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dc.contributor.authorEckhardt, Janis K.
dc.contributor.authorFuchs, Till
dc.contributor.authorBurkhardt, Simon
dc.contributor.authorKlar, Peter J.
dc.contributor.authorJanek, Jürgen
dc.contributor.authorHeiliger, Christian
dc.description.abstractA non-ideal contact at the electrode/solid electrolyte interface of a solid-state battery arising due to pores (voids) or inclusions results in a constriction effect that severely deteriorates the electric transport properties of the battery cell. The lack of understanding of this phenomenon hinders the optimization process of novel components, such as reversible and high-rate metal anodes. Deeper insight into the constriction phenomenon is necessary to correctly monitor interface degradation and to accelerate the successful use of metal anodes in solid-state batteries. Here, we use a 3D electric network model to study the fundamentals of the constriction effect. Our findings suggest that dynamic constriction as a non-local effect cannot be captured by conventional 1D equivalent circuit models and that its electric behavior is not ad hoc predictable. It strongly depends on the interplay of the geometry of the interface causing the constriction and the microscopic transport processes in the adjacent phases. In the presence of constriction, the contribution from the non-ideal (porous) electrode/solid electrolyte interface to the impedance spectrum may exhibit two signals that cannot be explained when the porous interface is described by a physical-based (effective medium theory) 1D equivalent circuit model. In consequence, the widespread assumption of a single interface contribution to the experimental impedance spectrum may be entirely misleading and can cause serious misinterpretation.de_DE
dc.description.sponsorshipDeutsche Forschungsgemeinschaft (DFG); ROR-ID:018mejw64de_DE
dc.description.sponsorshipBundesministerium für Bildung und Forschung (BMBF); ROR-ID:04pz7b180de_DE
dc.rightsIn Copyright*
dc.subjectreversible metal anodede_DE
dc.subjectinterface morphologyde_DE
dc.subjectpore formationde_DE
dc.subjectcurrent constrictionde_DE
dc.subjectimpedance spectroscopyde_DE
dc.subjectsolid-state batteryde_DE
dc.subjectsolid electrolytede_DE
dc.subjectelectric network modelde_DE
dc.title3D Impedance Modelling of Metal Anodes in Solid-State Batteries − Incompatibility of Pore Formation and Constriction Effect in Physical-Based 1D Circuit Modelsde_DE
local.affiliationFB 07 - Mathematik und Informatik, Physik, Geographiede_DE
local.projectDFG Research Training Group 2204de_DE
local.commentThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © 2022 The Authors. Published by American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
local.source.journaltitleACS Applied Materials & Interfacesde_DE

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