A-site deficient semiconductor electrolyte Sr_1-x Co _x FeO_3-δ for low-temperature (450-550 °C) solid oxide fuel cells.

ABSTRACT: Fast ionic conduction at low operating temperatures is a key factor for the high electrochemical performance of solid oxide fuel cells (SOFCs). Here an A-site deficient semiconductor electrolyte Sr_1-x Co _x FeO_3-δ is proposed for low-temperature solid oxide fuel cells (LT-SOFCs). A fuel cell with a structure of Ni/NCAL-Sr_0.7Co_0.3FeO_3-δ -NCAL/Ni reached a promising performance of 771 mW cm^-2 at 550 °C. Moreover, appropriate doping of cobalt at the A-site resulted in enhanced charge carrier transportation yielding an ionic conductivity of >0.1 S cm^-1 at 550 °C. A high OCV of 1.05 V confirmed that neither short-circuiting nor power loss occurred during the operation of the prepar

SUBMITTER: Lu Y 

PROVIDER: S-EPMC9426435 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature