Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Preparation of $Ce_{0.8}Sm_{0.2}O_{x}$ Electrolyte Thin Film for Solid Oxide Fuel Cells by Electrophoretic Deposition

전기영동법을 이용한 고체산화물 연료전지용 $Ce_{0.8}Sm_{0.2}O_{x}$ 전해질 박막 제조

  • Kim, Dong-Gyu (Department of Chemical Engineering, Chonbuk National University) ;
  • Song, Min-Wu (Department of Chemical Engineering, Chonbuk National University) ;
  • Lee, Kyeong-Seop (Department of Chemical Engineering, Chonbuk National University) ;
  • Kim, Yoen-Su (Department of Dental Technology, Gwang Yang Health University) ;
  • Kim, Young-Soon (Department of Chemical Engineering, Chonbuk National University) ;
  • Shin, Hyung-Shik (Department of Chemical Engineering, Chonbuk National University)
  • 김동규 (전북대학교 화학공학과) ;
  • 송민우 (전북대학교 화학공학과) ;
  • 이경섭 (전북대학교 화학공학과) ;
  • 김연수 (광양보건대학 치기공과) ;
  • 김영순 (전북대학교 화학공학과) ;
  • 신형식 (전북대학교 화학공학과)
  • Published : 2011.12.01
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Abstract

In this work, a nano-sized samaria-doped ceria(SDC) was prepared by a urea-based hydrothermal method and characterized by XRD, FESEM and TEM. It was observed that the increase in synthesis time and temperature gave rise to crystallity and particles size. Moreover, the synthesised powders had a excellent ion-conductivity(0.1 S/cm at 600~$800^{\circ}C$) which is suitable for electrolyte of intermediate temperature-solid oxide fuel cell(IT-SOFC). Subsequently for use as electrolyte for anode-supported IT-SOFC, we tried to deposit the SDC powder on a porous NiO-SDC substrate by electrophoretic deposition(EPD) method. From the FESEM observation, a compact

본 연구에서는 나노 크기의 세리아를 사마리움으로 일부 도핑(samaria-doped ceria(SDC))한 분말을 urea를 첨가제로 사용하여 수열합성법으로 합성하였으며 그 특성들을 XRD, FESEM, TEM 등을 통해 관찰하였다. 합성 시간 및 합성온도가 증가함에 따라 분말의 결정성 및 입도가 증가함을 확인하였다. 또한 이온전도도의 측정을 통해 합성된 SDC 파우더가 중 저온(600~$800^{\circ}C$) 부근에서 0.1 S/cm의 이온전도도를 보여 중 저온형 고체산화물 연료전지(IT-SOFC)의 고체 전해질에 적합함을 확인할 수 있었다. 합성된 SDC 분말은 중·저온 고체산화물 연료전지의 음극지지형 전해질로 사용하기 위해 전기영동 증착 방법을 이용하여 다공성 NiO-SDC 기판 위에 SDC 박막 증착을 시도하였다. 증착 용액은 acetone을 용매로 사용하고, 20V의 인가전압으로 10초간 증착한 결과 얇고 치밀하며 기공이 없는 SDC 박막이 형성되었음을 FESEM 분석을 통해 확인할 수 있었다.

Keywords

References

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