Membrane electrode assembly, electrochemical cell, and fuel cell system

Abstract

A membrane electrode assembly of the present disclosure is a membrane electrode assembly including a first electrode and an electrolyte membrane that contains an oxide having proton conductivity, in which the first electrode contains a first oxide and a second oxide, the first oxide is a first perovskite compound represented by Compositional Formula ABO3, where in the first perovskite compound, constituent elements of an A site include at least one selected from the group consisting of La, Sr, and Ba, and constituent elements of a B site include at least one selected from the group consisting of Co and Fe, and the second oxide is a second perovskite compound formed of Ba, Zr, Yb, one or more of first transition elements including at least Co, and O.

Dependencies are inferred from the claim text.