Proton conductor, solid electrolyte layer for fuel cell, cell structure and fuel cell comprising the same

摘要

The solid electrolyte layer has a perovskite structure and has the following formula (1): BaxZryCezM1- (y + z) O3-δ (wherein the element M is Y, Yb, Er, Ho, Tm, Gd, and Sc) At least one selected from the group consisting of: 0.85 ≦ x 0.98, 0.70 ≦ y + z 1.00, and the ratio y / z is 0.5 / 0.5 to 1/0 , Δ is an oxygen deficiency amount).