Microscopic studies on the secondary phases in LSCF after CR poisoning

Shu Sheng Liu, Katherine Develos-Bagarinao, Riyan Achmad Budiman, Tomohiro Ishiyama, Haruo Kishimoto, Katsuhiko Yamaji, Teruhisa Horita, Harumi Yokokawa

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 16, SOFC 2019
EditorsK. Eguchi, S. C. Singhal
PublisherElectrochemical Society Inc.
Pages1257-1262
Number of pages6
Edition1
ISBN (Electronic)9781607688747, 9781607688747
DOIs
Publication statusPublished - 2019
Event16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019 - Kyoto, Japan
Duration: 2019 Sept 82019 Sept 13

Publication series

NameECS Transactions
Number1
Volume91
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

Conference16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019
Country/TerritoryJapan
CityKyoto
Period19/9/819/9/13

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