Novel Protonic Conductor SrLa2Sc2O7 with Layered Structure for Electrochemical Devices

Abstract

Novel materials with target properties for different electrochemical energy conversion and storage devices are currently being actively created and investigated. Materials with high level of protonic conductivity are attracting attention as electrolytes for solid oxide fuel cells and electrolyzers. Though many materials are being investigated as potential electrolytic components for these devices, many problems exist, including comparability between electrodes and electrolytes. In this paper, layered perovskite SrLa2Sc2O7 was investigated as a protonic conductor for the first time. The possibility for water uptake and protonic transport was revealed. It was shown that the SrLa2Sc2O7 composition can be considered a prospective ionic conductor. The layered perovskites can be considered as very promising materials for electrochemical devices for energy applications.

Novel co-doped protonic conductors BaLa1.9Sr0.1In1.95M0.05O6.925 with layered perovskite structure

“…Currently, a large class of materials with the monolayer perovskite structure Ba(Sr)La(Nd)In(Sc)O4 [37][38][39][40][41] is described in terms of proton transport. The possibility of proton conductivity in bilayer AA′2B2O7 perovskites such as on BaLa2In2O7 [42][43][44], BaNd2In2O7 [45] and SrLa2Sc2O7 [46] and compositions based on them was described last year. It was shown that doping cationic sublattices can improve oxygen-ion and proton conductivity by up to 1.5 orders of magnitude [12].…”