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Composites of Ceramic High-Temperature Proton Conductors with Inorganic Compounds

2005; Electrochemical Society; Volume: 8; Issue: 4 Linguagem: Inglês

10.1149/1.1865592

1944-8775

T. Schober,

Inorganic Fluorides and Related Compounds

This work deals with composites of high-temperature proton conductors and inorganic compounds such as carbonates, hydroxides, and chlorides. Discontinuities were found in the vs. plots which are ascribed to superionic phase transitions occurring in the interface region between the constituent phases. A similar superionic phase transition was also found between a composite of a proton conductor and a prominent oxygen ion conductor. The results provide a natural explanation for the high conductivities recently reported for similar composites of oxygen ion conductors and such inorganic compounds [ B. Zhu , J. Power Sources , 114 , 1 (2003) ] and also explains the high current densities obtained in intermediate temperature fuel cells based on such composites.