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Recent progress in oxygen electrodes for protonic ceramic electrochemical cells
Oh Seeun,Kim Hyeonggeun,Jeong Incheol,Kim Dongyeon,Yu Hyeongmin,Lee Kang Taek 한국세라믹학회 2024 한국세라믹학회지 Vol.61 No.2
Protonic ceramic electrochemical cells, a promising technology for energy conversion and storage, have garnered significant interest in recent years owing to their superior low-temperature (< 600 °C) performance relative to solid oxide electrochemical cells. However, the sluggish kinetics of oxygen electrodes have impeded further advancements. Despite considerable research efforts, the development of practically applicable oxygen electrodes remains challenging. We herein review the recent research focusing on the fundamental understanding and development of oxygen electrode materials. Furthermore, we provide a range of material design strategies for enhancing the catalytic activity of oxygen electrodes along with a concise overview of potential derivative applications. Finally, the perspectives and potential directions for the development of oxygen electrodes for high-performance protonic ceramic electrochemical cells are presented.
Kim Doyeub,Jeong Incheol,Kim Kyeong Joon,Bae Kyung Taek,Kim Dongyeon,구종언,Yu Hyeongmin,Lee Kang Taek 한국세라믹학회 2022 한국세라믹학회지 Vol.59 No.2
Solid oxide fuel cells (SOFCs), which are widely viewed as the next-generation energy conversion devices, provide envi- ronmentally friendly power generation by direct conversion of chemical energy with high effi ciency and less pollutant emissions. However, their high operating temperatures limit their usability in applications, such as distributed generation of electricity and heat, power plants, and transportation. At reduced temperatures, the electrolytes and electrodes used in SOFCs experience sluggish oxygen transport kinetics. Therefore, the development of materials with high oxygen ion conduction and unique cell designs is needed to achieve higher performance. This article provides an overview of the recent progress on solid oxide electrolyte materials, unique cell designs featuring bilayer electrolytes, and resulting microstructures at lower operating temperatures.