Structural and electrical properties of Bi3Y0.9W0.1O6.15-La0.8Sr0.2MnO3 (BiYWO-LSM) composites

M. Dudz, W. Wrobel, M. Malys, A. Borowska-Centkowska, I. Abrahams, K. Z. Fung, F. Krok

研究成果: Article

摘要

Electrical conductivity and structural behavior in Bi3Y0.9W0.1O6.15-La0.8Sr0.2MnO3 (BiYWO-LSM) composite cathodes for intermediate temperature solid-oxide fuel cells (IT-SOFCs) have been investigated. The ionically conducting component (BiYWO) was selected as it not only exhibits high oxide ion conductivity at intermediate temperatures, but also shows good long-term stability. The LSM component is a well-known electronic conductor, commonly used for SOFC cathodes and also shows high interfacial polarization effects. Both composite components exhibit similar thermal expansion coefficients. Composites of different molar ratios of components were prepared by sintering the components together at 850 °C. Electrical behavior was studied by a.c. impedance spectroscopy and transference number measurements were used to determine the ionic and electronic contributions to total conductivity. Percolation type behavior was observed for total conductivity and the percolation threshold value was determined to be in the bismuth rich region of the compositional range, due to the significant difference in the grain sizes of the two components. Ionic and electronic components of the total conductivity at, above and below the percolation threshold are discussed. Stability measurements on a composition close to the percolation threshold show some degree of conductivity decay on prolonged annealing at 650 °C, which is partly recoverable on heating to higher temperatures.

原文English
頁(從 - 到)14-19
頁數6
期刊Solid State Ionics
311
DOIs
出版狀態Published - 2017 十一月 15

指紋

Structural properties
Electric properties
electrical properties
Solid oxide fuel cells (SOFC)
composite materials
Composite materials
Cathodes
conductivity
Bismuth
Temperature
Oxides
Thermal expansion
Sintering
thresholds
Spectroscopy
Annealing
Ions
Polarization
Heating
cathodes

All Science Journal Classification (ASJC) codes

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

引用此文

Dudz, M. ; Wrobel, W. ; Malys, M. ; Borowska-Centkowska, A. ; Abrahams, I. ; Fung, K. Z. ; Krok, F. / Structural and electrical properties of Bi3Y0.9W0.1O6.15-La0.8Sr0.2MnO3 (BiYWO-LSM) composites. 於: Solid State Ionics. 2017 ; 卷 311. 頁 14-19.
@article{e1236573123940c2970105f65c686dce,
title = "Structural and electrical properties of Bi3Y0.9W0.1O6.15-La0.8Sr0.2MnO3 (BiYWO-LSM) composites",
abstract = "Electrical conductivity and structural behavior in Bi3Y0.9W0.1O6.15-La0.8Sr0.2MnO3 (BiYWO-LSM) composite cathodes for intermediate temperature solid-oxide fuel cells (IT-SOFCs) have been investigated. The ionically conducting component (BiYWO) was selected as it not only exhibits high oxide ion conductivity at intermediate temperatures, but also shows good long-term stability. The LSM component is a well-known electronic conductor, commonly used for SOFC cathodes and also shows high interfacial polarization effects. Both composite components exhibit similar thermal expansion coefficients. Composites of different molar ratios of components were prepared by sintering the components together at 850 °C. Electrical behavior was studied by a.c. impedance spectroscopy and transference number measurements were used to determine the ionic and electronic contributions to total conductivity. Percolation type behavior was observed for total conductivity and the percolation threshold value was determined to be in the bismuth rich region of the compositional range, due to the significant difference in the grain sizes of the two components. Ionic and electronic components of the total conductivity at, above and below the percolation threshold are discussed. Stability measurements on a composition close to the percolation threshold show some degree of conductivity decay on prolonged annealing at 650 °C, which is partly recoverable on heating to higher temperatures.",
author = "M. Dudz and W. Wrobel and M. Malys and A. Borowska-Centkowska and I. Abrahams and Fung, {K. Z.} and F. Krok",
year = "2017",
month = "11",
day = "15",
doi = "10.1016/j.ssi.2017.09.002",
language = "English",
volume = "311",
pages = "14--19",
journal = "Solid State Ionics",
issn = "0167-2738",
publisher = "Elsevier",

