Ce0.85Sm0.15O1.925 (SDC) and La0.9Sr0.1Ga0.8Mg0.2O2.85 (LSGM) were synthesized using Glycine-Nitrate Process (GNP), and the composite electrolytes were prepared by mixing SDC and LSGM. An X-ray diffraction pattern indicated that the mixture of SDC and LSGM consisted of their original phases after heating at 1450 oC for 10 h. The electronic conductivity of SDC-LSGM composite electrolytes were measured by direct current polarization method using Hebb-Wagner ion blocking cell at 700-800 oC in the oxygen partial pressure range of 10-6-10-20 MPa and compared with the results of SDC. Typical polarization curves, which were theoretically predicted, were observed on all the samples. The slopes of lgσe-lgPo2 plot for all the composite electrolytes agreed with the theoretically predicted value of -1/4 at some intermediate oxygen partial pressures and -1/6 at low oxygen partial pressure. The electronic conductivity of SDC-LSGM composite electrolytes decreased with the increase in LSGM content, whereas the ionic transport number ti of all the samples increased with the increase in LSGM content.
参考文献
| [1] | Osamu Yamamoto .Solid oxide fuel cells: fundamental aspects and prospects[J].Electrochimica Acta,2000(15/16):2423-2435. |
| [2] | Feng M;John B G;Huang K;Christopher M .Fuel cells with doped lanthanum gallate electrolyte[J].Journal of Power Sources,1996,63:47. |
| [3] | Katsuhiko Y;Teruhisa H;Masahiko I;Natsuko S Harumi Y .Compatibility of La0 9Sr0 1Ga0 8Mg0 2O2 85 as the electrolyte for SOFCs[J].Solid State Ionics,1998,108:415. |
| [4] | Steele BCH. .Appraisal of Ce1-yGdyO2-y/2 electrolytes for IT-SOFC operation at 500 degrees C[J].Solid state ionics,2000(1/4):95-110. |
| [5] | Zheng M Z;Liu X M;Su W H .Preparation and performance of La1-xSrxCuO3-δ as cathode material in IT-SOFCs[J].Journal of Alloys and Compounds,2005,395:300. |
| [6] | 刘晓梅,苏文辉,梁路光,郭天才,冷静.Study on Rare Earth Electrolyte of Ce0.9RE0.1O2-δ (RE=Pr, Nd, Sm, Gd, Dy)[J].稀土学报(英文版),2003(06):699-700. |
| [7] | Hideaki Inaba;Hiroaki Tagawa .Ceria-based solid electrolytes[J].Solid state ionics,1996(1/2):1-16. |
| [8] | Gabriele B;M.S.Islam;Jan K;Paolo F Mauro G .Reduction process in CeO2-MO and CeO2-M2O3 mixed oxides:a computer simulation study[J].Chemistry of Materials,2003,15:3781. |
| [9] | Xu D;Liu X M;Wang D J;Yi G Y,Gao Y,Zhang D S,Su W H .Fabrication and characterization of SDC-LSGM composite electrolytes material in IT-SOFCs[J].Journal of Alloys and Compounds,2007,429:292. |
| [10] | Tatsumi I;Shinji I;Kei H;Hiroyasu N Yusaku T .Oxide ionic and electronic conduction in Ni-doped LaGaO3-based oxide[J].Solid State Ionics,2004,175:319. |
| [11] | Abrantes J C C;Pérez-coll D;Nú(n)ez P;Frade J R .Electronic transport in Ce0 8Sm0 2O1 9 ceramics under reducing conditions[J].Electrochimica Acta,2003,48:2761. |
| [12] | Marko Hrovat;Ariane Ahmad-KhanIou;Zoran Samard2ija .INTERACTIONS BETWEEN LANTHANUM GALLATE BASED SOLID ELECTROLYTE AND CERIA[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,1999(12/13):2027-2034. |
| [13] | Xiong Y P;Katsuhiko Y;Teruhisa H;Natsuko S Harumi Y .Hole and electron conductivities of 20mol%-REO doped CeO2[J].Journal of the Electrochemical Society,2004,51(03):A407. |
| [14] | Sakai N;Xiong YP;Yamaji K;Yokokawa H;Terashi Y;Seno H .Anomalous conductivity and microstructure in gadolinium doped ceria prepared from nano-sized powder[J].Solid state ionics,2006(26/32):2503-2507. |
| [15] | Taro S;Yoshihiro H;Yuka E;Soichiro S Teruhisa H Harumi Y .Electronic conductivity measurement of Sm-and La-doped ceria ceramics by Hebb-Wagner method[J].Solid State Ionics,2004,174:27. |
| [16] | Hidenori Y;Koichi E;Hiromichi A .Electrical properties and reducibilities of ceria-rare earth oxide systems and there application to solid oxide fuel cell[J].Solid State Ionics,1989,36:71. |
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