Effects of anode material and fuel on anodic reaction of solid oxide fuel cells

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2068998· OSTI ID:6768234

Setoguchi, T; Okamoto, K; Eguchi, K; Arai, H ^[1]

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1. Dept. of Materials Science and Technology, Graduate School of Engineering Sciences, Kyushu Univ., 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816 (Japan)

In this paper, anodic properties of solid oxide fuel cells are evaluated for several anode/electrolyte systems. Anodic over-voltage of metal/yttria-stabilized zirconia (YSZ) interface was related with metal-oxygen bonding strength and was the smallest for the Ni anode in the present study. The anodic polarization conductivity of Ni-YSZ cermet/YSZ electrolyte interface strongly depended on oxygen partial pressure P[sub 02], in fuel, but was independent of the kind of fuel (H[sub 2]-H[sub 2]O, CO-CO[sub 2] and CH[sub 4]-H[sub 2]O). The activation of oxygen ion appears to be the rate limiting step in the overall reaction. The overvoltages of Ni/ and Pt/samaria-doped ceria (SDC) were very small as compared with those of Ni/ and Pt/YSZ. The anodic properties were also influenced by the oxide material mixed with Ni as a cermet component.

• OSTI ID: 6768234
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 139:10; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300502 -- Fuel Cells-- Performance & Testing
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
300505 -- Fuel Cells-- Electrochemistry
Mass Transfer & Thermodynamics
36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ACTIVATION ENERGY
ALLOYS
ANODES
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL BONDS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CORROSION
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTROCHEMICAL CORROSION
ELECTRODES
ELECTROLYTES
ENERGY
FUEL CELLS
IONS
KINETICS
MATERIALS TESTING
NICKEL COMPOUNDS
NICKEL OXIDES
OXIDES
OXYGEN COMPOUNDS
OXYGEN IONS
PERFORMANCE TESTING
POLARIZATION
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RARE EARTH COMPOUNDS
REACTION KINETICS
SOLID ELECTROLYTE FUEL CELLS
TESTING
TRANSITION ELEMENT COMPOUNDS
YTTRIUM ADDITIONS
YTTRIUM ALLOYS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES