Fabrication of Functionally Graded SOFC by APS.

Autor: Yang, Y.Z., Zhang, H.O., Wang, G.L., Xia, W.S.
Zdroj: Journal of Thermal Spray Technology; Dec2007, Vol. 16 Issue 5/6, p768-775, 8p
Abstrakt: Atmospheric plasma spray (APS) was used to prepare the planar positive/electrolyte/negative (PEN) and mono-block layer built (MOLB) type PEN solid oxide fuel cells (SOFCs). On the basis of the spraying conditions optimized previously and the self-developed functionally graded powder feeder system, two types of PEN cells were fabricated. Then the microstructure and material composition of the PEN cells were analyzed. The results show that graded layers formed between the electrodes and electrolyte. Moreover, the material composition and the porosity of the graded layers vary gradually. In particular, the porosities of the resultant anode and cathode reach 32.74 and 32.24%, respectively. Using the AC complex impedance technique, the conductivity of the MOLB type composite electrode is tested. The electrical conductivity of the MOLB type composite electrode with the graded layers is larger than that without the graded layers. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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