SYNTHESIS AND ELECTROCHEMICAL BEHAVIOR OF La0.75Sr0.25Cr0.5Mn0.5O3 ANODE ON LaGaO3-BASED SOLID OXIDE FUEL CELLS
As a promising alternative nickel-free anode for the direct utilization of hydrocarbon in solid oxide fuel cells, La0.75Sr0.25Cr0.5Mn0.5O3 (LSCM) was synthesized using glycinenitrate process. The thermogravimetric analysis result indicates that the main phase of LSCM sample begins to form after 835 ℃. The crystalline phases of the sample calcined at various temperatures are characterized by powder X-ray diffraction. At room temperature, LSCM presents a pure hexagonal phase after sintering at 1400 ℃ for 10 h in air. The electrical conductivity of LSCM sample is 28.6 S cm.1 in air and 1.3 S cm.1 in hydrogen at 900 ℃, respectively. Thermal expansion coefficient of LSCM sample is 11.7×10-6 K-1 in the temperature range from 30 to 1000 ℃ in air, which is close to the La0.9Sr0.1Ga0.8Mg0.2O2.85 (LSGM) electrolyte (11.5×10-6 K-1). For the cell with LSCM anode, LSGM electrolyte and La0.6Sr0.4Co0.2Fe0.8O3-Gd0.1Ce0.9O1.95 cathode, the maximum power density is 375 mW cm.2 at 850 ℃, with humidified H2 and ambient air as fuel and oxidant. High cell performance is also achieved for humidified CH4 fuel, the maximum power densities are 101, 219 and 352 mW cm.2 at 750, 800 and 850 ℃, respectively.
YU SHEN TIANMIN HE
State Key Laboratory of Superhard Materials, and College of Physics,Jilin University, 2699 Qianjin S State Key Laboratory of Superhard Materials, and College of Physics, Jilin University, 2699 Qianjin
国际会议
The 12th Asian Conference on Solid State Ionics(第十二届亚洲固态离子学会议暨第十五届中国固态离子学会议)
武汉
英文
806-812
2010-05-02（万方平台首次上网日期，不代表论文的发表时间）