采用甘氨酸-硝酸盐法(GNP法)一次性合成固体氧化物燃料电池复合阳极材料Ce_(0.8)Ca_(0.2)O_2-La_(0.7)Sr_(0.3)Cr_(0.5)Mn_(0.5-x)Co_xO_(3-δ) (CDC-LSCMCo).XRD、SEM和EDS分析结果表明:1350 ℃下烧结5 h能够得到单一萤石-钙钛矿结构且粒度较小(1 μm左右)的复合阳极粉体.电导率的测试研究发现,温度大于750 ℃时,电导率随Co含量的增加而增大.800 ℃时,CDC-LSCMCo_(0.15)分别在空气与氢气气氛下的电导率分别为10.5和0.7 S·cm~(-1).SEM和XRD分析表明:CDC-LSCMCo与La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3-δ)电解质材料有很好的热与化学相容性,是一种应用前景良好的IT-SOFC阳极材料.
IT-SOFC composite anode material Ce_(0.8)Ca_(0.2)O_2-La_(0.7)Sr_(0.3)Cr_(0.5)Mn_(0.5-x)CoxO_(3-δ) (CDC-LSCMCo) was synthesized in one-step by glycine nitrate process (GNP). The results from X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) indicate that the composite anode powder with single fluorite-perovskite phase and small grain size (about 1 μm) was obtained after sintering the predecessor at 1350 ℃ for 5 h. Conductivity testing show that the conductivity of CDC-LSCMCo increases with the Co content increasing when the temperature is above 750 ℃; while at 800 ℃ the conductivity is 10.5 S·cm~(-1) and 0.7 S·cm~(-1) in air and H2 atmosphere, respectively. Good chemical-thermal compatibility between CDC-LSCMCo and La_(0.9)Sr_(0.1)Ga_(0.8)Mg(0.2)O_(3-δ) (LSGM) was confirmed via XRD and SEM. CDC-LSCMCo is a promising anode material of SOFC for its excellent properties at intermediate temperature.
参考文献
| [1] | Atkinson A;Barnett S;Gorte R et al.[J].Nature Materials,2004,3:17. |
| [2] | Matsuzaki Y.;Yasuda I. .The poisoning effect of sulfur-containing impurity gas on a SOFC anode: Part I. Dependence on temperature, time, and impurity concentration[J].Solid state ionics,2000(3/4):261-269. |
| [3] | Ishihara T.;Nishiguchi H.;Takita Y.;Shibayama T. .Oxide ion conductivity in La0.8Sr0.2Ga0.8Mg0.2-XNiXO3 perovskite oxide and application for the electrolyte of solid oxide fuel cells[J].Journal of Materials Science,2001(5):1125-1131. |
| [4] | Kim KN;Kim BK;Son JW;Kim J;Lee HW;Lee JH;Moon J .Characterization of the electrode and electrolyte interfaces of LSGM-based SOFCs[J].Solid state ionics,2006(19/25):2155-2158. |
| [5] | Kim H;Lu C;Worrell W L et al.[J].Journal of the Electrochemical Society,2002,149(03):A247. |
| [6] | Lu C.;Worrell WL.;Wang C.;Park S.;Kim H.;Vohs JM.;Gorte RJ. .Development of solid oxide fuel cells for the direct oxidation of hydrocarbon fuels[J].Solid state ionics,2002(Pt.A):393-397. |
| [7] | Lu C;Worrell W L;Gorte R J et al.[J].Journal of the Electrochemical Society,2003,150(03):A354. |
| [8] | Seungdoo Park;Radu Craciun;John M. Vohs;Raymond J. Gorte .Direct oxidation of hydrocarbons in a solid oxide fuel cell I. methane oxidation[J].Journal of the Electrochemical Society,1999(10):3603-3605. |
| [9] | Gorte RJ.;Vohs JM.;Wang CH.;Park S. .Anodes for direct oxidation of dry hydrocarbons in a solid-oxide fuel cell[J].Advanced Materials,2000(19):1465-1469. |
| [10] | Joseph Sfeir;Philippe A. Buffat;Pedro Mockli .Lanthanum Chromite Based Catalysts for Oxidation of Methane Directly on SOFC Anodes[J].Journal of Catalysis,2001(2):229-244. |
| [11] | Sauvet AL;Irvine JTS .Catalytic activity for steam methane reforming and physical characterisation of La1-xSrxCr1-yNiyO3-delta[J].Solid state ionics,2004(1/2):1-8. |
| [12] | Jiang S P;Chen X J;Chan S H et al.[J].Journal of the Electrochemical Society,2006,153(05):A850. |
| [13] | Tao S;Irvine J T S .[J].Journal of the Electrochemical Society,2004,151(02):A252. |
| [14] | Stevenson JW.;Mccready DE.;Pederson IR.;Weber WJ.;Armstrong TR. .PROCESSING AND ELECTRICAL PROPERTIES OF ALKALINE EARTH-DOPED LANTHANUM GALLATE[J].Journal of the Electrochemical Society,1997(10):3613-3620. |
| [15] | Ishihara T;Honda M;Shibayama T et al.[J].Journal of the Electrochemical Society,1998,145(09):3177. |
| [16] | Kharton VV;Tsipis EV;Marozau IP;Viskup AP;Frade JR;Irvine JTS .Mixed conductivity and electrochemical behavior of (La0.75Sr0.25)(0.95)Cr0.5Mn0.5O3-delta[J].Solid state ionics,2007(1/2):101-113. |
| [17] | Steele BCH. .INTERFACIAL REACTIONS ASSOCIATED WITH CERAMIC ION TRANSPORT MEMBRANES[J].Solid state ionics,1995(0):157-165. |
| [18] | Ma Xueju;Chen Xiuhua;Ma Wenhui et al.[J].Journal of Rare Earths,2007,25(S):391. |
| [19] | Zhu WZ.;Deevi SC. .Development of interconnect materials for solid oxide fuel cells [Review][J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):227-243. |
| [20] | Chick L A;Pederson L R;Maupin G D et al.[J].Materials Letters,1990,10(1-2):6. |
| [21] | Tai LW.;Anderson HU.;Sparlin DM.;Sehlin SR.;Nasrallah MM. .STRUCTURE AND ELECTRICAL PROPERTIES OF LA1-XSRXCO1-YFEYO3 .1. THE SYSTEM LA0.8SR0.2CO1-YFEYO3[J].Solid state ionics,1995(3/4):259-271. |
| [22] | He Enquan;Ma Wenhui;Yu Jie et al.[J].Journal of Rare Earths,2007,25(S):382. |
| [23] | Xinge Zhang;Mark Robertson;Cyrille Deces-Petit;Yongsong Xie;Rob Hui;Wei Qu;Olivera Kesler;Radenka Maric;Dave Ghosh .Solid oxide fuel cells with bi-layered electrolyte structure[J].Journal of Power Sources,2008(2):800-805. |
| [24] | Minh N Q .[J].Journal of the American Ceramic Society,1993,76:563. |
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