Cotton-Fibers Used as Pore Former for the Anode with High Porosity and Long Cylindrical Pores of Solid Oxide Fuel Cells

• Published in: Applied Mechanics and Materials Vol. 851; no. Advanced Materials, Structures and Mechanical Engineering II; pp. 78 - 83
• Main Authors: Abuliti, Abudula, Guan, Guo Qing, You, Hong Xin, Qu, Bin, Zhao, Cong, Li, Can
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 01.08.2016
• Subjects: Anodes; Electrolytic cells; Flour; Hydrogen; Microstructure; Porosity; Scanning electron microscopy; Yttria stabilized zirconia; Long Cylindrical Pores; Anode; Cotton-Fiber; High Porosity; SOFC
• ISBN: 9783038357063; 3038357065
• ISSN: 1660-9336; 1662-7482; 1662-7482
• DOI: 10.4028/www.scientific.net/AMM.851.78

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-2 at 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.