TY - JOUR
T1 - Structural, chemical, and electrochemical characteristics of LaSr 2Fe 2CrO 9-δ-based solid oxide fuel cell anodes
AU - Haag, Jacob M.
AU - Bierschenk, David M.
AU - Barnett, Scott A.
AU - Poeppelmeier, Kenneth R.
N1 - Funding Information:
The authors gratefully acknowledge the financial support of the Department of Energy (Award No. DE-FG02-05ER46255 ) and National Science Foundation grant CBET-0854223 .
Funding Information:
The use of the Central Facilities was supported by the MRSEC program of the National Science Foundation (DMR-0576097) at the Materials Research Center of Northwestern University. The authors would also like to thank Dr. Brian Toby and the 11-BM staff for their assistance with the high resolution X-ray powder diffraction. Use of the Advanced Photon Source at Argonne National Laboratory was supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
PY - 2012/3/29
Y1 - 2012/3/29
N2 - Solid oxide fuel cells with LaSr 2Fe 2CrO 9-δ-Gd 0.1Ce 0.9O 2-δ composite anodes were tested in H 2, H 2S-contaminated H 2, and CH 4 fuels as well as under redox cycling conditions. The La 0.9Sr 0.1Ga 0.8Mg 0.2O 3-δ electrolyte supported cells had La 0.4Ce 0.6O 2-δ barrier layers to prevent cation diffusion between LaSr 2Fe 2CrO 9-δ and La 0.9Sr 0.1Ga 0.8Mg 0.2O 3-δ. After an initial break-in where the performance improved slightly, the cells were stable in humidified H 2 with a power density > 0.4 W cm - 2 and an anode polarization resistance as low as 0.22 Ω cm 2. Anode polarization resistance showed little or no change after 15 redox cycles at 800 °C. Cell performance was stable with 22 ppm H 2S, with only a slight performance decrease relative to pure H 2, but higher H 2S concentrations caused continuous degradation. Also, the performance in humidified CH 4 fuel was quite low.
AB - Solid oxide fuel cells with LaSr 2Fe 2CrO 9-δ-Gd 0.1Ce 0.9O 2-δ composite anodes were tested in H 2, H 2S-contaminated H 2, and CH 4 fuels as well as under redox cycling conditions. The La 0.9Sr 0.1Ga 0.8Mg 0.2O 3-δ electrolyte supported cells had La 0.4Ce 0.6O 2-δ barrier layers to prevent cation diffusion between LaSr 2Fe 2CrO 9-δ and La 0.9Sr 0.1Ga 0.8Mg 0.2O 3-δ. After an initial break-in where the performance improved slightly, the cells were stable in humidified H 2 with a power density > 0.4 W cm - 2 and an anode polarization resistance as low as 0.22 Ω cm 2. Anode polarization resistance showed little or no change after 15 redox cycles at 800 °C. Cell performance was stable with 22 ppm H 2S, with only a slight performance decrease relative to pure H 2, but higher H 2S concentrations caused continuous degradation. Also, the performance in humidified CH 4 fuel was quite low.
KW - Oxide anode
KW - Perovskite
KW - Redox
KW - Solid oxide fuel cell
KW - Sulfur tolerance
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U2 - 10.1016/j.ssi.2012.01.037
DO - 10.1016/j.ssi.2012.01.037
M3 - Article
AN - SCOPUS:84857662179
VL - 212
SP - 1
EP - 5
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
ER -