Proton-conducting barium stannate for high-temperature purposes: A brief review

Solid oxide fuel cells (SOFCs) are highly efficient energy conversion devices. However, the use of traditional yttria-stabilized zirconia materials for SOFC electrolytes requires high operating temperatures, which limits their lifetime. Although serious efforts have been made to develop proton-conducting electrolyte materials as means for reducing SOFC operating temperatures, the design of materials that combine high conductivity with good tolerance towards aggressive operating conditions continues to present a significant challenge. This study pre-sents a detailed analysis of the ceramic features, synthesis conditions, chemical stability, electrical transport, and hydration properties of a cubic perovskite oxide of barium stannate recently identified as a suitable material for proton-conducting electrolytes. The presented analysis confirms that BaSnO3-based oxides can be considered alongside existing classes of proton-conducting materials as comprising a relatively new class of ceramic ma-terials for various electrochemical applications.

Automated summary

Solid oxide fuel cells are efficient energy conversion devices, but the traditional yttria-stabilized zirconia materials used for electrolytes require high temperatures. This study analyzes the potential of barium stannate as a proton-conducting electrolyte material and confirms its suitability.