Performance and Thermal Properties of Ni/Mo Metal-Supported Solid Oxide Fuel Cell

Abstract

In this study, both long term durability and thermal properties (e.g., Thermal conductivity and diffusivity) test are executed on a large area of 10×10×1.2 cm molybdenum (Mo)-containing nickel (Ni)-based alloy-supported solid oxide fuel cell (SOFC). The porous interconnected networks of Ni-Mo alloy are made of introducing pyrolyzable filler during fabrication processes. The functional layers of cell is prepared by using an atmospheric plasma spraying technology. The 10×10 cm2 MS-SOFC with effective electrode area of 81 cm2 shows the open circuit voltages is 1.09 V at 700°C. The measured maximum output powers (@0.8 V) of this cell is 44.6 W at 700 °C respectively. In the long term durability test, the cell voltages are measured in a constant current mode (400 mA/cm2) for ~2600 h at 700 °C. The thermal conductivity (@25-300°C) of porous alloy substrate (7.5% pyrolyzable filler) sintered at 1250°C is in the range of 9.8–12 W/m.K.