Journalartikel

Jahr der Veröffentlichung: 2023

Seiten: 2324-2339

Zeitschrift: Matter

Bandnummer: 6

Heftnummer: 7

ISSN: 2590-2393

eISSN: 2590-2385

Open Access Status: Bronze

DOI Link: https://doi.org/10.1016/j.matt.2023.04.022

Verlag: Cell Press

Abstract: 

The high impedance of the solid electrolyte (SE)|cathode activematerial (CAM) interface often limits the charge transfer in oxide-based solid-state battery (SSB) cells. Lowering the interfacial impedance by maximizing the contact between SE and CAM is usually attempted by co-sintering the materials at elevated temperatures. In this work Li6.25Al0.25La3Zr2O12 (LLZO) and LiNi0.6Co0.2Mn0.2O2 (NCM) composite cathodes co-sintered at different temperatures were investigated by employing various transmission electron microscopy (TEM) techniques to study the influence of the sintering temperature on the material’s integrity. High-resolution TEM images of the layered NCM phase (R3m) degraded to a NiO (rock salt)-like structure (Fm3m), as well as the formation of a LaNiO3-like transition phase between LLZO and NCM grains in direct contact, are presented for samples co-sintered at a temperature as low as 500
C. This is significantly lower than previously reported and questions the viability of an LLZO-NCM composite cathode.

Harvard-Zitierstil: Demuth, T., Fuchs, T., Walther, F., Pokle, A., Ahmed, S., Malaki, M., et al. (2023) Influence of the sintering temperature on LLZO-NCM cathode composites for solid-state batteries studied by transmission electron microscopy, Matter, 6(7), pp. 2324-2339. https://doi.org/10.1016/j.matt.2023.04.022

APA-Zitierstil: Demuth, T., Fuchs, T., Walther, F., Pokle, A., Ahmed, S., Malaki, M., Beyer, A., Janek, J., & Volz, K. (2023). Influence of the sintering temperature on LLZO-NCM cathode composites for solid-state batteries studied by transmission electron microscopy. Matter. 6(7), 2324-2339. https://doi.org/10.1016/j.matt.2023.04.022