通过甘氨酸-硝酸盐法制备出均质纳米粉体La_(0.6)Sr_(0.4)CoO_(3-δ)(LSC),并采用TGA、XRD、BET和SEM等手段进行了表征;同时研究了600~800℃以LSC为阴极材料的单电池的输出性能.结果表明,产物在800℃时已形成钙钛矿相,且具有较高的比表面积,950℃为最佳烧结温度,可获得纳米级多孔显微结构,所得单电池输出性能显著提高;当电压为0.7V时,电池功率密度增幅随温度增加非常明显.
The uniform nanopowders of La_(0.6)Sr_(0.4)CoO_(3-δ)(LSC) were synthesized by glycine-nitrate process and the powders obtained were characterized by TGA, XRD, BET and SEM. Meanwhile, the single cell performance of SOFC based on LSC as cathode was tested from 600 to 800℃. The results showed that perovskite phase could form after heat treatment of the cathode at 800℃ for 2h, and the powders acquired exhibited high specific surface area. Moreover, uniform and porous structure of cathode layers can be obtained by sintering at 950℃ and the single cell with LSC exhibits good electrochemical performance. Furthermore, I-V-P curve analysis revealed that the power density increased obviously with temperature at cell voltage of 0.7V.
参考文献
[1] | 张小林,盛建军,李双保,林峰.钙钛矿型中低温固体氧化物燃料电池阴极材料研究进展[J].广东化工,2008(11):39-41,68. |
[2] | 吕振刚,郭瑞松.钙钛矿型中温固体氧化物燃料电池阴极材料[J].中国陶瓷,2004(02):18-20,3. |
[3] | Jai-Woh Kim;Anil V. Virkar;Kuan-Zong Fung;Karun Mehta;Subhash C. Singhal .Polarization effects in intermediate temperature, anode-supported solid oxide fuel cells[J].Journal of the Electrochemical Society,1999(1):69-78. |
[4] | 毛宗强.燃料电池[M].北京:化学工业出版社,2005:275-304. |
[5] | Y.L.Yang;C.L.Chen .Impedance Studies of Oxygen Exchange on Dense Thin Film Electrodes of La_(0.5)Sr_(0.5)CoO_(3-#delta#)[J].Journal of the Electrochemical Society,2000(11):4001-4007. |
[6] | Srdic VV;Omorjan RP;Seydel J .Electrochemical performances of (La,Sr)CoO3 cathode for zirconia-based solid oxide fuel cells[J].Materials Science & Engineering, B. Solid-State Materials for Advanced Technology,2005(2):119-124. |
[7] | 李远强;邱泰;何旭初 等.[J].电子元件与材料,1995,14(06):48. |
[8] | 韩敏芳,李伯涛,彭苏萍,杨翠柏,刘敬.固相反应合成的机理La1-xSrxMnO3[J].北京科技大学学报,2002(06):619-622. |
[9] | van Doom R H E .[J].Air Products & Chemicals Inc,1997,18(05):6-13. |
[10] | 李彦,余春江,骆仲泱,许祝安,岑可法.复合掺杂氧化物La0.5Sr0.5CoO2.91的性能和稳定性[J].中国稀土学报,2006(04):442-446. |
[11] | Larry A.Chick;Jun Liu;Feffry W.Stevenson .Phase transitions and transient liquid-phase sintering in calcium-substituted lanthanum chromite[J].Journal of the American Ceramic Society,1997(8):2109-2120. |
[12] | Chou YS.;Armstrong TR.;Pederson LR.;Stevenson JW. .Mechanical properties of La1-xSrxCo0.2Fe0.8O3 mixed-conducting perovskites made by the combustion synthesis technique[J].Journal of the American Ceramic Society,2000(6):1457-1464. |
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