Performance and ageing of an anode-supported SOFC operated in single-chamber conditions

Anode-supported cells made of conventional materials were tested in single-chamber conditions under various CH4/air gas mixtures. Methane-to-oxygen ratio (RMIX) and nominal temperature between 600 and 800 ◦ C both affect the performance of the cell. At a flow rate of 350 sccm, maximum values of power density (260 mW cm −2 ) and cell voltage (1.05 V) were obtained for RMIX = 2 at 800 ◦ C. However, short term ageing experiments show that the stability of the cells depends on RMIX as well as the flow of current. Scanning electron micrographs (SEM) reveal some important changes in anode microstructure close to the fuel inlet that may be, assign to the volatilization of the nickel contained in the Ni–YSZ cermet. © 2005 Elsevier B.V. All rights reserved.

[1]  S. D. Souza.  Thin-film solid oxide fuel cell with high performance at low-temperature , 1997 .

[2]  V. Korchak,et al.  Dynamic behaviour of Ni-containing catalysts during partial oxidation of methane to synthesis gas , 2004 .

[3]  Kevin Kendall,et al.  The reduction of nickelzirconia cermet anodes and the effects on supported thin electrolytes , 1996 .

[4]  Takao Inoue,et al.  A Solid Oxide Fuel Cell Using an Exothermic Reaction as the Heat Source , 2001 .

[5]  V. Choudhary,et al.  Partial oxidation of methane to CO and H2 over nickel and/or cobalt containing ZrO2, ThO2, UO2, TiO2 and SiO2 catalysts , 1998 .

[6]  I. Stefan,et al.  Single chamber fuel cells: Flow geometry, rate and composition considerations , 2003 .

[7]  Anil V. Virkar,et al.  The role of electrode microstructure on activation and concentration polarizations in solid oxide fuel cells , 2000 .

[8]  Takao Inoue,et al.  Single‐Chamber Solid Oxide Fuel Cells at Intermediate Temperatures with Various Hydrocarbon‐Air Mixtures , 2000 .

[9]  Michel Meunier,et al.  Operating Conditions of a Single-Chamber SOFC , 2004 .

[10]  A. J. Murrell,et al.  Selective oxidation of methane to synthesis gas using transition metal catalysts , 1990, Nature.

[11]  Caine M. Finnerty,et al.  Carbon formation on and deactivation of nickel-based/zirconia anodes in solid oxide fuel cells running on methane , 1998 .

[12]  A. J. Appleby,et al.  Fuel cell electrolytes: evolution, properties and future prospects , 1994 .

[13]  Single-Chamber SOFCs with a Ce0.9Gd0.1 O 1.95 Electrolyte Film for Low-Temperature Operation , 2005 .

[14]  Andrew Murray,et al.  Cell cycle: A snip separates sisters , 1999, Nature.

[15]  L. Schmidt,et al.  Comparison of monolith-supported metals for the direct oxidation of methane to syngas , 1994 .

[16]  Xunli Zhang,et al.  Further Studies on Oscillations over Nickel Wires During the Partial Oxidation of Methane , 2003 .

[17]  M. Meunier,et al.  Evaluation of the Actual Working Temperature of A Single-Chamber SOFC , 2004 .

[18]  Scott A. Barnett,et al.  Operation of anode-supported solid oxide fuel cells on propane–air fuel mixtures , 2004 .

[19]  S. A. Barnett,et al.  A direct-methane fuel cell with a ceria-based anode , 1999, Nature.