JMP  Vol.4 No.6 , June 2013
Effect of Ca on the Properties of Gd-Doped Ceria for IT-SOFC

Ceria based electrolyte materials are very useful in intermediate-temperature solid oxide fuel cell (IT-SOFC). The compositions Ce0.85Gd0.15 - xCaxO2 - δ (x = 0.0 - 0.075) were prepared through sol-gel method. Their structure was studied by X-ray diffraction. Dense ceramic Ce0.85Gd0.15 - xCaxO2 - δ samples were prepared by sintering the pellets at 1300°C. The lattice parameter was calculated by Rietveld refinement of XRD patterns. Four probe A.C. impedance spectroscopy was used to study the total ionic conductivity of doped and co-doped ceria ceramics in the temperature range 200°C - 700°C. The Ce0.85Gd0.15 -xCaxO2 -δ composition showed maximum ionic conductivity with less activation energy.

Cite this paper
S. Ramesh, G. Upender, K. Raju, G. Padmaja, S. Reddy and C. Reddy, "Effect of Ca on the Properties of Gd-Doped Ceria for IT-SOFC," Journal of Modern Physics, Vol. 4 No. 6, 2013, pp. 859-863. doi: 10.4236/jmp.2013.46116.
[1]   H. Inaba and H. Tagawa, Solid State Ionics, Vol. 83, 1996, pp. 1-16. doi:10.1016/0167-2738(95)00229-4

[2]   J. A. Kilner, Solid State Ionics, Vol. 129, 2000, pp. 13-23. doi:10.1016/S0167-2738(99)00313-6

[3]   B. C. H. Steele, Solid State Ionics, Vol. 129, 2000, pp. 95-110. doi:10.1016/S0167-2738(99)00319-7

[4]   S. Ramesh, V. P. Kumar, P. Kistaiah and C. Vishnuvardhan Reddy, Solid State Ionics, Vol. 181, 2010, pp. 86-91. doi:10.1016/j.ssi.2009.11.014

[5]   S. Ramesh and C. Vishnuvardhan Reddy, Acta Physica Polonica A, Vol. 115, 2009, pp. 909-913.

[6]   H. D. Wiemhofer, Solid State Ionics, Vol. 117, 1999, pp. 229-243. doi:10.1016/S0167-2738(98)00408-1

[7]   K. Kim, B. H. Kim and D. Lee, Journal of Power Sources, Vol. 90, 2000, pp. 139-143. doi:10.1016/S0378-7753(00)00389-X

[8]   Y. Liu, B. Li B, X. Wei and W. J. Pan, Journal of the American Ceramic Society, Vol. 91, 2008, pp. 3926-3930. doi:10.1111/j.1551-2916.2008.02748.x

[9]   X. Sha, Z. Lu, X. Huang, J. Miao, Z. Liu, X. Xin, Y. Zhang and W. Su, Journal of Alloys and Compounds, Vol. 433, 2007, pp. 274-278. doi:10.1016/j.jallcom.2006.06.062

[10]   F. Y. Wang, B. Z. Wan and S. Cheng, Journal of Solid State Electrochemistry Communications, Vol. 9, 2005, pp. 168-173.

[11]   F. Y. Wang, S. Chen, Q. Wang, S. Yu and S. Cheng, Catalysis Today, Vol. 97, 2004, pp. 189-194. doi:10.1016/j.cattod.2004.04.059

[12]   N. Cioatera, V. Parvulescu, A. Rolle and R. N. Vannier, Solid State Ionics, Vol. 180, 2009, pp. 681-687. doi:10.1016/j.ssi.2009.02.025

[13]   Y. F. Zheng, H. T. Gu, H. Chen, L. Gao, X. F. Zhu and L. C. Guo, Materials Research Bulletin, Vol. 44, 2009, pp. 775-779. doi:10.1016/j.materresbull.2008.09.021

[14]   H. Yoshida, T. Inagaki, K. Miura, M. Inaba and Z. Ogumi, Solid State Ionics, Vol. 160, 2003, pp. 109-116. doi:10.1016/S0167-2738(03)00153-X

[15]   R. D. Shannon, Acta Crystallographica Section A, Vol. 32, 1976, pp. 751-767. doi:10.1107/S0567739476001551

[16]   W. Lai and S. M. Haile, Journal of the American Ceramic Society, Vol. 89, 2005, pp. 2979-2997. doi:10.1111/j.1551-2916.2005.00740.x