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dc.contributor.authorMeca, Esteban
dc.contributor.authorMünch, Andreas
dc.contributor.authorWagner, Barbara
dc.description.abstractIn this study we revisit experiments by Sethuraman et al. [J. Power Sources, 195, 5062 (2010)] on the stress evolution during the lithiation/delithiation cycle of a thin film of amorphous silicon. Based on recent work that show a two-phase process of lithiation of amorphous silicon, we formulate a phase-field model coupled to elasticity in the framework of Larché-Cahn. Using an adaptive nonlinear multigrid algorithm for the finite-volume discretization of this model, our two-dimensional numerical simulations show the formation of a sharp phase boundary between the lithiated and the amorphous silicon that continues to move as a front through the thin layer. We show that our model captures the non-monotone stress loading curve and rate dependence, as observed in recent experiments and connects characteristic features of the curve with the stucture formation within the layer. We take advantage of the thin film geometry and study the corresponding one-dimensional model to establish the dependence on the material parameters and obtain a comprehensive picture of the behaviour of the system.en
dc.subject.ddc510 Mathematiken
dc.subject.otherphase separationen
dc.subject.otherLi-ion batteriesen
dc.subject.otherstrain energyen
dc.subject.otherthin filmen
dc.subject.otherphase-field modellingen
dc.titleThin-film electrodes for high-capacity lithium-ion batteries: Influence of phase transformations on stressen
dc.typeResearch Paperen
tub.publisher.universityorinstitutionTechnische Universität Berlinen
tub.series.issuenumber2016, 05en
tub.series.namePreprint-Reihe des Instituts für Mathematik, Technische Universität Berlinen
tub.affiliationFak. 2 Mathematik und Naturwissenschaften » Inst. Mathematikde
tub.subject.msc200074N20 Dynamics of phase boundariesen
tub.subject.msc200074A50 Structured surfaces and interfaces, coexistent phasesen
Appears in Collections:Technische Universität Berlin » Publications

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