Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
권호 표지
DOI QR코드

DOI QR Code

Fabrication of Electrolyte for Direct Carbon Fuel Cell and Evaluation of Properties of Direct Carbon Fuel Cell

직접탄소 연료전지용 전해질 제조 및 직접탄소 연료전지 특성 평가

  • Pi, Seuk-Hoon (Department of Material Science and Engineering, KAIST) ;
  • Cho, Min-Je (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Lee, Jong-Won (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Lee, Seung-Bok (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Lim, Tak-Hyoung (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Park, Seok-Joo (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Song, Rak-Hyun (Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Shin, Dong-Ryul (Fuel Cell Research Center, Korea Institute of Energy Research)
  • 피석훈 (한국과학기술원 신소재공학부) ;
  • 조민제 (한국에너지기술연구원 연료전지 연구단) ;
  • 이종원 (한국에너지기술연구원 연료전지 연구단) ;
  • 이승복 (한국에너지기술연구원 연료전지 연구단) ;
  • 임탁형 (한국에너지기술연구원 연료전지 연구단) ;
  • 박석주 (한국에너지기술연구원 연료전지 연구단) ;
  • 송락현 (한국에너지기술연구원 연료전지 연구단) ;
  • 신동렬 (한국에너지기술연구원 연료전지 연구단)
  • Published : 2011.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

In order to estimate the possibility of applying electrolytes generally used in solid oxide fuel cells(SOFCs) to direct carbon fuel cells(DCFCs), properties of YSZ(yttria stabilized zirconia) electrolyte were evaluated. In this study, vacuum slurry coating method was adapted to coat thin layer on anode support substrate. After sintering the electrolyte at $1400^{\circ}C$ for 5hrs, microstructure was analyzed by using SEM image. Also, gas permeability and ionic conductivity were measured to find out the potential possibility of electrolyte for DCFCs. The YSZ electrolyte represented dense coating layer and low gas permeability value. The ionic conductivity of YSZ electrolyte was high over $800^{\circ}C$. After measurement of the electrolyte properties, direct carbon fuel cell was fabricated and its performance was measured at $800^{\circ}C$.

본 연구에서는 고체산화물연료전지에서 사용되고 있는 전해질의 직접탄소연료전지로의 적용가능성을 평가하기 위해 YSZ 전해질의 특성을 평가하였다. 전해질 층은 진공 슬러리 코팅 법을 사용하여 연료극 지지체위에 형성하였으며, 코팅 후 $1,400^{\circ}C$에서 5시간 동안 열처리하여 미세조직, 가스투과도 및 이온 전도도 측정을 통해 직접탄소연료전지로의 적용가능성을 확인하였다. YSZ 전해질은 얇고 치밀한 층을 형성하였으며 낮은 가스 투과도 값을 나타내었다. 이와같은 결과를 바탕으로 직접탄소 연료전지에 YSZ 전해질을 적용하였으며, 단위전지를 제작하여 $800^{\circ}C$에서 성능평가를 수행하였다.

Keywords

References

  1. Starz, K. A., Auer, E., Lehmann, T. and Zuber, R., "Characteristics of Platinum-based Electrocatalysts for Mobile PEMFC," J. Power Sources, 84, 167-172(1999). https://doi.org/10.1016/S0378-7753(99)00333-X
  2. Singhal, S. C., "Solid Oxide Fuel Cells for Stationary, Mobile and Military Applications," Solid State Ionics, 152, 405(2002).
  3. Hobson, L. J., Nakano, Y., Ozu, H. and Hayase, S., "Targeting Improved DMFC Performance," J. Power Sources, 104, 79-84(2002). https://doi.org/10.1016/S0378-7753(01)00875-8
  4. Hackett, G. A., Zondlo, J. W. and Svensson, R., "Evaluation of Carbon Materials for Use in Direct Carbon Fuel Cell," J. Power Sources, 168, 111-118(2007). https://doi.org/10.1016/j.jpowsour.2007.02.021
  5. Cherepy, N. J., Kruege, R., Fiet, K. J., Jankowskiand, A. F. and Cooper, J. F., "Direct Conversion of Carbonate Fuels in a Molten Carbonate Fuel Cell," J. Electrochem. Soc., 52, A80-A87(2005).
  6. Muthuvel, M., Jin, X. and Botte, G. G., "Fuel Cells-exploratory Fuel Cells/Direct Carbon Fuel Cells," Encyclopedia Electrochem. Power Sources, 158-171(2009).
  7. Chena, M., Wang, C., Niu, X., Zhao, S., Tang, J. and Zhu, B., "Carbon Anode in Direct Carbon Fuel Cell," Int. J. Hydrogen Energy, 35, 2732-2736(2010). https://doi.org/10.1016/j.ijhydene.2009.04.051
  8. Chen, Y.-Y. and Wei, W.-C. J., "Processing and Characterization of Ultra-thin Yttria-stabilized Zirconia (YSZ) Electrolytic Films for SOFC," Solid State Ionics, 73, 351-357(2006).
  9. Peelen, W., Olivry, M., Au, S., Fehribach, J. and Hemmes, K., "Electrochemical Oxidation of Carbon in a 62/38 mol% Li/K Carbonate Melt," J. Appl. Electrochem., 30, 1389-1395(2000). https://doi.org/10.1023/A:1026586915244
  10. Horita, T., Sakai, N., Kawada, T., Yokokawa, H. and Dokiya, M., "An Investigation of Anodes for Direct-Oxidation of Carbon in Solid Oxide Fuel Cells," J. Electrochem. Soc., 142, 2621-2624 (1995). https://doi.org/10.1149/1.2050064
  11. Cooper, J. F., "Direct Conversion of Coal and Coal-Derived Carbon in Fuel Cells," Second International Conference on Fuel Cell Science, Engineering, and Technology, Rochester, NY, Paper KH-3, 2004.