| 학회 | 한국재료학회 |
| 학술대회 | 2011년 가을 (10/27 ~ 10/29, 신라대학교) |
| 권호 | 17권 2호 |
| 발표분야 | C. Energy and the Environment Technology(에너지 및 환경재료) |
| 제목 | Mechanism for Ni/YSZ nano-composite Anode from Spherical core-shell formation |
| 초록 | We studied a method of manufacturing an anode to restrict contraction in reducing NiO/YSZ by uniformly mixing. In order to mix Ni and YSZ, a sub-micron Ni core surface was coated at high-speed by a mixture of nano-sized YSZ and a spherical core-shell was subsequently formed. The micron-sized core-shell anode powder was then heat treated at 400~1450℃ in an air atmosphere and Ni was extruded and synthesized in nano-size. Subsequently, when the nano-sized mixture of the anode was heat treated and maintained at a temperature of 1450℃, the anode was manufactured, where Ni and YSZ were uniformly distributed with the nano-structure. According to the nano-sized anode powder synthesis process, Ni particles were oxidized at 400~500℃ and became spherical by surface tension. In the case of the spherical core Ni powder, the heat treatment temperature rose to 1250℃ and then a gap between the internal and external pressures occurred due to thermal and tensile stresses. A crack subsequently appeared on the surface, and the heat treatment temperature was increased continuously to increase the pressure gap and then the core Ni extruded as a nano-sized powder, Ni and YSZ uniformly distributed. It was found that the anode of 50-200nm with a consistent structure obtained in this study has electric conductivity that is approximately 3 times larger than that of a commercial anode. |
| 저자 | 안용태1, 최병현1, 지미정1, 구자빈1, 황해진2 |
| 소속 | 1한국세라믹기술원, 2인하대 |
| 키워드 | SOFC; Anode; Core-shell; Nano-structure |
