Determination of electronic and ionic partial conductivities of BaCeO3 with Yb and in doping

Sung Min Choi, Jong Heun Lee, Moon Bong Choi, Jongsup Hong, Kyung Joong Yoon, Byung Kook Kim, Hae Weon Lee, Jong Ho Lee

Research output: Contribution to journalArticle

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Abstract

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-δ, 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(O2) (-4 ≤ log P(O2) ≤ 0) and P(H2O) (-3.5 ≤log P(H2O)≤-1.5) at 700°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.

Original languageEnglish
Pages (from-to)F789-F795
JournalJournal of the Electrochemical Society
Volume162
Issue number7
DOIs
Publication statusPublished - 2015 Jan 1

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Doping (additives)
Protons
Cations
Positive ions
Oxygen
Electronegativity
Chemical stability
Oxygen vacancies
Charge carriers
Chemical analysis
Perovskite
Anions
Negative ions
Ions
Defects
Electric Conductivity

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

Choi, Sung Min ; Lee, Jong Heun ; Choi, Moon Bong ; Hong, Jongsup ; Yoon, Kyung Joong ; Kim, Byung Kook ; Lee, Hae Weon ; Lee, Jong Ho. / Determination of electronic and ionic partial conductivities of BaCeO3 with Yb and in doping. In: Journal of the Electrochemical Society. 2015 ; Vol. 162, No. 7. pp. F789-F795.
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Determination of electronic and ionic partial conductivities of BaCeO3 with Yb and in doping. / Choi, Sung Min; Lee, Jong Heun; Choi, Moon Bong; Hong, Jongsup; Yoon, Kyung Joong; Kim, Byung Kook; Lee, Hae Weon; Lee, Jong Ho.

In: Journal of the Electrochemical Society, Vol. 162, No. 7, 01.01.2015, p. F789-F795.

Research output: Contribution to journalArticle

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