TY - GEN
T1 - Influence of small defects produced in electrolytes during manufacturing processes on operated SOFCs
AU - Onuki, S.
AU - Iguchi, F.
AU - Shimizu, M.
AU - Kawada, T.
AU - Yugami, H.
N1 - Publisher Copyright:
© The Electrochemical Society.
PY - 2015
Y1 - 2015
N2 - The influence of gas leakage through penetrated holes introduced during fabrication was experimentally evaluated using in-situ Raman scattering spectroscopy. Gas chromatography analysis of pressure differences between the anode and the cathode revealed that the gas leakage through the holes was dominated by gas diffusion through the anode, and that the pressure difference did not influence the amount of gas leakage. In-situ measurements in an operated cell with a hole revealed combustion between leaked H2 and air occurred around the hole, the O2 partial pressure at this hole was not sufficiently low to reduce NiO, and the temperature increased by almost 10°C around the hole. In contrast, no influence on stress distributions was observed.
AB - The influence of gas leakage through penetrated holes introduced during fabrication was experimentally evaluated using in-situ Raman scattering spectroscopy. Gas chromatography analysis of pressure differences between the anode and the cathode revealed that the gas leakage through the holes was dominated by gas diffusion through the anode, and that the pressure difference did not influence the amount of gas leakage. In-situ measurements in an operated cell with a hole revealed combustion between leaked H2 and air occurred around the hole, the O2 partial pressure at this hole was not sufficiently low to reduce NiO, and the temperature increased by almost 10°C around the hole. In contrast, no influence on stress distributions was observed.
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U2 - 10.1149/06801.2421ecst
DO - 10.1149/06801.2421ecst
M3 - Conference contribution
AN - SCOPUS:84938809369
T3 - ECS Transactions
SP - 2421
EP - 2428
BT - Solid Oxide Fuel Cells 14, SOFC 2015
A2 - Singhal, S. C.
A2 - Eguchi, K.
PB - Electrochemical Society Inc.
T2 - 14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage
Y2 - 26 July 2015 through 31 July 2015
ER -