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Title: The chemical stability and conductivity of BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{sigma}} proton-conductive electrolyte for SOFC

Abstract

BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{delta}} and BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{delta}} (x = 0.1, 0.15, 0.2, 0.25, 0.3, 0.35) were prepared by a solid-state reactions. It was found that the BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{delta}} samples decomposed into CeO{sub 2} and BaCO{sub 3} after being exposed in the atmosphere (3% CO{sub 2} + 3% H{sub 2}O + 94% N{sub 2}) at 700 deg. C for 10 h. However, samples containing Nb remains unchanged in the same conditions, demonstrating a better stability in the presence of CO{sub 2} and H{sub 2}O. The conductivity of BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{delta}} increased with the increase of Y content (x {<=} 0.30), and the highest value was observed at x = 0.30 where a significant decrease in conductivity took place at x = 0.35. The conductivity of BaCe{sub 0.6}Y{sub 0.3}Nb{sub 0.1}O{sub 3-{delta}} reaches 0.01 S/cm in humid hydrogen at 700 deg. C, slight lower than BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{delta}}, 0.012 S/cm in the same conditions. Fuel cell with BaCe{sub 0.6}Y{sub 0.3}Nb{sub 0.1}O{sub 3-{delta}} as-prepared was successfully prepared and humidified hydrogen was supplied as fuels in evaluating the fuel cell performance. The open circuit voltage, peak power density and interfacial resistance at 700 deg. C were 1.02more » V, 345 mW/cm{sup 2} and 0.27 {Omega} cm{sup 2}, respectively.« less

Authors:
 [1];  [2];  [3];  [1]
  1. Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China)
  2. Department of Materials Engineering, Taizhou University, Linhai, Zhejiang 317000 (China)
  3. School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST (United Kingdom)
Publication Date:
OSTI Identifier:
22029801
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 44; Journal Issue: 7; Other Information: Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM CARBONATES; CERAMICS; CERIUM OXIDES; SOLIDS; STABILITY; SYNTHESIS; X-RAY DIFFRACTION

Citation Formats

Kui, Xie, Ruiqiang, Yan, Xiaoxiang, Xu, Liu Xingqin, E-mail: xqliu@ustc.edu.cn, and Guangyao, Meng. The chemical stability and conductivity of BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{sigma}} proton-conductive electrolyte for SOFC. United States: N. p., 2009. Web. doi:10.1016/J.MATERRESBULL.2009.02.015.
Kui, Xie, Ruiqiang, Yan, Xiaoxiang, Xu, Liu Xingqin, E-mail: xqliu@ustc.edu.cn, & Guangyao, Meng. The chemical stability and conductivity of BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{sigma}} proton-conductive electrolyte for SOFC. United States. doi:10.1016/J.MATERRESBULL.2009.02.015.
Kui, Xie, Ruiqiang, Yan, Xiaoxiang, Xu, Liu Xingqin, E-mail: xqliu@ustc.edu.cn, and Guangyao, Meng. Wed . "The chemical stability and conductivity of BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{sigma}} proton-conductive electrolyte for SOFC". United States. doi:10.1016/J.MATERRESBULL.2009.02.015.
@article{osti_22029801,
title = {The chemical stability and conductivity of BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{sigma}} proton-conductive electrolyte for SOFC},
author = {Kui, Xie and Ruiqiang, Yan and Xiaoxiang, Xu and Liu Xingqin, E-mail: xqliu@ustc.edu.cn and Guangyao, Meng},
abstractNote = {BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{delta}} and BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{delta}} (x = 0.1, 0.15, 0.2, 0.25, 0.3, 0.35) were prepared by a solid-state reactions. It was found that the BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{delta}} samples decomposed into CeO{sub 2} and BaCO{sub 3} after being exposed in the atmosphere (3% CO{sub 2} + 3% H{sub 2}O + 94% N{sub 2}) at 700 deg. C for 10 h. However, samples containing Nb remains unchanged in the same conditions, demonstrating a better stability in the presence of CO{sub 2} and H{sub 2}O. The conductivity of BaCe{sub 0.9-x}Y{sub x}Nb{sub 0.1}O{sub 3-{delta}} increased with the increase of Y content (x {<=} 0.30), and the highest value was observed at x = 0.30 where a significant decrease in conductivity took place at x = 0.35. The conductivity of BaCe{sub 0.6}Y{sub 0.3}Nb{sub 0.1}O{sub 3-{delta}} reaches 0.01 S/cm in humid hydrogen at 700 deg. C, slight lower than BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{delta}}, 0.012 S/cm in the same conditions. Fuel cell with BaCe{sub 0.6}Y{sub 0.3}Nb{sub 0.1}O{sub 3-{delta}} as-prepared was successfully prepared and humidified hydrogen was supplied as fuels in evaluating the fuel cell performance. The open circuit voltage, peak power density and interfacial resistance at 700 deg. C were 1.02 V, 345 mW/cm{sup 2} and 0.27 {Omega} cm{sup 2}, respectively.},
doi = {10.1016/J.MATERRESBULL.2009.02.015},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 7,
volume = 44,
place = {United States},
year = {2009},
month = {7}
}