Study on Diffusion of Copper of SOFC Cu-Based Anodes in Co-Sintering with Electrolyte

Abstract:

Cu-based anode has no or little catalytic activity to reaction of precipitating carbon during using carbon-hydrogen fuel, which can avoid failure or disintegration of SOFC caused by catalytically precipitating carbon resulting from Ni-based anode. However, the melting point of CuO, that is 1148°C, is far below the sintering temperature of electrolyte which limits the use of Cu-based anode. So the property of sintering of Cu-based anode between 1050°C and 1150°C was studied by co-pressing and co-sintering Cu-based anode with electrolyte. The result shows that the diffusion of copper in the electrolyte is not apparent when the co-sintering temperature is below 1130°C. At 1140°C, the Matano plane moved to anode side and the diffusion coefficient of copper in the electrolyte is relevant to concentration of copper which is 0.543×10^-8-1.74×10^-8(cm²•s^-1) when the content of copper is 1.51%~18.7%.

• Periodical: Advanced Materials Research (Volumes 415-417)
• Pages: 1647-1650
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.415-417.1647
• Online since: December 2011
• Authors: Jun Peng, Song Bo Li, Wen Guang Zhao, Xi Wen Song, Sheng Li An
• Keywords: Co-Sinter, Cu-Based Anode, Diffusion, Fuel Cell (FC)

References

[1] W.Lehnert, J.Meusinger. Journal of Power Sources, Vol.87(2000), p.57.

[2] Zi-feng MA, Bi-chun HUANG. Chinese Journal of power Sourse, Vol. 23(1999),p.164( in Chinese).

[3] Neil J.Coe. Catalysis Letters, Vol.49(1997), p.189.

[4] A.Kaiser J.L. Bradley P.R. Slater. Solid State Ionics, Vol.135(2000), p.519.

[5] Qing-long YUAN, Cheng-zhong CHI, Yong-an SU. Heat Treatment of Metals, Vol.28(2003), p.51( in Chinese).

[6] Guo-xun LIU, in Principle of Metallography, edited by Metallurgical Industry Press, Beijing, Chinese(1980). ( in Chinese).

[7] Xiao-zhu WEI. Journal of Langfang Teachers College, Vol.4(2005), p.34(in Chinese).

[8] Wei-xi SONG. In Metallography, edited by Metallurgical Industry Press, Beijing, Chinese(1985)( in Chinese).