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

In this study, continuous manufacturing processes including spray drying, compression molding and sintering are 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 (Ce_0.55La_0.45O_2-δ -Ni, LDC-Ni), electrolyte (La_0.8Sr_0.2Ga_0.8Mg_0.2O_3-δ, LSGM) and cathode (Sm_0.5Sr_0.5CoO_3-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.