Contribution of the internal active three-phase zone of Ni-zirconia cermet anodes on the electrode performance of SOFCs
Abstract
An extension of the effective reaction zone of the Ni-zirconia cermet anode in a solid oxide fuel cell was investigated. The reaction zone, the active three-phase zone (ATZ), of the cermet electrode consists of the zone that is formed on the flat interface between the solid electrolyte and the cermet layer, ATZ{sub 2D}, and another that extends three-dimensionally into the cermet layer, ATZ{sub 3D}, from the cermet/electrolyte interface. Anode performances of four types of cermet electrodes with zirconia powders of different ionic conductivities, but with a very similar microstructure, were compared, and the magnitude ratio of ATZ{sub 3D} and ATZ{sub 2D} was evaluated from the relationships between the performance and the ionic conductivity of zirconia in the cermet. For the anode of Ni-YSZ (yttria-stabilized zirconia, 8 mol % Y{sub 2}O{sub 3}) cermet on partially stabilized zirconia (3 mol % Y{sub 2}O{sub 3}) electrolyte, it was found that the contribution of ATZ{sub 3D} was almost 2.5 times larger than that of ATZ{sub 2D} at 1273 K, H{sub 2}-H{sub 2}O 2.4%.
- Authors:
-
- Gunma Univ., Kiryu, Gunma (Japan). Dept. of Biological and Chemical Engineering
- Publication Date:
- OSTI Identifier:
- 345314
- Resource Type:
- Journal Article
- Journal Name:
- Journal of the Electrochemical Society
- Additional Journal Information:
- Journal Volume: 146; Journal Issue: 4; Other Information: PBD: Apr 1999
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 30 DIRECT ENERGY CONVERSION; 36 MATERIALS SCIENCE; SOLID ELECTROLYTE FUEL CELLS; ANODES; PERFORMANCE; NICKEL ALLOYS; ZIRCONIUM ALLOYS; CERMETS; IONIC CONDUCTIVITY; MICROSTRUCTURE; YTTRIUM OXIDES
Citation Formats
Nakagawa, Nobuyoshi, Nakajima, Katsunori, Sato, Makiko, and Kato, Kunio. Contribution of the internal active three-phase zone of Ni-zirconia cermet anodes on the electrode performance of SOFCs. United States: N. p., 1999.
Web. doi:10.1149/1.1391760.
Nakagawa, Nobuyoshi, Nakajima, Katsunori, Sato, Makiko, & Kato, Kunio. Contribution of the internal active three-phase zone of Ni-zirconia cermet anodes on the electrode performance of SOFCs. United States. https://doi.org/10.1149/1.1391760
Nakagawa, Nobuyoshi, Nakajima, Katsunori, Sato, Makiko, and Kato, Kunio. 1999.
"Contribution of the internal active three-phase zone of Ni-zirconia cermet anodes on the electrode performance of SOFCs". United States. https://doi.org/10.1149/1.1391760.
@article{osti_345314,
title = {Contribution of the internal active three-phase zone of Ni-zirconia cermet anodes on the electrode performance of SOFCs},
author = {Nakagawa, Nobuyoshi and Nakajima, Katsunori and Sato, Makiko and Kato, Kunio},
abstractNote = {An extension of the effective reaction zone of the Ni-zirconia cermet anode in a solid oxide fuel cell was investigated. The reaction zone, the active three-phase zone (ATZ), of the cermet electrode consists of the zone that is formed on the flat interface between the solid electrolyte and the cermet layer, ATZ{sub 2D}, and another that extends three-dimensionally into the cermet layer, ATZ{sub 3D}, from the cermet/electrolyte interface. Anode performances of four types of cermet electrodes with zirconia powders of different ionic conductivities, but with a very similar microstructure, were compared, and the magnitude ratio of ATZ{sub 3D} and ATZ{sub 2D} was evaluated from the relationships between the performance and the ionic conductivity of zirconia in the cermet. For the anode of Ni-YSZ (yttria-stabilized zirconia, 8 mol % Y{sub 2}O{sub 3}) cermet on partially stabilized zirconia (3 mol % Y{sub 2}O{sub 3}) electrolyte, it was found that the contribution of ATZ{sub 3D} was almost 2.5 times larger than that of ATZ{sub 2D} at 1273 K, H{sub 2}-H{sub 2}O 2.4%.},
doi = {10.1149/1.1391760},
url = {https://www.osti.gov/biblio/345314},
journal = {Journal of the Electrochemical Society},
number = 4,
volume = 146,
place = {United States},
year = {Thu Apr 01 00:00:00 EST 1999},
month = {Thu Apr 01 00:00:00 EST 1999}
}