}

Structural and electrical properties of Bi3Y0.9W0.1O6.15-La0.8Sr0.2MnO3 (BiYWO-LSM) composites. / Dudz, M.; Wrobel, W.; Malys, M.; Borowska-Centkowska, A.; Abrahams, I.; Fung, K. Z.; Krok, F.

於: Solid State Ionics, 卷 311, 15.11.2017, p. 14-19.

研究成果: Article

TY - JOUR

T1 - Structural and electrical properties of Bi3Y0.9W0.1O6.15-La0.8Sr0.2MnO3 (BiYWO-LSM) composites

AU - Dudz, M.

AU - Wrobel, W.

AU - Malys, M.

AU - Borowska-Centkowska, A.

AU - Abrahams, I.

AU - Fung, K. Z.

AU - Krok, F.

PY - 2017/11/15

Y1 - 2017/11/15

N2 - Electrical conductivity and structural behavior in Bi3Y0.9W0.1O6.15-La0.8Sr0.2MnO3 (BiYWO-LSM) composite cathodes for intermediate temperature solid-oxide fuel cells (IT-SOFCs) have been investigated. The ionically conducting component (BiYWO) was selected as it not only exhibits high oxide ion conductivity at intermediate temperatures, but also shows good long-term stability. The LSM component is a well-known electronic conductor, commonly used for SOFC cathodes and also shows high interfacial polarization effects. Both composite components exhibit similar thermal expansion coefficients. Composites of different molar ratios of components were prepared by sintering the components together at 850 °C. Electrical behavior was studied by a.c. impedance spectroscopy and transference number measurements were used to determine the ionic and electronic contributions to total conductivity. Percolation type behavior was observed for total conductivity and the percolation threshold value was determined to be in the bismuth rich region of the compositional range, due to the significant difference in the grain sizes of the two components. Ionic and electronic components of the total conductivity at, above and below the percolation threshold are discussed. Stability measurements on a composition close to the percolation threshold show some degree of conductivity decay on prolonged annealing at 650 °C, which is partly recoverable on heating to higher temperatures.

AB - Electrical conductivity and structural behavior in Bi3Y0.9W0.1O6.15-La0.8Sr0.2MnO3 (BiYWO-LSM) composite cathodes for intermediate temperature solid-oxide fuel cells (IT-SOFCs) have been investigated. The ionically conducting component (BiYWO) was selected as it not only exhibits high oxide ion conductivity at intermediate temperatures, but also shows good long-term stability. The LSM component is a well-known electronic conductor, commonly used for SOFC cathodes and also shows high interfacial polarization effects. Both composite components exhibit similar thermal expansion coefficients. Composites of different molar ratios of components were prepared by sintering the components together at 850 °C. Electrical behavior was studied by a.c. impedance spectroscopy and transference number measurements were used to determine the ionic and electronic contributions to total conductivity. Percolation type behavior was observed for total conductivity and the percolation threshold value was determined to be in the bismuth rich region of the compositional range, due to the significant difference in the grain sizes of the two components. Ionic and electronic components of the total conductivity at, above and below the percolation threshold are discussed. Stability measurements on a composition close to the percolation threshold show some degree of conductivity decay on prolonged annealing at 650 °C, which is partly recoverable on heating to higher temperatures.

UR - http://www.scopus.com/inward/record.url?scp=85029375845&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85029375845&partnerID=8YFLogxK

U2 - 10.1016/j.ssi.2017.09.002

DO - 10.1016/j.ssi.2017.09.002

M3 - Article

AN - SCOPUS:85029375845

VL - 311

SP - 14

EP - 19

JO - Solid State Ionics

JF - Solid State Ionics

SN - 0167-2738

ER -