Evaluation and Optimization of Ba0.2Sr0.8Co0.9Nb0.1O3-δ-Gd0.1Ce0.9O1.95 Composite Cathodes for IT-SOFCs

Lei Lei Zhang; Jin Hua Huang; Zhao Yuan Song; Yi Dan Fu; Mo Liu; Tian Min He

doi:10.4028/www.scientific.net/MSF.787.221

Paper Titles

Molecular Dynamics Study on Shear Property of Single-Crystal Bi₂Te₃
p.198

Preparation and Characterization of Electrodeposited Cu_xBi₂Te₃ Thermoelectric Films
p.205

Effects of Oxygen-Reduction on Thermoelectric Properties of Sr_0.61Ba_0.39Nb₂O₆ Ceramics
p.210

Thermal Aging Behavior of CoSb₃ with Protective Mo Coating
p.215

Evaluation and Optimization of Ba_0.2Sr_0.8Co_0.9Nb_0.1O_3-_δ-Gd_0.1C_e0.9O_1.95 Composite Cathodes for IT-SOFCs
p.221

High Quality AlN Thin Films Deposited by Middle-Frequency Magnetron Sputtering at Room Temperature
p.227

Influence of RTA Treatment on the Properties of ZnO-CeO₂ Dielectric Films
p.232

Effects of (Li, Ce) Co-Doping on Microstructure, Dielectric and Ferroelectric Properties of Strontium Niobate Ceramics
p.236

Investigation of the Morphotropic Phase Boundary (MPB) of (1-x-y)BaZrO₃-x(K_0.45Na_0.5Li0.05)NbO₃-yBi (Mg_0.5Ti_0.5)O₃
p.242

HomeMaterials Science ForumMaterials Science Forum Vol. 787Evaluation and Optimization of...

Evaluation and Optimization of Ba_0.2Sr_0.8Co_0.9Nb_0.1O_3-_δ-Gd_0.1C_e0.9O_1.95 Composite Cathodes for IT-SOFCs

Abstract:

Ba_0.2Sr_0.8Co_0.9Nb_0.1O_3-_δ (BSCN0.2)-xGd_0.1Ce_0.9O_1.95 (GDC) (x = 10, 20, 30 and 40 wt.%) composite cathodes were investigated for the potential application in the IT-SOFCs. The results of chemical compatibility measurement show that a small number of Gd and/or Ce ions may melt into the lattice of BSCN0.2 to form BSCN0.2-GDC solid solution. Thermal expansion coefficients effectively reduced by the incorporation of GDC. The electrochemical performance of BSCN0.2-xGDC composite cathodes increased with increasing x from 10 to 30 wt.%. When x = 30 wt.%, the area specific resistances were only 0.040 and 0.017 Ω cm² at 750 and 800^oC, respectively. This improved electrochemical performance is attributed to the good thermal expansion match between BSCN0.2-xGDC composite cathode and GDC electrolyte, and the increased oxygen vacancy concentration. With further increasing x, the electrochemical performance of the composite cathode decreased. This result may be due to the ambipolar resistance model of porous composite cathode and the poor electrical conductivity of BSCN-40GDC. The maximum power densities of a BSCN0.2-30GDC/La_0.9Sr_0.1Ga_0.8Mg_0.2O_3-_δ/NiO-Sm_0.2Ce_0.8O_1.9 single-cell achieve 537 and 722 mW cm^-2 at 750 ^oC and 800^oC, respectively. These results indicate that the BSCN0.2-30GDC composite cathode is a promising candidate for IT-SOFC.

You might also be interested in these eBooks

Energy, Environment and Functional Materials

View Preview

Info:

Periodical:

Materials Science Forum (Volume 787)

Pages:

221-226

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.787.221

Citation:

Cite this paper

Online since:

April 2014

Authors:

Lei Lei Zhang*, Jin Hua Huang, Zhao Yuan Song, Yi Dan Fu, Mo Liu, Tian Min He

Keywords:

Composite Cathode, Electrical Conductivity, Electrochemical Performance, Solid Oxide Fuel Cell (SOFC), Thermal Expansion

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

* - Corresponding Author

References

[1] T. Horita, K. Yamaji, M. Ishikawa, N. Sakai, H. Yokokawa, T. Kawada: J. Electrochem. Soc. Vol. 145 (1998), p.3196.

Google Scholar

[2] W. Zhou, Z.P. Shao, R. Ran, P.Y. Zeng, H.X. Gu, W.Q. Jin, N.P. Xu: J. Power Sources Vol: 168 (2007), p.330.

Google Scholar

[3] F.S. Baumann, J. Fleig, H.-U. Habermeier, J. Maier: Solid State Ionics Vol. 177 (2006), p.3187.

DOI: 10.1016/j.ssi.2006.07.057

Google Scholar

[4] Steven P. Simner, Michael D. Anderson, James E. Coleman, JeffryW. Stevenson: J. Power Sources Vol. 161 (2006), p.115.

Google Scholar

[5] Himeko Orui, Kimitaka Watanabe, Reiichi Chiba, Masayasu Arakawa: J. Electrochem. Soc. Vol. 151 (2004), p. A1412.

Google Scholar

[6] C.R. Xia, W. Rauch, F.L. Chen , M.L. Liu: Solid State Ionics Vol. 149 (2002), p.11.

Google Scholar

[7] Z. Shao, S.M. Haile: Nature Vol. 431 (2004), p.170.

Google Scholar

[8] F.Wang, Q.J. Zhou, T.M. He, G.D. Li, H. Ding: J. Power Sources Vol. 195 (2010), p.3772.

Google Scholar

[9] L.L. Zhang, W. Long, F.J. Jin, T.M. He: Int. J. Hydrogen Energy Vol. 38 (2013), p.7947.

Google Scholar

[10] N. Li, B. Wei, Z. Lü, X.Q. Huang, W.H. Su: Journal of Alloys and Compounds Vol. 509 (2011), p.3651.

Google Scholar

[11] Y.J. Leng, S.H. Chan, Q.L. Liu: Int. J. Hydrogen Energy Vol. 33 (2008), p.3808.

Google Scholar

[12] V.Dusastre, J.A. Kilner: Solid State Ionics Vol. 126(1-2) (1999), p.163.

Google Scholar

[13] L.G. Cong, T.M. He, Y. Ji, P.F. Guan, Y.L. Huang W.H. Su: J. Alloys Compd. Vol. 348 (2003), pp.325-31.

Google Scholar

[14] Y.H. Zhang, X.Q. Huang, Z. Lu, Z.G. Liu, X.D. Ge, J.H. Xu: J. Power Sources Vol. 160 (2006), pp.1217-20.

Google Scholar

[15] A. Aguadero, D. Pérez-Coll, C. de la Calle, J.A. Alonso, M.J. Escudero, L. Daza. J. Power Sources Vol. 192 (2009), p.132.

DOI: 10.1016/j.jpowsour.2008.12.138

Google Scholar

[16] B. Wei, Z. Lü, S. Li, Y. Liu, K. Liu, W. Su: Electrochem. Solid State Lett., Vol. 8 (2005), p. A428.

Google Scholar