KEPCO Journal on Electric Power and Energy

Korea Electric Power Corporation (한국전력공사)
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Synthesis and Properties of Y0.08Sr0.92Fe0.3Ti0.7O3 as Ceramic Anode for SOFC

SOFC의 세라믹 음극물질로서 Y0.08Sr0.92Fe0.3Ti0.7O3의 합성 및 물성 평가

  • Lee, Tae-Hee (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Jeon, Sang-Yun (KEPCO Research Institute, Korea Electric Power Corporation) ;
  • Im, Ha-Ni (Ionics Lab, School of Materials Science and Engineering, Chonnam National University) ;
  • Song, Sung-Ju (Ionics Lab, School of Materials Science and Engineering, Chonnam National University)
  • Received : 2020.06.24
  • Accepted : 2020.09.21
  • Published : 2021.06.30
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Abstract

In general, SOFCs mainly use Ni-YSZ cermet, a mixture of Ni and YSZ, as an anode material, which is stable in a high-temperature reducing atmosphere. However, when SOFCs have operated at a high temperature for a long time, the structural change of Ni occurs and it results in the problem of reducing durability and efficiency. Accordingly, a development of a new anode material that can replace existing nickel and exhibits similar performance is in progress. In this study, SrTiO3, which is a perovskite-based mixed conductor and one of the candidate materials, was used. In order to increase the electrical conduction properties, Y0.08Sr0.92Fe0.3Ti0.7O3, doped with 0.08 mol of Y3+ in Sr-site and 0.03 mol of transition metal Fe3+ in Ti-site, was synthesized and its chemical diffusion coefficient and reaction constant were measured. Its electrical conductivity changes were also observed while changing the oxygen partial pressure at a constant temperature. The performance as a candidate electrode material was verified by predicting the defect area through the electrical conductivity pattern according to the oxygen partial pressure.

Keywords

Acknowledgement

본 연구는 한국전력공사 전력연구원의 자체 연구과제(R17EA04)의 일환으로 수행되었습니다.

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