A new potential electrolyte Ba11W4O23: Novel structure and electrical conductivity

Jin Su Ha; Eungje Lee; Seung Tae Hong; Han Ill Yoo

doi:10.1016/j.ssi.2008.01.038

A new potential electrolyte Ba₁₁W₄O₂₃: Novel structure and electrical conductivity

Jin Su Ha, Eungje Lee, Seung Tae Hong, Han Ill Yoo

Department of Energy and Science and Engineering

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

10 Scopus citations

Abstract

Ba₁₁W₄O₂₃ (or Ba_1.75(BaW)O_5.75) has a derivative perovskite (ABO₃) structure with vacancies ordered in the A-sublattice, but disordered in the O-sublattice, suggesting the potentiality as an oxide ion electrolyte. Electrical conductivities of Ba₁₁W_{4 - x}Ta_xO_{23 - 0.5x} were characterized as functions of temperature, oxygen activity, water vapor activity, and composition x (= 0.1, 0.5, 1.0, 2.0). It has been found that the compound is indeed an oxide ion conductor, over a wide oxygen activity range, with a moderate ionic conductivity, compared with the conventional electrolyte oxides. The conductivity is little dependent on x, but for x = 1 where an appreciable depression of the conductivity occurs. The oxide also exhibits a proton conductivity at temperature below 800 ^oC.

Original language	English
Pages (from-to)	1066-1070
Number of pages	5
Journal	Solid State Ionics
Volume	179
Issue number	21-26
DOIs	https://doi.org/10.1016/j.ssi.2008.01.038
State	Published - 15 Sep 2008

Keywords

BaWO
Decomposition in CO
Oxide electrolyte
Perovskite derivative
Proton conductivity

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10.1016/j.ssi.2008.01.038

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title = "A new potential electrolyte Ba11W4O23: Novel structure and electrical conductivity",

abstract = "Ba11W4O23 (or Ba1.75(BaW)O5.75) has a derivative perovskite (ABO3) structure with vacancies ordered in the A-sublattice, but disordered in the O-sublattice, suggesting the potentiality as an oxide ion electrolyte. Electrical conductivities of Ba11W4 - xTaxO23 - 0.5x were characterized as functions of temperature, oxygen activity, water vapor activity, and composition x (= 0.1, 0.5, 1.0, 2.0). It has been found that the compound is indeed an oxide ion conductor, over a wide oxygen activity range, with a moderate ionic conductivity, compared with the conventional electrolyte oxides. The conductivity is little dependent on x, but for x = 1 where an appreciable depression of the conductivity occurs. The oxide also exhibits a proton conductivity at temperature below 800 oC.",

keywords = "BaWO, Decomposition in CO, Oxide electrolyte, Perovskite derivative, Proton conductivity",

author = "Ha, {Jin Su} and Eungje Lee and Hong, {Seung Tae} and Yoo, {Han Ill}",

year = "2008",

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doi = "10.1016/j.ssi.2008.01.038",

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TY - JOUR

T1 - A new potential electrolyte Ba11W4O23

T2 - Novel structure and electrical conductivity

AU - Ha, Jin Su

AU - Lee, Eungje

AU - Hong, Seung Tae

AU - Yoo, Han Ill

PY - 2008/9/15

Y1 - 2008/9/15

N2 - Ba11W4O23 (or Ba1.75(BaW)O5.75) has a derivative perovskite (ABO3) structure with vacancies ordered in the A-sublattice, but disordered in the O-sublattice, suggesting the potentiality as an oxide ion electrolyte. Electrical conductivities of Ba11W4 - xTaxO23 - 0.5x were characterized as functions of temperature, oxygen activity, water vapor activity, and composition x (= 0.1, 0.5, 1.0, 2.0). It has been found that the compound is indeed an oxide ion conductor, over a wide oxygen activity range, with a moderate ionic conductivity, compared with the conventional electrolyte oxides. The conductivity is little dependent on x, but for x = 1 where an appreciable depression of the conductivity occurs. The oxide also exhibits a proton conductivity at temperature below 800 oC.

AB - Ba11W4O23 (or Ba1.75(BaW)O5.75) has a derivative perovskite (ABO3) structure with vacancies ordered in the A-sublattice, but disordered in the O-sublattice, suggesting the potentiality as an oxide ion electrolyte. Electrical conductivities of Ba11W4 - xTaxO23 - 0.5x were characterized as functions of temperature, oxygen activity, water vapor activity, and composition x (= 0.1, 0.5, 1.0, 2.0). It has been found that the compound is indeed an oxide ion conductor, over a wide oxygen activity range, with a moderate ionic conductivity, compared with the conventional electrolyte oxides. The conductivity is little dependent on x, but for x = 1 where an appreciable depression of the conductivity occurs. The oxide also exhibits a proton conductivity at temperature below 800 oC.

KW - BaWO

KW - Decomposition in CO

KW - Oxide electrolyte

KW - Perovskite derivative

KW - Proton conductivity

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U2 - 10.1016/j.ssi.2008.01.038

DO - 10.1016/j.ssi.2008.01.038

M3 - Article

AN - SCOPUS:48349111958

SN - 0167-2738

VL - 179

SP - 1066

EP - 1070

JO - Solid State Ionics

JF - Solid State Ionics

IS - 21-26

ER -

A new potential electrolyte Ba₁₁W₄O₂₃: Novel structure and electrical conductivity

Abstract

Keywords

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