化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (11) : 188-192.

科学研究

固体氧化物燃料电池阴极材料La_0.7Sr_0.3Fe_xCo_1-xMe_0.1O_3-δ的制备与性能

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Synthesis and property of La_0.7Sr_0.3Fe_xCo_1-xMe_0.1O_3-δ cathode for solid oxide fuel cell by sol-gel

Wu Yanan¹, Li Songbo¹, An Shengli², Li Xiangguo¹

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Received		Published
2017-06-26		2018-11-20
Issue Date	Revised Date
2018-12-04	2017-06-26

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摘要

采用溶胶-凝胶法制备La_0.7Sr_0.3Fe_xCo_1-xMe_0.1O_3-δ(x=0.8、0.7,Me=Cu、Ni、Mn)系列阴极材料,通过热重-差热分析(TG-DTA)、X射线衍射(XRD)、扫描电镜(SEM)、直流四探针法对材料的结构与性能进行研究。XRD研究结果表明,不同成分的干凝胶在1000℃煅烧时,全部形成钙钛矿相,并且不同成分的阴极材料与电解质SDC在煅烧的过程中未发生反应,具有良好的化学稳定性。采用直流四电极法测试了阴极材料La_0.7Sr_0.3Fe_xCo_1-xMe_0.1O_3-δ系列的电导率,结果表明,在测试温度400～800℃条件下,阴极材料La_0.7Sr_0.3Fe_xCo_1-xMe_0.1O_3-δ系列具有较高的电导率,其中La_0.7Sr_0.3Fe_0.7Co_0.2Cu_0.1O_3-δ样品具有最高的电导率,在800℃时电导率达到了691.71S/cm。

Abstract

The series of La_0.7Sr_0.3Fe_xCo_1-xMe_0.1O_3-δ(X=0.8,0.7;Me=Cu,Ni,Mn) cathode materials were prepared by sol-gel method.The structure and properties of material were measured by thermogravimetry-differential thermal analysis (TG-DTA),X-ray diffractometry (XRD),scanning electron microscopy (SEM) and four-probe DC method.The results of XRD showed that the perovskite phase was formed when the xerogels of different compositions were calcined at 1000℃,and the cathodic materials of different compositions did not react with the electrolyte SDC during the calcined process and had good chemical compatibility.The conductivity of material was tested by direct current four-probe method.The results indicated that sample had the highest conductivity in the temperature of 400～800℃,and the conductivity reached 691.71S/cm at 800℃.

关键词

阴极材料 / 溶胶-凝胶法 / 电导率 / 钙钛矿

Key words

cathode material / sol-gel method / conductivity / perovskite

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固体氧化物燃料电池阴极材料La_0.7Sr_0.3Fe_xCo_1-xMe_0.1O_3-δ的制备与性能[J]. 化工新型材料, 2018, 46(11): 188-192 DOI:

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参考文献

原文顺序 | 出版日期 | 本文引用

[1] Minh N Q.Ceramic fuel cells[J].J Am Ceram Soc,1993,76(3):563-588.
[2] Larminie J,Dicks A.Fuel cell systems explained[M].England:Wiley,2013.
[3] Jiang S P,Zhang L,Zhang Y J.Lanthanum strontium manganese chromite cathode and anode synthesized by gelcasting for solid oxide fuel cells[J].J Mater Chem,2007,17(25):2627-2635.
[4] Dai H L,Chen H,He S C.Improving solid oxide fuel cell performance by a single-step co-firing process[J].J Power Sources,2015,286:427-430.
[5] Molenda J,Šwierczek K,Zajac W.Functional materials for the IT-SOFC[J].Journal of Power Sources,2007,173(2):657-670.
[6] Brett D J L,Atkinson A,Cumming D,et al.Methanol as a direct fuel in intermediate temperature (500～600℃) solid oxide fuel cells with copper based anodes[J].Chemical Engineering Science,2005,60(21):5649-5662.
[7] Ivers-Tiffee E,Weber A,Herbstritt D.Modelling and DC-polarisation of a three dimensional electrode/electrolyte interface[J].J Eur Ceram Soc,2001,21(10/11):1805-1811.
[8] Royer S,Duprez D,Kaliaguine S.Oxygen mobility in LaCoO₃ perovskites[J].Catalysis Today,2006,112(1/4):99-102.
[9] Wang Sea-Fue,Yeh Chun-Ting,Wang Yuh-Ruey,et al.Effects of (LaSr)(CoFeCu)O_3-δ cathodes on the characteristics of intermediate temperature solid oxide fuel cells[J].Journal of Power Sources,2012,201:18-25.
[10] Ma Zhaohui,Sun Chunwen,Ma Chao,et al.Ni doped La_0.6Sr_0.4FeO_3-δ symmetrical electrode for solid oxide fuel cells[J].Science Direct,2016,37(8):1347-1353.
[11] 李松波,杨燕茹,张英杰,等.SOFC阴极材料La_0.7Sr_0.3Cu_xCo_yMn_(1-x-y)O₃的制备和性能研究[J].稀有金属材料与工程,2013(s2):487-490.
[12] 靳宏建,王欢,张华,等.甘氨酸-硝酸盐法合成GdBaCo₂O_5+δ阴极材料及其性能[J].无机材料学报,2012,27(7):751-756.
[13] 胡智,黄晓巍,陈杨辉.EDTA-甘氨酸法制备SmBaCo₂O_5+δ阴极材料及其性能[J].物理化学学报,2013,29(12):2585-2591.
[14] 罗凌虹,黄祖志,邵由俊,等.静电纺丝法制备中温固体氧化物燃料电池阴极用纳米La_0.6Sr_0.4Co_0.4Fe_0.6O₃纤维[J].硅酸盐学报,2013,41(8):1031-1036.
[15] Qin Guoheng,Huang Xiaowei,Chen Jing,et al.Synthesis of Sr and Mg double-doped LaAlO₃ nanopowders via EDTA-glycine combined process[J].Powder Technology,2013,235(2):880-885.