Characteristics of YCoO3-type perovskite oxide and application as an SOFC cathode
| Autor: | Takaaki Sakai, Atsushi Inoishi, Masatsugu Oishi, Tatsumi Ishihara, Hidehisa Hagiwara, Masako Ogushi, Kohei Hosoi, Shintaro Ida |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Oxide 02 engineering and technology General Chemistry Electrolyte Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Cathode 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Chemical engineering law Electrical resistivity and conductivity Electrode General Materials Science 0210 nano-technology Yttria-stabilized zirconia Perovskite (structure) |
| Zdroj: | Journal of Materials Chemistry A. 9:3584-3588 |
| ISSN: | 2050-7496 2050-7488 |
| Popis: | YCoO3 is discussed as a novel cathode material for solid oxide fuel cells (SOFCs). One of the major issues for SOFC development is the side reactions that occur at the electrode and electrolyte interfaces. Characteristics such as the phase stability, reactivity against YSZ, electrical conductivity, and thermal expansion coefficients (TECs) of YCoO3 were investigated. YCoO3 was produced by the sol–gel method below 975 °C, and the fewest impurities were observed at a Y molar ratio of 0.96 (YCO-096). YCO-096 did not react significantly with the YSZ electrolyte when fired at 975 °C for 1 h. The main charge carrier of YCO-096 was confirmed to be electron–holes, h+, and the maximum conductivity was estimated to be 700 S cm−1 at 900 °C. The TECs of YCO-096 were in the range of 16.5–44.2 × 10−6 °C−1 from room temperature to 900 °C. The YCO-096 cathode was stable in the YSZ electrolyte SOFC. Oxygen defects formed at the surfaces of particle YCO-096 were considered to significantly improve the cathodic performance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|