skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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:
; ; ;  [1]
  1. 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}
}