Ceramist (세라미스트)

The Korean Ceramic Society (한국세라믹학회)
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A brief review of the bilayer electrolyte strategy to achieve high performance solid oxide fuel cells

고성능 고체산화물 연료전지를 위한 이중층 전해질 전략

  • Park, Jeong Hwa (Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST)) ;
  • Kim, Doyeub (Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST)) ;
  • Kim, Kyeong Joon (Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST)) ;
  • Bae, Kyung Taek (Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST)) ;
  • Lee, Kang Taek (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST))
  • 박정화 (대구경북과학기술원 에너지공학전공) ;
  • 김도엽 (대구경북과학기술원 에너지공학전공) ;
  • 김경준 (대구경북과학기술원 에너지공학전공) ;
  • 배경택 (대구경북과학기술원 에너지공학전공) ;
  • 이강택 (한국과학기술원 기계공학과)
  • Received : 2020.05.05
  • Accepted : 2020.06.02
  • Published : 2020.06.30
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Abstract

The solid oxide fuel cells (SOFCs) are the one of the most promising energy conversion devices which can directly convert chemical energy into electric power with high efficiency and low emission. The lowering operating temperature below 800 ℃ has been considered as the mostly considerable research and development for commercialization. The major issue is to maintain reasonably high performance of SOFCs at reduced temperatures due to increment of polarization resistance of electrodes and electrolyte. Thus, the alternative materials with high catalytic activities and fast oxygen ion conductivity are required. For recent advances in electrolyte materials and technology, newly designed, highly conductive electrolyte materials and structural engineering of them provide a new path for further reduction in ohmic polarization resistance from electrolytes. Here, a powerful strategy of the bilayer concept with various oxide electrolytes of SOFCs are briefly reviewed. These recent developments also highlight the need for electrolytes with greater conductivity to achieve a high performance, thus providing a useful guidance for the rational design of cell structures for SOFCs. Moreover, cell design, materials compatibility, processing methods, are discussed, along with their role in determining cell performance. Results from state-of-the-art SOFCs are presented, and future prospects are discussed.

Keywords

References

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