Microstructure-property relations of solid oxide fuel cell cathodes and current collectors cathodic polarization and ohmic resistance

K. Sasaki, J. P. Wurth, R. Gschwend, M. Gödickemeier, L. J. Gauckler

研究成果: ジャーナルへの寄稿記事

160 引用 (Scopus)

抄録

Microstructure, cathodic polarization, and ohmic resistance on the cathode side of ZrO2-based solid oxide fuel cells have been studied for the intermediate temperature operation range between 700 and 900°C. Starting powder characteristics, powder calcination temperature, and sintering temperature strongly influence the final microstructure of cathodes. Electrochemical performance depends on these processing parameters as well as on the cathode thickness and the contact spacing of current collectors. A decrease in effective electrode area occurs both on the microscopic level with coarse and inhomogeneous cathode microstructure and on the macroscopic level with a wide contact spacing of the current collectors. The smaller effective electrode area causes inhomogeneous current density distribution and results consequently in higher ohmic losses originating from the electrolyte and higher cathodic polarization. These losses are evaluated using La0.35Sr0.15MnO3 cathodes with different microstructures and on the ZrO2-8 mole percent Y2O3 electrolyte. The influence of current path constrictions on the ohmic and nonohmic losses is demonstrated using Pt current collectors of different geometric spacings.

元の言語英語
ページ(範囲)530-543
ページ数14
ジャーナルJournal of the Electrochemical Society
143
発行部数2
DOI
出版物ステータス出版済み - 2 1996

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Cathodic polarization
Acoustic impedance
Solid oxide fuel cells (SOFC)
Cathodes
Microstructure
Powders
Electrolytes
Electrodes
Calcination
Temperature
Current density
Sintering
Processing

All Science Journal Classification (ASJC) codes

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

これを引用

Microstructure-property relations of solid oxide fuel cell cathodes and current collectors cathodic polarization and ohmic resistance. / Sasaki, K.; Wurth, J. P.; Gschwend, R.; Gödickemeier, M.; Gauckler, L. J.

:: Journal of the Electrochemical Society, 巻 143, 番号 2, 02.1996, p. 530-543.

研究成果: ジャーナルへの寄稿記事

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AU - Gschwend, R.

AU - Gödickemeier, M.

AU - Gauckler, L. J.

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