Energy Conversion through Durable Single Chamber Solid Oxide Fuel Cell
High performance and durable single chamber solid oxide fuel cells (SC-SOFCs) are developed for efficient energy conversion at 500-700°C. The cathode is the key to realize the efficient and durable operation of SC-SOFC, as typical cathode materials degrade significantly in a CO2-rich environment. Cobalt-free novel perovskite oxide materials SrSc0.075Ta0.025Fe0.9O3−δ (SSTF75) are fabricated as SC-SOFC cathode. The materials showed excellent activity (very low resistance) towards oxygen reduction reaction (ORR) and high resistance to CO2. SC-SOFC demonstrated excellent stability in CO2 environment and delivered high power density of over 1.4W/cm² at 650°C, exceeding the performance of existing SC-SOFCs.
The SC-SOFCs can be used for combined heat and power co-generation, a backup power source for vehicles and various stationary applications. It can make significant contribution to sustainable energy conversion.