| 초록 |
Recently, as matrix materials for molten carbonate fuel cells(MCFCs), α-LiAlO2 matrix has been mainly selected because α-LiAlO2 is more stable than γ-LiAlO2at MCFC conditions.The objective of this study is to develop a reinforced α-LiAlO2 matrix for MCFC by using nano-scale γ-Al2O3 (50-60nm), which was chosen for reinforcing α-LiAlO2 matrix because it was reacted with Li2CO3, producing α- LiAlO2. Another reason for selecting γ -Al2O3 is the easy control of viscosity during ball mill process. In a previous literature, the sol coating of LiAlO2 has been studied for reinforcing electrolyte support. But, this process has suffered from the control of the slurry viscosity, which results in impossible tape casting process. In contrast, there is no viscosity problem because the form of γ -Al2O3 used is powders. So, the tape casting can be easily conducted. The physical properties of α-LiAlO2 electrolyte support reinforced by γ-Al2O3 were examined by 3-point bending strength test, scanning electron microscope and X-ray powder diffraction. The electrochemical performance was also examied by electrochemical impedance spectroscopy and an electric load. |
