewski, Michał
dc.contributor.authorRatyński, Maciej
dc.contributor.authorHamankiewicz, Bartosz
dc.contributor.authorCzerwiński, Andrzej
dc.contributor.authorBoczar, Maciej
dc.date.accessioned2024-01-26T10:11:18Z
dc.date.available2024-01-26T10:11:18Z
dc.date.copyright2018-06-20
dc.date.issued2018
dc.description.accesstimeAT_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number40
dc.description.versionFINAL_PUBLISHED
dc.description.volume8
dc.identifier.doi10.1039/C8RA02456A
dc.identifier.issn2046-2069
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/122179
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofRSC Advances
dc.relation.pages22546-22551
dc.rightsCC-BY-NC
dc.sciencecloudnosend
dc.titleThe effect of compressive stresses on a silicon electrode's cycle life in a Li-ion battery
dc.typeJournalArticle
dspace.entity.typePublication