采用了甘氨酸-硝酸盐法制备了La0.7Sr0.3Cr0.5-yMn0.5-zCo(y+z)O3(y, z=0.1, 0.2)系列阳极材料.借助XRD, SEM对所制备的材料进行了物相和形貌分析.XRD表明利用GNP法制得的粉体在1350 ℃烧结5 h可以形成完整的钙钛矿相;SEM分析可知所得物料颗粒呈球状,尺寸约为1 μm,且没有团聚现象.同时,XRD显示La0.7Sr0.3Cr0.5Mn0.4Co0.1O3和La0.9Sr0.1Ga0.8Mg0.2O3电解质之间具有较好的化学相容性.采用直流四探针法测试了不同组成材料在250~800 ℃温度范围内在空气中的电导率,发现该系列材料在该温度段范围符合小极化子导电机制.另外,利用直流四探针法测试了La0.7Sr0.3Cr0.5Mn0.4Co0.1O3在不同还原气氛下的电导率,在CH4和H2气氛中,La0.7Sr0.3Cr0.5Mn0.4Co0.1O3最大电导率分别达到了4.5和0.42 S·cm-1.
参考文献
[1] | 毛宗强.燃料电池[M].北京:化学工业出版社,2005:275. |
[2] | 彭苏萍,韩敏芳,杨翠柏,王玉倩.固体氧化物燃料电池[J].物理,2004(02):90-94. |
[3] | Philippe Vernoux;Elisabeth Djurado;Michael Guillodo .Catalytic and Electrochemical Properties of Doped Lanthanum Chromites as New Anode Materials for Solid Oxide Fuel Cells[J].Journal of the American Ceramic Society,2001(10):2289-2295. |
[4] | Takeshi Yao;Yoshiharu Uchimoto;Takuya Sugiyama;Yusuke Nagai .Synthesis of(La,Sr)MeO3(Me=Cr,Mn,Fe,Co) solid solutions from aqueous solutions[J].Solid State Ionics,2000,135(1-4):359. |
[5] | Zha SW;Tsang P;Cheng Z;Liu ML .Electrical properties and sulfur tolerance of La0.75Sr0.25Cr1-xMnxO3 under anodic conditions[J].International Journal of Quantum Chemistry,2005(6):1844-1850. |
[6] | 潘金生;仝健民;田民波.材料科学基础[M].北京:清华大学出版社,2005:97. |
[7] | 田顺宝;林祖纕;祝炳和;王本民.无机材料化学[M].北京:科学出版社,1993:156. |
[8] | 李梦龙.化学数据速查手册[M].北京:化学工业出版社,2003:6. |
[9] | Liu Ronghui;Ma Wenhui;Wang Hua;Yang Bin Dai Yongnian .Synthesis of LaGaO3-based electrolyte material and its compatibility with novel electrode materials[J].Journal of Rare Earths,2005,23:214. |
[10] | 刘建,张炳哲,张伟,丁铁柱.(La1-xREx)2/3Sr1/3MnO3(RE=Y,Sm,Eu,Tb;x=0.1~0.5)的晶体结构及磁性质研究[J].中国稀土学报,2004(06):765-768. |
[11] | Plint Steven M;Connor Paul A;Tao Shanwen;Irvine John T S .Electronic transport in the novel SOFC anode material La1-xSrxCr0.5Mn0.5O3±δ[J].Solid State Ionics,2006,177(19-25):2005. |
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