| Autor: |
Himeko Orui, Chiba Reiichi, Hajime Arai, Taguchi Hiroaki, Kazuhiko Nozawa, Takeshi Komatsu |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Solid State Ionics. 182:127-132 |
| ISSN: |
0167-2738 |
| DOI: |
10.1016/j.ssi.2010.11.015 |
| Popis: |
We prepared LaNi x Co y Fe 1 − x − y O 3 with 0.2 ≤ x ≤ 0.6 and 0.1 ≤ y ≤ 0.4 (LNCF) powder and investigated its characteristics as a cathode material for solid oxide fuel cells. To investigate the crystal structure of LNCF, we analyzed LNCF powder using X-ray diffraction. The crystal structure of LNCF belongs to a rhombohedral system. High total conductivity above 100 S cm − 1 at 1073 K was obtained for LNCF. When x in this system is 0.6, the total conductivity at 1073 K is more than 500 S cm − 1 . This conductivity is greater than that of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 (LSCF) between 323 and 1323 K. The average coefficient of thermal expansion of LNCF is smaller than that of LSCF. To investigate the chemical stability against Cr 2 O 3 , we heated LNCF-Cr 2 O 3 , LSCF-Cr 2 O 3 and La 0.6 Sr 0.4 CoO 3 (LSC)-Cr 2 O 3 powder mixtures at 1073 K for 0–1000 h. We found that LNCF powder was less reactive with Cr 2 O 3 than LSCF and LSC powder. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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