Investigation on thermal, electrical, and electrochemical properties of scandium-doped Pr0.6Sr0.4(Co0.2Fe0.8)(1−x)ScxO3−δ as cathode for IT-SOFC

► Scandium doped Pr0.6Sr0.4Co0.2Fe0.8O3-δ was evaluated as cathode of IT'SOFC. ► The doped products Pr0.6Sr0.4(Co0.2Fe0.8)(1-x)ScxO3-δ (PSCFSx) showed smaller particles. ► The conductivity and thermal expansion coefficients of PSCFSx (x = 0.0∼0.2) decreased as raising x. ► PSCFSx (x ≤ 0.1) exhibited better cathode performance than PSCF and PSCFSx (x > 0.1) did. ► The function of Sc3+ dopant was tentatively elucidated and discussed.