EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

Argyrodite-type materials show very promising properties as solid electrolytes. Li6PS5X (X = Cl, Br, I) has attracted considerable interest and many groups tried to improve the already high ionic conductivity. Recent attempts explored the substitution of Phosphorus by Germanium, which allowed a higher Li-content in Li6PS5I.1 Substitution resulted in increased ionic conductivity, however, the...

LnVO4 orthovanadates attract attention as prospective materials for electrochemical applications, in particular, as redox-reversible electrode components for solid oxide fuel cells (SOFC) [1,2]. One important advantage of LnVO4-derived components of SOFC anodes is their good resistance to carbon deposition and sulphur-containing impurities which is critical for hydrocarbon-fueled SOFCs. The...

Ionomers are ion-conducting polymers with a nanophase separated morphology, including hydrophobic polymer domains and hydrophilic ionic clusters. Ionomers present a high ionic conductivity and negligible electronic conductivity and are used as separators in various electrochemical energy technologies, such as polymer membrane fuel cells or redox flow batteries.
The ionic groups are grafted on...

Lithium fluoride, known to be a very poor ionic conductor, was chosen as a model substance to investigate the influence of the insulator TiO2 on ion dynamics in LiF. In general, in such two-phase systems percolating Li pathways at the conductor | insulator interface may lead to enhanced ion dynamics. Indeed, we observed such an effect which we investigated by impedance spectroscopy and Nuclear...

The Y-halides Li3YBr6 and Li3YCl6 were recently considered as potential electrolytes for all-solid-state batteries [1] as they exhibit sufficiently high ionic conductivities at room temperature. The aim of this study [2] is to elucidate the relationship between several parameters such as the morphology, defects and size effects on the Li ion hopping processes in Li3YBr6. Here, the ternary...