کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1276048 | 1497582 | 2011 | 5 صفحه PDF | دانلود رایگان |
Double-proveskite YBa0.5Sr0.5Co2O5+δ (YBSC) was investigated as potential cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs). YBSC material exhibited a good chemical compatibility with the La0.9Sr0.1Ga0.8Mg0.115Co0.085O2.85 (LSGMC) electrolyte up to 950 °C for 2 h. The substitution of Sr for Ba significantly enhanced the electrical conductivity of the YBSC sample compared to undoped YBaCo2O5+δ, and also slightly increased the thermal expansion coefficient. At 325 °C a semiconductor–metal transition was observed and the maximum electrical conductivity of YBSC was 668 S cm−1. The maximum power densities of the electrolyte-supported single cell with YBSC cathode achieved 650 and 468 mW cm−2 at 850 and 800 °C, respectively. Preliminary results suggested that YBSC could be considered as a candidate cathode material for application in IT-SOFCs.
Journal: International Journal of Hydrogen Energy - Volume 36, Issue 11, June 2011, Pages 6894–6898