Journal article

Publication year: 2020

Pages: 12821-12833

Journal: ACS Applied Materials & Interfaces

Volume number: 12

Issue number: 11

ISSN: 1944-8244

DOI Link: https://doi.org/10.1021/acsami.9b22788

Publisher: American Chemical Society

Abstract: 
In the pursuit for future mobility, solid-state batteries open a wide held of promising battery concepts with a variety of advantages, ranging from energy density to power capability. However, trade-offs need to be addressed, especially for large-scale, cost-effective processing, which implies, the use of a polymeric binder in the composite electrodes. Here, investigate three-dimensional microstructure models of the active material, solid electrolyte, and binder to link cathode design and binder content with electrode performance. Focusing on lithium-ion transport, we evaluate the effective ionic conductivity and tortuosity in a flux-based simulation. Therein, we address the influence of electrode composition and active material particle size as well as the process-controlled design parameters of the void space and binder content. Even though added in small amounts, the latter has a strong negative influence on the ion transport paths and the active surface area. The simulation of ion transport within four-phase composites is supplemented by an estimation of the limiting current densities, illustrating that application-driven cell design starts at the microstructure level.

Harvard Citation style: Bielefeld, A., Weber, D. and Janek, J. (2020) Modeling Effective Ionic Conductivity and Binder Influence in Composite Cathodes for All-Solid-State Batteries, ACS Applied Materials & Interfaces, 12(11), pp. 12821-12833. https://doi.org/10.1021/acsami.9b22788

APA Citation style: Bielefeld, A., Weber, D., & Janek, J. (2020). Modeling Effective Ionic Conductivity and Binder Influence in Composite Cathodes for All-Solid-State Batteries. ACS Applied Materials & Interfaces. 12(11), 12821-12833. https://doi.org/10.1021/acsami.9b22788