| SOFC 음극의 기공구조가 음극특성에 미치는 영향 |
| 허장원, 이동석1, 이종호1, 김재동1, 김주선1, 이해원1, 문주호 |
연세대학교 세라믹공학과
1한국과학기술연구원 나노재료연구센터 |
| Effect of the Pore Structure on the Anodic Property of SOFC |
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| ABSTRACT |
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Solid Oxide Fuel Cells (SOFC) are of great interest of next generation energy conversion system due to their high energy efficiency and environmental friendliness. The basic SOFC unit consists of anode, cathode and solid electrolyte. Among these components, anode plays the most important role for the oxidation of fuel to generate electricity and also behaves as a substrate of the whole cell. It is normally requested that the anode materials should have the high electrical conductivity and gas permeability to reduce the polarization loss of the cell. In this study, the effect of pore former on the microstructure of anode substrate was investigated and thus on the electrical conductivity and the gas permeability. According to the results, microstructure and electrical conductivity of anode substrate were greatly influenced by the shape of pore former and especially by the anisotrpy of the pore former. The use of anisotropic pore former is supposed to deteriorate the cell performance by which the electrical conduction path is disconnected but also the effective gas diffusion path for the fuel is reduced. |
| Key words:
Pore structure, Ni-YSZ composite, Electrical conductivity |
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