Choi, Sung Min Lee, Jong-Heun Choi, Moon-Bong Hong, Jongsup Yoon, Kyung Joong Kim, Byung-Kook Lee, Hae-Weon Lee, Jong-Ho 2024-01-20T07:03:35Z 2024-01-20T07:03:35Z 2021-09-05 2015-05 0013-4651 https://pubs.kist.re.kr/handle/201004/125482 The total electrical conductivity of BaCeO3-based proton conductors with various dopants was measured using a DC-4 probe method. Yb and In were used as dopants to increase electrical conductivity and chemical stability, respectively. The electronic and ionic partial conductivities of samples of various compositions, i.e., BaCe1-x-yYbxInyO3-delta, where x = 0.1, y = 0.00, 0.05, and 0.10 (BC10Yb, BC10Yb05In, and BC10Yb10In, respectively) and x = 0.15, y = 0.00 (BC15Yb), were calculated based on the relevant defect chemistry model and interpreted as functions of fairly extensive ranges of P(O-2) (-4 <= log P(O-2) <= 0) and P(H2O) (-3.5 <= log P(H2O) <= 1.5) at 700 degrees C. The partial conductivities of all charge carriers, i.e., protons, holes, and oxygen vacancies, increased with Yb doping but decreased as In doping increased. The variations in the partial conductivity of holes and protons induced by the composition of doping constituents can be explained by the difference in electronegativity between dopant cations and oxygen anions as well as A- and B-site cations that are most critical in a general hopping conduction mechanism. Oxygen ion conductivity is controlled by the dopant size and content, which generally alter the lattice spacing and distortion of the perovskite structure. (C) 2015 The Electrochemical Society. All rights reserved. English ELECTROCHEMICAL SOC INC DEFECT STRUCTURE-ANALYSIS FUEL-CELL APPLICATIONS ELECTRICAL-CONDUCTIVITY CHEMICAL-STABILITY PROTON CONDUCTORS TRANSPORT-PROPERTIES SOLID-SOLUTIONS BARIUM CERATE OXIDES ELECTROLYTES Determination of Electronic and Ionic Partial Conductivities of BaCeO3 with Yb and In Doping Article 10.1149/2.0011508jes 1 JOURNAL OF THE ELECTROCHEMICAL SOCIETY, v.162, no.7, pp.F789 - F795 JOURNAL OF THE ELECTROCHEMICAL SOCIETY 162 7 F789 F795 scie scopus 000355643700092 2-s2.0-84928895222 Electrochemistry Materials Science, Coatings & Films Electrochemistry Materials Science Article DEFECT STRUCTURE-ANALYSIS FUEL-CELL APPLICATIONS ELECTRICAL-CONDUCTIVITY CHEMICAL-STABILITY PROTON CONDUCTORS TRANSPORT-PROPERTIES SOLID-SOLUTIONS BARIUM CERATE OXIDES ELECTROLYTES