| 溶胶凝胶法制备La_(0.8)Sr_(0.2)FeO_3及其性能表征 |
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| 引用本文： | 江丽娜,黄守国,谢瑜,黄德冰,卢其亮. 溶胶凝胶法制备La_(0.8)Sr_(0.2)FeO_3及其性能表征[J]. 矿冶工程, 2009, 29(6) |
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| 作者姓名： | 江丽娜 黄守国 谢瑜 黄德冰 卢其亮 |
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| 作者单位： | 安徽大学,物理与材料科学学院,安徽,合肥,230039;安徽大学,物理与材料科学学院,安徽,合肥,230039;安徽大学,物理与材料科学学院,安徽,合肥,230039;安徽大学,物理与材料科学学院,安徽,合肥,230039;安徽大学,物理与材料科学学院,安徽,合肥,230039 |
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| 摘 要： | 以溶胶凝胶法合成了La_(0.8)Sr_(0.2)FeO_3(LSF)粉体,用于中温固体氧化物燃料电池阴极材料.分别利用热分析(TG-DTG-DTA)、X射线衍射分析(XRD)、透射电镜(TEM)和交流阻抗谱仪(ACEIS)对粉体和阴极进行表征.结果表明,随着温度升高,经过粉体失水、硝酸盐分解等过程,在600 ℃已基本形成钙钛矿相,1000 ℃时为单一的钙钛矿相,煅烧4 h后的粒径约为80 nm.在800 ℃的阴极界面阻抗为0.12 Ω·cm~2.
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| 关 键 词： | 溶胶凝胶法 中温固体氧化物燃料电池 钙钛矿 La_(0.8)Sr_(0.2)FeO_3 阴极材料 |
Preparation of La_(0.8)Sr_(0.2)FeO_3 by Sol-gel Method and Its Performace Characterization |
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| JIANG Li-na,HUANG Shou-guo,XIE Yu,HUANG De-bing,LU Qi-liang. Preparation of La_(0.8)Sr_(0.2)FeO_3 by Sol-gel Method and Its Performace Characterization[J]. Mining and Metallurgical Engineering, 2009, 29(6) |
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| Authors: | JIANG Li-na HUANG Shou-guo XIE Yu HUANG De-bing LU Qi-liang |
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| Abstract: | La_(0.8)Sr_(0.2)FeO_3 powders were prepared by sol-gel method,which can be used as cathode material of intermediate temperature solid oxide fuel cell. The powders and cathode were characterized by thermogravimetry-differential coefficient thermogravimetry-differential thermal analysis(TG-DTG-DTA), X-ray diffraction(XRD), transmission electron microscopy(TEM) and AC electrochemical impedance spectroscopy(ACEIS) respectively. The results indicated that, with the increase of temperature, the powders lost water and nitrate decomposed. After this process, perovskite phase formed basically at 600 ℃, single perovskite phase formed at 1000 ℃ and the grain size was approximately 80 nm after calcination for 4 h. The interfacial impedance of cathode was 0.12 Ω·cm~2 at 800 ℃. |
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| Keywords: | La_(0.8)Sr_(0.2)FeO_3 sol-gel method intermediate temperature solid oxide fuel cell perovskite La_(0.8)Sr_(0.2)FeO_3 cathode material |
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