Ni-Mo Porous Alloy Fabricated as Supporting Component for Metal-Supported Solid Oxide Fuel Cell and Cell Performance

Abstract

In this study, a continuous manufacturing process including spray drying, compression molding and sintering steps is developed and constructed to produce molybdenum (Mo)-containing nickel (Ni)-based porous alloy as a supporting component for metal-supported solid oxide fuel cell (SOFC). The porous interconnected networks of Ni-Mo alloy are made of introducing pyrolyzable filler during fabrication processes. The particle size distribution analysis results showed d50 of starting material (E.g., Ni, Mo, pyrolyzable filler and binder) after spray drying is 40.7 um. A compression load of 35 ton is applied to form a specimen with size of 60×60×1.2 mm and then sintered at 1200°C to obtain porous alloy. The anode (Ce0.55La0.45O2- δ -NiO, LDC-NiO), electrolyte (La0.8Sr0.2Ga0.8Mg0.2O3-δ, LSGM) and cathode (Sm0.5Sr0.5CoO3- δ, SSC) is coated by using an atmospheric plasma spraying (APS) technique. The active electrode area of the cell is 16cm2 and the open circuit voltage (OCV) is higher than 1.0 V under cell performance testing from 600 to 750 °C, indicating that a fully dense layer of LSGM electrolyte is successfully fabricated via APS coating process. The measured maximum output power densities (@0.6V) of this cell have reached 1196, 1012, 716 and 415 mW/cm2 at 750, 700, 650 and 600 °C respectively, by employing H2 as fuel and air as oxidant.