Effect of La3+, Pr3+, and Sm3+ triple-doping on structural, electrical, and thermal properties of ceria solid electrolytes for intermediate temperature solid oxide fuel cells
作者： Chittimadula Madhuri , Kasarapu Venkataramana , Jada Shanker , C. Vishnuvardhan Reddy
DOI: 10.1016/J.JALLCOM.2020.156636
关键词: Cerium 、 Analytical chemistry 、 Ionic conductivity 、 Materials science 、 Raman spectroscopy 、 Activation energy 、 Fast ion conductor 、 Dielectric spectroscopy 、 Dopant 、 Oxide 、 Mechanical engineering 、 Materials Chemistry 、 Mechanics of Materials 、 Metals and Alloys
摘要: Abstract In the present study, we have investigated effect of La3+, Pr3+, and Sm3+ triple-doping on structural, electrical, thermal properties ceria (Ce1–x(Lax/3Prx/3Smx/3)O2-δ). X-ray diffraction studies confirm formation samples with single-phase cubic-fluorite structure (JCPDS PDF File No: 34-0394). The lattice parameter values increases increasing dopant concentration (from 5.4190 A to 5.4503 A), shows that dopants get totally dissolved into Cerium site. All prepared were sintered at 1300 °C for 4 h. relative densities found be higher than 95% high value is observed composition LPS8 i.e. 97.8%. calculated crystalline size in range 46 53 nm. Scanning electron microscope energy dispersive spectroscopic techniques reveal surface-microstructure presence elemental confirmation compositions. average grain between 231 366 nm. Raman spectroscopy study reveals existence oxygen vacancies all compositions estimated composition. impedance revealed total ionic conductivity activation energies Ce0.76La0.08Pr0.08Sm0.08O2-δ (LPS8) displays highest 0.043 S/cm low 0.76 eV. Matched expansion coefficient sample already existing electrode materials, makes it as an effective electrolyte material intermediate temperature–solid oxide fuel cell applications.
elsevier.com
sci-hub.st 参考文章(61)
S. Ramesh, K.C. James Raju, Preparation and characterization of Ce1−x(Gd0.5Pr0.5)xO2 electrolyte for IT-SOFCs International Journal of Hydrogen Energy. ,vol. 37, pp. 10311- 10317 ,(2012) , 10.1016/J.IJHYDENE.2012.04.008
Brian C. H. Steele, Angelika Heinzel, Materials for fuel-cell technologies Nature. ,vol. 414, pp. 345- 352 ,(2001) , 10.1038/35104620
H Inaba, Ceria-based solid electrolytes Solid State Ionics. ,vol. 83, pp. 1- 16 ,(1996) , 10.1016/0167-2738(95)00229-4
Jose Manuel López, Alexander L. Gilbank, Tomás García, Benjamín Solsona, Said Agouram, Laura Torrente-Murciano, The prevalence of surface oxygen vacancies over the mobility of bulk oxygen in nanostructured ceria for the total toluene oxidation Applied Catalysis B-environmental. ,vol. 174, pp. 403- 412 ,(2015) , 10.1016/J.APCATB.2015.03.017
Xiaomin LIN, Qiuyue LÜ, Lili ZHU, Xiaomei LIU, Synthesis and characterization of Ce0.8Sm0.2–xPrxO2–δ(x=0.02–0.08) solid electrolyte materials Journal of Rare Earths. ,vol. 33, pp. 411- 416 ,(2015) , 10.1016/S1002-0721(14)60434-8
V KHARTON, F MARQUES, A ATKINSON, Transport properties of solid oxide electrolyte ceramics: a brief review Solid State Ionics. ,vol. 174, pp. 135- 149 ,(2004) , 10.1016/J.SSI.2004.06.015
Jeffrey W. Fergus, Electrolytes for solid oxide fuel cells Journal of Power Sources. ,vol. 162, pp. 30- 40 ,(2006) , 10.1016/J.JPOWSOUR.2006.06.062
V. Prashanth Kumar, Y.S. Reddy, P. Kistaiah, G. Prasad, C. Vishnuvardhan Reddy, Thermal and electrical properties of rare-earth co-doped ceria ceramics Materials Chemistry and Physics. ,vol. 112, pp. 711- 718 ,(2008) , 10.1016/J.MATCHEMPHYS.2008.06.030
J. A. Kilner, Defects and Conductivity in Ceria-based Oxides Chemistry Letters. ,vol. 37, pp. 1012- 1015 ,(2008) , 10.1246/CL.2008.1012
V. Venkatesh, V. Prashanth Kumar, R. Sayanna, C. Vishnuvardhan Reddy, Preparation, Characterization and Thermal Expansion of Pr Co-Dopant in Samarium Doped Ceria Advances in Materials Physics and Chemistry. ,vol. 02, pp. 5- 8 ,(2012) , 10.4236/AMPC.2012.24B002