ECI Digital Archives

Title

Proton uptake in the mixed ionic and electronic conductors Ba1-xSrxFeO3-d

Authors

Rotraut Merkle, MPI for Solid State Research, Germany
Maximilian F. Hoedl, MPI for Solid State Research, GermanyFollow
Denis Gryaznov, Institute for Solid State Physics, University of Latvia, Riga, Latvia
Eugene A. Kotomin, MPI for Solid State Research, Germany
Joachim Maier, Max Planck Institute for Solid State Research, Stuttgart, Germany

Conference Dates

March 10-14, 2019

Abstract

Cathode materials for proton-conducting ceramic fuel cells (PCFC) should combine electronic conductivity with adequate proton conductivity and thereby extend the water formation process from the triple phase boundary to the entire surface of the porous cathode. A variety of such materials including perovskite-structured Ba_0.95La_0.05FeO₃ has been studied experimentally with regard to proton uptake, revealing a systematically lower proton concentration than in electrolyte materials and a peculiar interaction between electronic charge carriers (i.e. holes) and ionic charge carriers (i.e. protons). [1]

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Recommended Citation

Rotraut Merkle, Maximilian F. Hoedl, Denis Gryaznov, Eugene A. Kotomin, and Joachim Maier, "Proton uptake in the mixed ionic and electronic conductors Ba1-xSrxFeO3-d" in "Nonstoichiometric Compounds VII", ECI Symposium Series, (2019). https://dc.engconfintl.org/nonstoichiometric_vii/18