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Ulsan National Institute of Science and Technology's research team (company), Georgia Institute of Technology and Dongyi University have developed a new type of cathode material that has excellent performance and strong reliability even in the middle of the temperature range. As a high-power-density device, fuel cells can be converted into chemical energy that is directly converted into electrical energy for efficiency and environmental protection. On the basis of oxide ion-conducting electrolytes for solid oxide fuel cells (SOFCs), there are several advantages over other types of fuel cells, including relatively inexpensive material costs, low sensitivity of impurities in the fuel, and high overall efficiency.
In order to make the solid oxide fuel cell technology more affordable, it is necessary to further reduce the material whose operating temperature is basically less expensive, so it can be used for the battery module. There will be more choices for other components of the material with lower operating temperatures.
However, at lower operating temperatures, the problem is that anodes and/or electrolytes that are degraded by the efficiency of the cathode are more pronounced than one. This means that the cathode, as a key component of the solid oxide fuel cell, contributes the greatest polarization loss at intermediate temperatures. As a result, the development of viable cryogenic solid oxide fuel cells requires the production of highly efficient cathode materials.
A UNIST research team attempted to co-doped erbium, iron, to successfully produce a significant performance and present materials at lower operating temperatures. Promote optimal combination to create excellent oxygen reduction reaction, novel pore structure, operating conditions, while maintaining good compatibility and stability, greatly improve oxygen ion diffusion and surface oxygen exchange.
Professor Jin said: “The hardest part of this research is to find the best performance and robustness of the best Sr and iron compositions.†“A variety of studies have previously been made on various structures that attempt to coat the perovskite structure. Other groups, but they didn't succeed, and the performance was better at lower operating temperatures."
New materials developed by the research team UNIST, led by Professor Guntae Gold, can significantly improve the efficiency, reliability, and solidity of solid-oxide fuel cells compared to previously published materials.
This new new cathode material enables fuel cell designers to have more flexibility in the selection, which leads to lower fuel cell costs and ultimately a step closer to highly reliable and efficient fuel cell fuel cell assembly materials.
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