Carbon Monoxide Fueled Cone-Shaped Tubular Solid Oxide Fuel Cell with (Ni0.75Fe0.25-5%MgO)/YSZ Anode

Abstract

An anode-supported cone-shaped tubular solid oxide fuel cell (SOFC) with (Ni0.75Fe0.25-5%MgO)/YSZ anode is prepared and is directly operated on dry and moist CO fuel, respectively. At 800°C, the cell exhibits a maximum power density (MPD) of 424 mWcm−2 for dry CO and 388 mWcm−2 for moist CO. The durability test results show no significant degradation in performance for this kind of cell operated on either dry or moist CO after an operation time of 40 h at a constant current of 83 mA cm−2 at 800°C, while the cell with Ni/YSZ anode, in comparison, fails rapidly. A two-cell-stack based on the above mentioned SOFCs is fabricated and tested by direct utilization of moist CO as fuel. The SOFC stack presents an open circuit voltage (OCV) of 2 V and a maximum output power of 4 W at 800°C. And it exhibits good stability and dependability during an operation time of 90 h. The results demonstrate that (Ni0.75Fe0.25-5%MgO) /YSZ would be a promising anode for SOFC operating on CO or CO-contained fuels.