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Novel fabrication technique of hollow fibre support for micro-tubular solid oxide fuel cells

Othman, Mohd. Hafiz Dzarfan and Droushiotis, Nicolas and Wu, Zhentao and Kelsall, Geoff and Li, Kang (2011) Novel fabrication technique of hollow fibre support for micro-tubular solid oxide fuel cells. Journal of Power Sources, 196 (11). pp. 5035-5044. ISSN 0378-7753

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Official URL: http://dx.doi.org/10.1016/j.jpowsour.2011.02.006

Abstract

In this work, a cerium-gadolinium oxide (CGO)/nickel (Ni)-CGO hollow fibre (HF) for micro-tubular solid oxide fuel cells (SOFCs), which consists of a fully gas-tight outer electrolyte layer supported on a porous inner composite anode layer, has been developed via a novel single-step co-extrusion/co-sintering technique, followed by an easy reduction process. After depositing a multi-layers cathode layer and applying current collectors on both anode and cathode, a micro-tubular SOFC is developed with the maximum power densities of 440–1000 W m-2 at 450–580 °C. Efforts have been made in enhancing the performance of the cell by reducing the co-sintering temperature and improving the cathode layer and current collection from inner (anode) wall. The improved cell produces maximum power densities of 3400–6800 W m-2 at 550–600 °C, almost fivefold higher than the previous cell. Further improvement has been carried out by reducing thickness of the electrolyte layer. Uniform and defect-free outer electrolyte layer as thin as 10 µm can be achieved when the extrusion rate of the outer layer is controlled. The highest power output of 11,100 W m-2 is obtained for the cell of 10 µm electrolyte layer at 600 °C. This result further highlights the potential of co-extrusion technique in producing high quality dual-layer HF support for micro-tubular SOFC.

Item Type:Article
Uncontrolled Keywords:co-extrusion, co-sintering, dual-layer hollow fibre, micro-tubular SOFC
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:29503
Deposited By: Yanti Mohd Shah
Deposited On:19 Mar 2013 00:45
Last Modified:25 Apr 2019 01:15

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