Development of mixed conductive materials for high — temperature electrochemical oxygen membranes

Abstract

Oxygen permeability of Lnf_xMxCo03s ( Dt = La, Pr, Nd, M = Sr, Ca, Bi, Pb, x = 0.0.9), SrCo,_xMexO}„s ( Me=Ti, Cr, Mn, Fe, Ni, Си, x = 0.0.5) and- SrCot х_уРехСиуОз г (x = 0. 0.5, у = 0..0.3) perovskite-like oxide ceramics, which are promising materials for high-temperature electrochemical oxygen membranes where matter is transferred owing to conjugate transport of oxide ions 0 1 and electrons through a gas-tight ceramic material, has been investigated. It is shown that complex oxides SrCoy xFexO, „ (x = 0.2.. 0.35) and Im\ xSrxCoOy.e (x = 0 65...0.75) having the highest oxide ionic conductivity can be used as materials for electrochemical oxygen membranes.