Application of Cu-Based Material on Solid Oxide Fuel Cell (SOFC) and Development of Melt-Extrusion (ME) Module
Date Issued
2015
Date
2015
Author(s)
Chou, Chih-Shiun
Abstract
This study used Cu-based materials as an anode of solid oxide fuel cells (SOFCs) and conducted the following R&D works. Properties of Cu and Cu-Zn alloy were investigated, including electrical conductivity, coefficient of thermal expansion (CTE), hardness and oxidation behavior. The oxidation-resistance of Cu, Ni and Ti-6Al-4V was investigated and compared. Moreover, the microstructure of the oxide layers was observed to verify the results of TGA test. This study also developed cobalt-doped SDC cermet as an electrolyte for intermediate temperature (IT)-SOFC. The Cu-based electrode provided good electronic conductivity and prevented carbon deposition. The SDC was used as catalyst and ionic conductor. The methods to synthesize SDC and sinter a dense SDC electrolyte were also provided in this study. Maximum power density of the Cu-based SOFC was 112 mW cm-2 at 750 oC. On the other hand, due to a low melting point and good formability of Cu-Zn alloy, it was suitably applied on 3D printing (3DP) technique. As a result, a melt-extrusion (ME) module was designed to print Cu-Zn alloy. The ME module could reach 1100 oC to extrude Cu-Zn alloy. Besides, the heat insulation of the module was excellent, which was 51 oC outside the module while the temperature in the nozzle was 1000 oC.
Subjects
Cu
brass
oxidation kinetics
anode
IT-SOFC
melt-extrusion (ME)
Type
thesis
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