평관형 고체 산화물 연료전지의 연료극 지지체 NiO/YSZ의 환원 및 재산화 거동 특성 = Redox Behaviors of NiO/YSZ Anode Tubein Anode-Supported Flat Tubular SolidOxide Fuel Cells

다국어 초록 (Multilingual Abstract)

The redox behaviors of anode-supported flat tube for solid oxide fuel cell has been studied. The mass change of the extruded NiO/YSZ anode flat tube during redox cycling was examined by thermogravimetric analysis(TGA). The result of TGA was shown a rapidly mass change in the range of 455 - 670 ℃ and the reoxidation of the NiO/YSZ anode was almost completed at 750 ℃. The starting temperature of reoxidation and the maximum temperature of oxidation rate decreased with increasing the reoxidation cycle, which is attributed to the increased porosity caused by volume change. Bending strengths of the NiO/YSZ anode after redox cycling were 96 - 80 MPa and the bending strength decreased slightly with increasing the redox cycle. On the other hand, the bending strength of the NiO/YSZ anode with electrolyte showed 130 MPa after first redox cycling but decreased rapidly with increasing the redox cycle. From the results of the bending test and the microstructure observation, we conclude that the crack initiation of the electrolyte-coated NiO/YSZ anode was induced easily at interface of electrolyte/anode tube and propagated cross the electrolyte.

참고문헌 (Reference)

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