TY - GEN
T1 - Contribution of triple-phase boundary reaction in cathodic reaction of solid oxide fuel cell
AU - Fujimaki, Y.
AU - Mizuno, K.
AU - Kimura, Y.
AU - Nakamura, T.
AU - Develos-Bagarinao, K.
AU - Yamaji, K.
AU - Yashiro, K.
AU - Kawada, T.
AU - Iguchi, F.
AU - Yugami, H.
AU - Amezawa, K.
N1 - Funding Information:
This work was supported by the Core Research for Evolutional Science and Technology (CREST) from Japan Science and Technology Agency (JST) and the KAKENHI (Grants-in-Aid for Scientific Research) from The Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.
Publisher Copyright:
© The Electrochemical Society.
PY - 2017/5/30
Y1 - 2017/5/30
N2 - The cathodic reaction of a solid oxide fuel cell (SOFC) was investigated by 18O/16O isotope exchange with/without polarization and isotopic distribution analysis by second ion mass spectroscopy. In order to elucidate the contribution of triple phase boundary (TPB) reaction while eliminating the influence of the electrode microstructure, a patterned thin film electrode was used as a model cathode. La0.6Sr0.4CoO3-δ was chosen as a model material exhibiting mixed ionic and electronic conduction. A slight increase in the 18O ratio was observed within 20 μm from the electrode/electrolyte interface under a constant cathodic polarization of 220 mV at 973 K in 1 bar of P(O2). Such an increase in the 18O ratio was considered to be caused by the electrochemical oxygen incorporation. The contribution of the TPB reaction to the total cathode reaction was not clearly observed at least in applied experimental conditions.
AB - The cathodic reaction of a solid oxide fuel cell (SOFC) was investigated by 18O/16O isotope exchange with/without polarization and isotopic distribution analysis by second ion mass spectroscopy. In order to elucidate the contribution of triple phase boundary (TPB) reaction while eliminating the influence of the electrode microstructure, a patterned thin film electrode was used as a model cathode. La0.6Sr0.4CoO3-δ was chosen as a model material exhibiting mixed ionic and electronic conduction. A slight increase in the 18O ratio was observed within 20 μm from the electrode/electrolyte interface under a constant cathodic polarization of 220 mV at 973 K in 1 bar of P(O2). Such an increase in the 18O ratio was considered to be caused by the electrochemical oxygen incorporation. The contribution of the TPB reaction to the total cathode reaction was not clearly observed at least in applied experimental conditions.
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U2 - 10.1149/07801.0847ecst
DO - 10.1149/07801.0847ecst
M3 - Conference contribution
AN - SCOPUS:85028448932
T3 - ECS Transactions
SP - 847
EP - 853
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 -