TY - GEN
T1 - Microscopic studies on the secondary phases in LSCF after CR poisoning
AU - Liu, Shu Sheng
AU - Develos-Bagarinao, Katherine
AU - Budiman, Riyan Achmad
AU - Ishiyama, Tomohiro
AU - Kishimoto, Haruo
AU - Yamaji, Katsuhiko
AU - Horita, Teruhisa
AU - Yokokawa, Harumi
N1 - Funding Information:
This study was supported by the Development Organization (NEDO) as a evaluation method of SOFC durability”.
Funding Information:
This study was supported by the New Energy and Industrial Technology Development Organization (NEDO) as a research project on ?Basic study on rapid evaluation method of SOFC durability?.
Publisher Copyright:
© The Electrochemical Society.
PY - 2019
Y1 - 2019
N2 - Chromium poisoning is one of the critical issues leading to the degradation of LSCF. In this work, the poisoning experiment is carried out for 100 h with a low concentration of Cr source at a temperature of 700 °C. We focus on the detection of the secondary phases after poisoning using high-resolution electron microscopy techniques. Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) results indicate that there seem to be Cr/Sr-rich particles formation on the surfaces of grains. Scanning transmission electron microscopy-EDS analysis confirms that such particles are SrCrO4. They form on the cathode surface and the entire cathode layer and are found mainly at the grain boundaries of LSCF open to the gas phase. The related instability of LSCF before and after poisoning is also discussed.
AB - Chromium poisoning is one of the critical issues leading to the degradation of LSCF. In this work, the poisoning experiment is carried out for 100 h with a low concentration of Cr source at a temperature of 700 °C. We focus on the detection of the secondary phases after poisoning using high-resolution electron microscopy techniques. Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) results indicate that there seem to be Cr/Sr-rich particles formation on the surfaces of grains. Scanning transmission electron microscopy-EDS analysis confirms that such particles are SrCrO4. They form on the cathode surface and the entire cathode layer and are found mainly at the grain boundaries of LSCF open to the gas phase. The related instability of LSCF before and after poisoning is also discussed.
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U2 - 10.1149/09101.1257ecst
DO - 10.1149/09101.1257ecst
M3 - Conference contribution
AN - SCOPUS:85073253419
T3 - ECS Transactions
SP - 1257
EP - 1262
BT - Solid Oxide Fuel Cells 16, SOFC 2019
A2 - Eguchi, K.
A2 - Singhal, S. C.
PB - Electrochemical Society Inc.
T2 - 16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019
Y2 - 8 September 2019 through 13 September 2019
ER -