Improved high temperature performance of La0.8Sr0.2MnO3 cathode by addition of CeO2

► CeO2 addition in LSM cathode improves several times the power density generated by YSZ-electrolyte supported single cells co-sintered at 1350 °C. ► CeO2 addition in LSM modifies or reduces the La2Zr2O7 formation during the LSM-cathode and YSZ-electrolyte co-sintering at 1350 °C. ► 1350 °C corresponds to the highest LSM-cathode and YSZ-electrolyte co-sintering temperature showing reasonable power density (over hundred mW cm−2) and without using any buffer layer between them.