“…As objects of studies, we chose sulfide conducting SEs based on CaYb 2 S 4 and BaSm 2 S 4 belonging to the class of alkaline earth thiolanthanates, which can be sulfide ion conductors [1,2]. The influence of the method for the preparation of oxide precursors on the temperature range of sulfide phases, their morphology, and electrophysical and electrochemical properties was studied.…”