Low temperature synthesis of novel SrCe0.9Yb0.1O3−α-chlorides composite electrolytes for intermediate temperature protonic ceramics fuel cells

In this study, novel SrCe0.9Yb0.1O3−α-(Na/K)Cl and SrCe0.9Yb0.1O3−α-NaCl-BaCl2 composite electrolytes were synthesized at low temperature (750 °C). The structural properties of the composite electrolytes based on mixtures of SrCe0.9Yb0.1O3−α (SCY) and chlorides ((Na/K)Cl, NaCl-BaCl2) are characterized. The microstructure of the composite electrolytes are observed by scanning electron microscopy (SEM). The electrical conductivity is determined by impedance spectroscopy. The ionic conductivities of the composite electrolytes are higher than that of SCY. Finally, high-performance intermediate temperature fuel cells of the composite electrolytes are obtained.