TY - GEN
T1 - Triple phase boundary reaction in a mixed-conducting SOFC cathode
AU - Amezawa, K.
AU - Fujimaki, Y.
AU - Mizuno, K.
AU - Kimura, Y.
AU - Nakamura, T.
AU - Nitta, K.
AU - Terada, Y.
AU - Iguchi, F.
AU - Yashiro, K.
AU - Yugami, H.
AU - Kawada, T.
N1 - Funding Information:
A part of this work was carried out under financial supports from CREST from the Japan Science and Technology Agency (JST) and Grant-in-Aid for Scientific Research of MEXT, Japan.
Publisher Copyright:
© The Electrochemical Society.
PY - 2017
Y1 - 2017
N2 - The contribution of the triple phase boundary reaction in a mixed ionic and electronic conducting (MIEC) cathode in solid oxide fuel cells (SOFCs) was investigated. For this purpose, patterned thin film electrodes with or without triple phase boundaries, which simplified the microstructure of a practical porous electrode, were proposed and fabricated. In this work, an La0.6Sr0.4CoO3-δ (LSC) electrode on a Ce0.9Gd0.1O1.95 electrolte was chosen as a model SOFC MIEC cathode. Effective reaction area was evaluated by means of operando micro X-ray absorption spectroscopy with the model electrodes under 10"2 bar of p(O2) at 873 K. It was found that the introduction of triple phase boundaries shortened the effective reaction area. The results may indicate the non-negligible contribution of the triple phase boundary reaction even in SOFC MIEC cathodes.
AB - The contribution of the triple phase boundary reaction in a mixed ionic and electronic conducting (MIEC) cathode in solid oxide fuel cells (SOFCs) was investigated. For this purpose, patterned thin film electrodes with or without triple phase boundaries, which simplified the microstructure of a practical porous electrode, were proposed and fabricated. In this work, an La0.6Sr0.4CoO3-δ (LSC) electrode on a Ce0.9Gd0.1O1.95 electrolte was chosen as a model SOFC MIEC cathode. Effective reaction area was evaluated by means of operando micro X-ray absorption spectroscopy with the model electrodes under 10"2 bar of p(O2) at 873 K. It was found that the introduction of triple phase boundaries shortened the effective reaction area. The results may indicate the non-negligible contribution of the triple phase boundary reaction even in SOFC MIEC cathodes.
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U2 - 10.1149/07710.0041ecst
DO - 10.1149/07710.0041ecst
M3 - Conference contribution
AN - SCOPUS:85022093778
T3 - ECS Transactions
SP - 41
EP - 47
BT - Solid-Gas Electrochemical Interfaces 2 - SGEI 2
A2 - Yildiz, B.
A2 - Adler, S.
A2 - Ivers-Tiffee, E.
A2 - Kawada, T.
PB - Electrochemical Society Inc.
T2 - Symposium on Solid-Gas Electrochemical Interfaces 2, SGEI 2017 - 231st ECS Meeting 2017
Y2 - 28 May 2017 through 1 June 2017
ER -