(Y0.5In0.5)Ba(Co,Zn)4O7 cathodes with superior high-temperature phase stability for solid oxide fuel cells

(Y0.5In0.5)BaCo4−xZnxO7 (1.0 ≤ x ≤ 2.0) oxides crystallizing in a trigonal P31c structure have been explored as alternative cathode materials for solid oxide fuel cells (SOFC). At a given Zn content, the (Y0.5In0.5)BaCo4−xZnxO7 compositions exhibit superior phase stability compared to YBaCo4−xZnxO7 and InBaCo4−xZnxO7 at the operating temperatures of SOFC (600–800 °C). In the (Y0.5In0.5)Ba(Co4−xZnx)O7 system, the x = 1 sample offers a …