Mixed oxide ion and hole conductivity in Pr2-αNi 0.76-xCu0.24GaxO4+δ membrane

Tatsumi Ishihara; Nuansaeng Sirikanda; Kunihiko Nakashima; Shogo Miyoshi; Hiroshige Matsumoto

doi:10.1149/1.3251004

Mixed oxide ion and hole conductivity in Pr_2-αNi _0.76-xCu_0.24Ga_xO_4+δ membrane

Tatsumi Ishihara, Nuansaeng Sirikanda, Kunihiko Nakashima, Shogo Miyoshi, Hiroshige Matsumoto

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

The mixed conductivity and oxygen permeation properties of Pr-deficient Pr_1.9Ni_0.71Cu_0.24M_0.05O _4+δ (M = In,Ga,Al,Ni) were investigated. Among the dopants studied, the Ga-doped membrane was a superior mixed conductor, and it exhibited a high oxygen permeation rate compared with that of the other compositions. Examinations of membranes with different Ga concentrations revealed that the A-site cation-deficient composition, Pr_1.9Ni_0.71Cu _0.24Ga_0.05O_4+δ, had the highest permeability of 286 μmol min^-1 cm^-2 (ca. 7 cm ³ min^-1 cm^-2) from air to He at 1273 K in a 0.5 mm thick membrane. The oxygen permeation rate of Pr_1.9Ni _0.71Cu_0.24Ga_0.05O_4+δ decreased with thickness, indicating that the limiting factor is oxygen diffusivity in bulk. The Seebeck coefficient and oxygen permeation measurements suggest that the Ga dopant and Pr deficiency decreased the charge carrier density and improved the oxide ion conductivity. The estimated oxide ion conductivity in this material is a few times higher than that of the conventional mixed conductors such as Co-based perovskite.

Original language	English
Journal	Journal of the Electrochemical Society
Volume	157
Issue number	1
DOIs	https://doi.org/10.1149/1.3251004
Publication status	Published - Jan 1 2010

All Science Journal Classification (ASJC) codes

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

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10.1149/1.3251004

Cite this

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title = "Mixed oxide ion and hole conductivity in Pr2-αNi 0.76-xCu0.24GaxO4+δ membrane",

abstract = "The mixed conductivity and oxygen permeation properties of Pr-deficient Pr1.9Ni0.71Cu0.24M0.05O 4+δ (M = In,Ga,Al,Ni) were investigated. Among the dopants studied, the Ga-doped membrane was a superior mixed conductor, and it exhibited a high oxygen permeation rate compared with that of the other compositions. Examinations of membranes with different Ga concentrations revealed that the A-site cation-deficient composition, Pr1.9Ni0.71Cu 0.24Ga0.05O4+δ, had the highest permeability of 286 μmol min-1 cm-2 (ca. 7 cm 3 min-1 cm-2) from air to He at 1273 K in a 0.5 mm thick membrane. The oxygen permeation rate of Pr1.9Ni 0.71Cu0.24Ga0.05O4+δ decreased with thickness, indicating that the limiting factor is oxygen diffusivity in bulk. The Seebeck coefficient and oxygen permeation measurements suggest that the Ga dopant and Pr deficiency decreased the charge carrier density and improved the oxide ion conductivity. The estimated oxide ion conductivity in this material is a few times higher than that of the conventional mixed conductors such as Co-based perovskite.",

author = "Tatsumi Ishihara and Nuansaeng Sirikanda and Kunihiko Nakashima and Shogo Miyoshi and Hiroshige Matsumoto",

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T1 - Mixed oxide ion and hole conductivity in Pr2-αNi 0.76-xCu0.24GaxO4+δ membrane

AU - Ishihara, Tatsumi

AU - Sirikanda, Nuansaeng

AU - Nakashima, Kunihiko

AU - Miyoshi, Shogo

AU - Matsumoto, Hiroshige

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Y1 - 2010/1/1

N2 - The mixed conductivity and oxygen permeation properties of Pr-deficient Pr1.9Ni0.71Cu0.24M0.05O 4+δ (M = In,Ga,Al,Ni) were investigated. Among the dopants studied, the Ga-doped membrane was a superior mixed conductor, and it exhibited a high oxygen permeation rate compared with that of the other compositions. Examinations of membranes with different Ga concentrations revealed that the A-site cation-deficient composition, Pr1.9Ni0.71Cu 0.24Ga0.05O4+δ, had the highest permeability of 286 μmol min-1 cm-2 (ca. 7 cm 3 min-1 cm-2) from air to He at 1273 K in a 0.5 mm thick membrane. The oxygen permeation rate of Pr1.9Ni 0.71Cu0.24Ga0.05O4+δ decreased with thickness, indicating that the limiting factor is oxygen diffusivity in bulk. The Seebeck coefficient and oxygen permeation measurements suggest that the Ga dopant and Pr deficiency decreased the charge carrier density and improved the oxide ion conductivity. The estimated oxide ion conductivity in this material is a few times higher than that of the conventional mixed conductors such as Co-based perovskite.

AB - The mixed conductivity and oxygen permeation properties of Pr-deficient Pr1.9Ni0.71Cu0.24M0.05O 4+δ (M = In,Ga,Al,Ni) were investigated. Among the dopants studied, the Ga-doped membrane was a superior mixed conductor, and it exhibited a high oxygen permeation rate compared with that of the other compositions. Examinations of membranes with different Ga concentrations revealed that the A-site cation-deficient composition, Pr1.9Ni0.71Cu 0.24Ga0.05O4+δ, had the highest permeability of 286 μmol min-1 cm-2 (ca. 7 cm 3 min-1 cm-2) from air to He at 1273 K in a 0.5 mm thick membrane. The oxygen permeation rate of Pr1.9Ni 0.71Cu0.24Ga0.05O4+δ decreased with thickness, indicating that the limiting factor is oxygen diffusivity in bulk. The Seebeck coefficient and oxygen permeation measurements suggest that the Ga dopant and Pr deficiency decreased the charge carrier density and improved the oxide ion conductivity. The estimated oxide ion conductivity in this material is a few times higher than that of the conventional mixed conductors such as Co-based perovskite.

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