TY - GEN
T1 - Investigation of solid oxide electrolysis cell electrodes for methane synthesis
AU - Fujiwara, N.
AU - Kikuchi, R.
AU - Takagaki, A.
AU - Sugawara, T.
AU - Oyama, S. T.
N1 - Funding Information:
Dr. Geletu Qing is thanked for his help in preparing samples. N.F. acknowledges support from Materials Education Program for the Future Leaders in Research, Industry, and Technology, The University of Tokyo.
Publisher Copyright:
© The Electrochemical Society.
PY - 2017/5/30
Y1 - 2017/5/30
N2 - Methane-synthesis solid oxide electrolysis cell (MS-SOEC) technology has potential to provide efficient renewable energy storage systems. However, there are few studies focusing on MSSOEC electrode materials. In this study, several materials were tested experimentally. As anode materials, La0.6Sr0.4MnO3-δ (LSM), La0.6Sr0.4Co0.2Fe0.8O3-δ-Ce0.8Sm0.2O1.9 composite (LSCF-SDC) and platinum were compared. The cell with LSCF-SDC exhibited lower overpotentials and higher stability than LSM. Platinum showed even better performance than LSCF-SDC. Ni-SDC was used for the cathode, and the cathode outlet gas compositions were analyzed for several operation temperatures and current densities. It was found that catalytic activity for methanation was enhanced under polarized conditions. Effects of ruthenium addition to the cathode were also examined. Impedance analysis combined with gas composition measurements revealed high electrochemical activity of ruthenium, while methane production was suppressed possibly due to methane reforming reactions promoted by ruthenium.
AB - Methane-synthesis solid oxide electrolysis cell (MS-SOEC) technology has potential to provide efficient renewable energy storage systems. However, there are few studies focusing on MSSOEC electrode materials. In this study, several materials were tested experimentally. As anode materials, La0.6Sr0.4MnO3-δ (LSM), La0.6Sr0.4Co0.2Fe0.8O3-δ-Ce0.8Sm0.2O1.9 composite (LSCF-SDC) and platinum were compared. The cell with LSCF-SDC exhibited lower overpotentials and higher stability than LSM. Platinum showed even better performance than LSCF-SDC. Ni-SDC was used for the cathode, and the cathode outlet gas compositions were analyzed for several operation temperatures and current densities. It was found that catalytic activity for methanation was enhanced under polarized conditions. Effects of ruthenium addition to the cathode were also examined. Impedance analysis combined with gas composition measurements revealed high electrochemical activity of ruthenium, while methane production was suppressed possibly due to methane reforming reactions promoted by ruthenium.
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U2 - 10.1149/07801.3247ecst
DO - 10.1149/07801.3247ecst
M3 - Conference contribution
AN - SCOPUS:85028462260
T3 - ECS Transactions
SP - 3247
EP - 3256
BT - ECS Transactions
A2 - Singhal, S. C.
A2 - Kawada, T.
PB - Electrochemical Society Inc.
T2 - 15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017
Y2 - 23 July 2017 through 28 July 2017
ER -
