Journalartikel

Jahr der Veröffentlichung: 2022

Seiten: 42757-42769

Zeitschrift: ACS Applied Materials & Interfaces

Bandnummer: 14

Heftnummer: 37

ISSN: 1944-8244

eISSN: 1944-8252

DOI Link: https://doi.org/10.1021/acsami.2c12991

Verlag: American Chemical Society

Abstract: 
A non-ideal contact at the electrode/solid electrolyte interface of a solid-state battery arising due to pores (voids) or inclusions results in a geometric 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 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.

Harvard-Zitierstil: Eckhardt, J., Fuchs, T., Burkhardt, S., Klar, P., Janek, J. and Heiliger, C. (2022) 3D Impedance Modeling of Metal Anodes in Solid-State Batteries-Incompatibility of Pore Formation and Constriction Effect in Physical-Based 1D Circuit Models, ACS Applied Materials & Interfaces, 14(37), pp. 42757-42769. https://doi.org/10.1021/acsami.2c12991

APA-Zitierstil: Eckhardt, J., Fuchs, T., Burkhardt, S., Klar, P., Janek, J., & Heiliger, C. (2022). 3D Impedance Modeling of Metal Anodes in Solid-State Batteries-Incompatibility of Pore Formation and Constriction Effect in Physical-Based 1D Circuit Models. ACS Applied Materials & Interfaces. 14(37), 42757-42769. https://doi.org/10.1021/acsami.2c12991