采用甘氨酸-硝酸盐法(GNP)制备Gd0.8Sr0.2CoO3-δ (GSC)纳米粉体.通过元素化学计量、热力学计算及XRD、SEM、交流阻抗谱等测试手段,研究了甘氨酸与金属离子摩尔比(G/M=1.5、2.0、2.5、3.0、3.5)以及煅烧温度等制备参数对GSC粉料合成反应及电极性能的影响.实验测得凝胶自燃烧时火焰温度在850～1150℃之间,其中G/M=-2.5时火焰温度最高,燃烧最完全,与理想化学计量(Φ=1)的计算结果相一致,由此制得的粉料呈蓬松泡沫状,粒径细小.交流阻抗谱测试结果表明:1100℃煅烧制得的GSC-2.5阴极与Sm0.2Ce0.8O1.9 (SDC)电解质间的界面电阻(ASR)最小,仅0.119 Ω·cm2.Gd0.8Sr0.2CoO3-δ电极电导率在500～800℃测试范围内均大于100 S/cm,满足IT-SOFC阴极材料的要求.
参考文献
| [1] | Zhang G R,Dong X L,Liu Z K,et al.Cobalt-site cerium doped SmxSr1-xCoO3-δoxides as potential cathode materials for solid-oxide fuel cells.Journal of Power Sources,2010,195(11):3386-3393. |
| [2] | Jiang S P.A comparison of 02 reduction reactions on porous (La,Sr)MnO3 and (La,Sr)(Co,Fe)O3 electrodes.Solid State Ionics,2002,146:1-22. |
| [3] | Liu B W,Zhang Y,Zhang L M.Oxygen reduction mechanism at Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode for solid oxide fuel cell.International Journal of Hydrogen Energy,2009,34(2):1008-1014. |
| [4] | Lee K T,Manthiram A.Comparison of Ln0.6Sr0.4CoO3-δ (Ln=La,Pr,Nd,Sm and Gd) cathode materials for intermediate temperature solid oxide fuel cells.Journal of the Electrochemcal Society,2006,153:A794-A798. |
| [5] | Huang S G,Peng C Q,Zong Z.A high-performance Gd0.8Sr0.2CoO3-Ce0.9Gd0.1O1.95 composite cathode for intermediate temperature solid oxide fuel cell.Journal of Power Sources,2008,176(1):102-106. |
| [6] | Chen J,Liang F L,Chi B,et al.Palladium and ceria infiltrated La0.8Sr0.2Co0.5Fe0.5O3-δ cathodes of solid oxide fuel cells.Journal of Power Sources,2009,194(1):275-280. |
| [7] | Chen J,Liang F L,Liu L N,et al.Nano-structured (La,Sr)(Co,Fe)O3+YSZ composite cathodes for intermediate temperature solid oxide fuel cells.Journal of Power Sources,2008,183(2):586-589. |
| [8] | Song S A,Jang S C,Han J,et al.Enhancement of cell performance using a gadolinium strontium cobaltite coated cathode in molten carbonate fuel cells.Journal of Power Sources,2011,196(23):9900-9905. |
| [9] | Wang Ya-Nan,Zhou He-Ping.Preparation and characterization of Gd1-xSrxCoO3-δ and Gd0.8Sr0.2Co1-yFeyO3-δ.Chinese Journal of Inorganic Chemistry,2008,24(10):1558-1563. |
| [10] | Jin Hong-Jian,Wang Huan,Zhang Hua,et al.Synthesis and characterization of GdBaCo2O5+δ cathode material by glycine-nitrate process.Journal of Inorganic Materials,2012,27(7):751-756. |
| [11] | Jadhav L D,Chourashiya M G,Subhedar K M,et al.Synthesis of nanocrystalline Gd doped ceria by combustion technique.Journal of Alloys and Compounds,2009,470(1/2):383-386. |
| [12] | Purohit R D,Sharma B P,Pillai K T,et al.Ultrafine ceria powders via glycine-nitrate combustion.Materials Research Bulletin,2001,36:2711-2721. |
| [13] | Schafer J,Sigmund W,Roy S,et al.Low temperature synthesis of ultrafine Pb(Zr,Ti)O3 powder by sol gel combustion.Journal of Materials Research,1997,12:2518-2521. |
| [14] | Jain S R,Adiga K C,Vemeker V R P.A new approach to thermochemical calculations of condensed fuel-oxidizer mixture.Com-bust andFlame,1981,40(1):71-79. |
| [15] | Shao Z P,Zhou W,Zhu Z H.Advanced synthesis of materials for intermediate-temperature solid oxide fuel cells.Progress in Materials Science,2012,57(4):804-874. |
| [16] | Purohit R D,Sharma B P,Pillai K T,et al.Ultrafine ceria powders via glycine-nitrate combustion.Materials Research Bulletin,2001,36:2711-2721. |
| [17] | John A D.Lange's Handbook of Chemistry.fifteenth ed.London:McGraw-Hill,1999:554-569. |
| [18] | Huang Shou-Guo,Peng Chun-Qiu,Xia Chang-Rong.Fabrication of Gd0.8Sr0.2CoO3-Sm0.2Ce0.8O1.9 cathodes for intermediate temperature solid oxide fuel cell.Journal of Functional Materials,2006,1(37):92-94. |
| [19] | Cullity B D.Elements of X-RAY Diffraction.Massachusetts:Ddison-Wesley Publishing Company,Inc.,1956:110. |
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