采用溶胶-凝胶法制备了电解质材料La1.9Ba0.1Mo1.9 Al0.1O8.8(LBMA),通过热重-差示扫描量热分析(TG-DSC)、X射线衍射(XRD)、透射电镜(TEM)、扫描电镜(SEM)和电化学阻抗谱(EIS)等方法对样品进行测试研究.研究表明干凝胶经700℃煅烧处理即可得到立方相氧化物LBMA,煅烧后的粉体为分散性较好的球形纳米颗粒,平均粒径约为35 nm.SEM分析和致密度研究表明溶胶-凝胶法制备的粉体具有良好的烧结性能,在1100℃烧结2h能得到相对密度高于98％的致密的陶瓷烧结体.电化学性能研究表明LBMA具有较高的离子电导率,1100℃烧结的LBMA电解质在800℃时电导率达到17.87 mS/cm,电导活化能为1.22 eV,其有望应用于中低温固体氧化物燃料电池.
参考文献
| [1] | E. Courtin;P. Boy;T. Piquero;J. Vulliet;N. Poirot;C. Laberty-Robert .A composite sol-gel process to prepare a YSZ electrolyte for Solid Oxide Fuel Cells[J].Journal of Power Sources,2012(May 15):77-83. |
| [2] | Yu-Lin Kuo;Yun-Yuan Liang .Assessment of thermochemically stable apatite La_(10)(SiO_4)_6O_3 as electrolyte for solid oxide fuel cells[J].CERAMICS INTERNATIONAL,2012(5):3955-3961. |
| [3] | J. R. S. Pereira;S. Rajesh;F. M. L. Figueiredo;F. M. B. Marques.Composite electrodes for ceria-carbonate intermediate temperature electrolytes[J].Electrochimica Acta,2013:71-79. |
| [4] | Parkash, O.;Singh, N.;Singh, N.K.;Kumar, D..Preparation and characterization of ceria co-doped with Ca and Mg[J].Solid state ionics,2012:100-105. |
| [5] | R. Serra;C. Alves;J.C. Oliveira .Synthesis and thermal behavior of La_(9.33)Si_2Ge_4O_(26) apatite for SOFCs[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2012(Suppl.1):480-484. |
| [6] | Ramya Hariharan;Prakash Gopalan .Chemical synthesis and characterization of Ca-substituted YAlO_3 as electrolyte for solid oxide fuel cells[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2010(1/2):528-535. |
| [7] | Chao, C.-C.;Hsu, C.-M.;Cui, Y.;Prinz, F.B. .Improved solid oxide fuel cell performance with nanostructured electrolytes[J].ACS nano,2011(7):5692-5696. |
| [8] | Yen-Pei Fu;Sih-Hong Chen;Jyun-Jyun Huang .Preparation and characterization of Ce_(0.8)M_(0.2)O_(2-δ) (M = Y, Gd,Sm, Nd, La) solid electrolyte materials for solid oxide fuel cells[J].International journal of hydrogen energy,2010(2):745. |
| [9] | Mangalaraja, R.V.;Ananthakumar, S.;Schachtsiek, A.;López, M.;Camurri, C.P.;Avila, R.E. .Synthesis and mechanical properties of low temperature sintered, Sm~(3+) doped nanoceria electrolyte membranes for IT-SOFC applications[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(16/17):3645-3650. |
| [10] | Ning Zuo;Milin Zhang;Zongqiang Mao .Fabrication and characterization of composite electrolyte for intermediate-temperature SOFC[J].Journal of the European Ceramic Society,2011(16):3103-3107. |
| [11] | Chi-Chieh Yao;Dah-Shyang Tsai;Jen-Chieh Lo;Wen-Hung Chung;David P. Wilkinson .Upgrading the performance of La_2Mo_2O_9-based solid oxide fuel cell under single chamber conditions[J].International journal of hydrogen energy,2012(12):9792-9800. |
| [12] | Malavasi L;Kim H;Billinge SJL;Proffen T;Tealdi C;Flor G .Nature of the monoclinic to cubic phase transition in the fast oxygen ion conductor La2Mo2O9 (LAMOX)[J].Journal of the American Chemical Society,2007(21):6903-6907. |
| [13] | Goel, M.;Djurado, E.;Georges, S..Reducibility of La _2Mo _2O _9 based ceramics versus porosity[J].Solid state ionics,2011:97-103. |
| [14] | Marrero-Lopez D;Ruiz-Morales JC;Nunez P;Abrantes JCC;Frade JR .Synthesis and characterization of La2MO2O9 obtained from freeze-dried precursors[J].International Journal of Quantum Chemistry,2004(7):2378-2386. |
| [15] | On the thermodynamic stability of La_2Mo_2O_(9-δ) oxide-ion conductor[J].International journal of hydrogen energy,2010(11):P.5890. |
| [16] | Marrero-Lopez D;Pena-Martinez J;Ruiz-Morales JC;Perez-Coll D;Martin-Sedeno MC;Nunez P .Applicability of La2Mo2-yWyO9 materials as solid electrolyte for SOFCs[J].Solid state ionics,2007(23/24):1366-1378. |
| [17] | Yang JH;Gu ZH;Wen ZY;Yan DS .Preparation and characterization of solid electrolytes La(2-x)A(x)Mo(2-y)W(y)O(9) (A=Sm, Bi)[J].Solid state ionics,2005(5/6):523-530. |
| [18] | Hala T. Handal;VenkataramanThangadurai .Evaluation of chemical stability, thermal expansion coefficient,and electrical properties of solid state and wet-chemical synthesized Y and Mn-codoped CeO-2 for solid oxide fuel cells[J].Journal of Power Sources,2013(Dec.1):458-471. |
| [19] | Mudrika Khandelwal;A. Venkatasubramanian;T.R.S. Prasanna .Correlation between microstructure and electrical conductivity in composite electrolytes containing Gd-doped ceria and Gd-doped barium cerate[J].Journal of the European Ceramic Society,2011(4):559-568. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%