High oxide-ion conductivity of monovalent-metal-doped bismuth vanadate at intermediate temperatures

Yu ki Taninouchi; Tetsuya Uda; Tetsu Ichitsubo; Yasuhiro Awakura; Eiichiro Matsubara

doi:10.1016/j.ssi.2010.04.005

High oxide-ion conductivity of monovalent-metal-doped bismuth vanadate at intermediate temperatures

Yu ki Taninouchi, Tetsuya Uda, Tetsu Ichitsubo, Yasuhiro Awakura, Eiichiro Matsubara

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

28 Citations (Scopus)

Abstract

Li- and Ag-doped Bi₂VO_5.5 were synthesized by solid-state reactions, and their high oxide-ion conductivities at intermediate temperatures between 400 and 600 °C were demonstrated. Li- and Ag-doped Bi₂VO_5.5 show a higher symmetry than Bi₂VO_5.5 at room temperature. In Bi₂(V_0.9Li_0.1)O_5.3 and Bi₂(V_0.9Ag_0.1)O_5.3, the tetragonal γ-phase, i.e., the high-temperature and disordered phase of Bi₂VO_5.5, is stabilized at room temperature. AC impedance spectroscopy reveals that Li- and Ag-doping markedly improve the electrical conductivity of Bi₂VO_5.5 below 570 °C. The dominant charge carrier is confirmed as oxide ions from impedance spectra, DC polarization measurements, and conductivity change with oxygen partial pressure. At around 500 °C, the oxide-ion conductivities of Li- and Ag-doped Bi₂VO_5.5 are 2-5 times higher than that of La_0.8Sr_0.2Ga_0.8Mg_0.115Co_0.085O₃, which is one of the best oxide-ion conductors.

Original language	English
Pages (from-to)	719-723
Number of pages	5
Journal	Solid State Ionics
Volume	181
Issue number	15-16
DOIs	https://doi.org/10.1016/j.ssi.2010.04.005
Publication status	Published - 2010 Jun 3
Externally published	Yes

Keywords

BIMEVOX
BiVO
Doping
Electrical conductivity
Oxide-ion conductor

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1016/j.ssi.2010.04.005

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title = "High oxide-ion conductivity of monovalent-metal-doped bismuth vanadate at intermediate temperatures",

abstract = "Li- and Ag-doped Bi2VO5.5 were synthesized by solid-state reactions, and their high oxide-ion conductivities at intermediate temperatures between 400 and 600 °C were demonstrated. Li- and Ag-doped Bi2VO5.5 show a higher symmetry than Bi2VO5.5 at room temperature. In Bi2(V0.9Li0.1)O5.3 and Bi2(V0.9Ag0.1)O5.3, the tetragonal γ-phase, i.e., the high-temperature and disordered phase of Bi2VO5.5, is stabilized at room temperature. AC impedance spectroscopy reveals that Li- and Ag-doping markedly improve the electrical conductivity of Bi2VO5.5 below 570 °C. The dominant charge carrier is confirmed as oxide ions from impedance spectra, DC polarization measurements, and conductivity change with oxygen partial pressure. At around 500 °C, the oxide-ion conductivities of Li- and Ag-doped Bi2VO5.5 are 2-5 times higher than that of La0.8Sr0.2Ga0.8Mg0.115Co0.085O3, which is one of the best oxide-ion conductors.",

keywords = "BIMEVOX, BiVO, Doping, Electrical conductivity, Oxide-ion conductor",

author = "Taninouchi, {Yu ki} and Tetsuya Uda and Tetsu Ichitsubo and Yasuhiro Awakura and Eiichiro Matsubara",

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doi = "10.1016/j.ssi.2010.04.005",

language = "English",

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AU - Taninouchi, Yu ki

AU - Uda, Tetsuya

AU - Ichitsubo, Tetsu

AU - Awakura, Yasuhiro

AU - Matsubara, Eiichiro

PY - 2010/6/3

Y1 - 2010/6/3

N2 - Li- and Ag-doped Bi2VO5.5 were synthesized by solid-state reactions, and their high oxide-ion conductivities at intermediate temperatures between 400 and 600 °C were demonstrated. Li- and Ag-doped Bi2VO5.5 show a higher symmetry than Bi2VO5.5 at room temperature. In Bi2(V0.9Li0.1)O5.3 and Bi2(V0.9Ag0.1)O5.3, the tetragonal γ-phase, i.e., the high-temperature and disordered phase of Bi2VO5.5, is stabilized at room temperature. AC impedance spectroscopy reveals that Li- and Ag-doping markedly improve the electrical conductivity of Bi2VO5.5 below 570 °C. The dominant charge carrier is confirmed as oxide ions from impedance spectra, DC polarization measurements, and conductivity change with oxygen partial pressure. At around 500 °C, the oxide-ion conductivities of Li- and Ag-doped Bi2VO5.5 are 2-5 times higher than that of La0.8Sr0.2Ga0.8Mg0.115Co0.085O3, which is one of the best oxide-ion conductors.

AB - Li- and Ag-doped Bi2VO5.5 were synthesized by solid-state reactions, and their high oxide-ion conductivities at intermediate temperatures between 400 and 600 °C were demonstrated. Li- and Ag-doped Bi2VO5.5 show a higher symmetry than Bi2VO5.5 at room temperature. In Bi2(V0.9Li0.1)O5.3 and Bi2(V0.9Ag0.1)O5.3, the tetragonal γ-phase, i.e., the high-temperature and disordered phase of Bi2VO5.5, is stabilized at room temperature. AC impedance spectroscopy reveals that Li- and Ag-doping markedly improve the electrical conductivity of Bi2VO5.5 below 570 °C. The dominant charge carrier is confirmed as oxide ions from impedance spectra, DC polarization measurements, and conductivity change with oxygen partial pressure. At around 500 °C, the oxide-ion conductivities of Li- and Ag-doped Bi2VO5.5 are 2-5 times higher than that of La0.8Sr0.2Ga0.8Mg0.115Co0.085O3, which is one of the best oxide-ion conductors.

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KW - Doping

KW - Electrical conductivity

KW - Oxide-ion conductor

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High oxide-ion conductivity of monovalent-metal-doped bismuth vanadate at intermediate temperatures

Abstract

Keywords

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