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Abstract
The anode microstructure is crucial for the performance of solid oxide fuel cell(SOFC). The porous anode with high porosity and long cylindrical pores was prepared by using cotton-fiber as pore-former. With Ni-yttria stabilized zirconia (YSZ) as anode, La0.85Sr0.15MnO3-YSZ as cathode, YSZ electrolyte-supported cell was fabricated by slurry coating method. For a comparison, the unit cell with the conventional flour as anode pore former was prepared. All the as-prepared cells were measured in hydrogen at 650 to 800 °C. The microstructure of tested cells was observed by scanning electron microscopy (SEM). The SEM shows that the long cylindrical pores produced by cotton-fibers were beneficial to provide continuous gas pathways for rapid diffusion of fuel and reaction products in the anode. Compared the flour of 373.74 mW·cm-2at 800 °C, the maximum density of unit-cell prepared by cotton-fibers was higher than 900 mW·cm-2, which was attribute to an enlarger active reaction sites created by cotton-fibers for hydrogen oxidation.
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