Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Comparative Study on Electrochemical Impedance Analysis of Solid Carbon Fuels in Direct Carbon Fuel Cell

직접탄소 연료전지에서 고체 탄소 연료에 따른 전기화학 임피던스 비교 연구

  • 조재민 (부산대학교 기계공학부 대학원) ;
  • 엄성용 (부산대학교 기계공학부 대학원) ;
  • 이광섭 (부산대학교 기계공학부 대학원) ;
  • 안성율 (일본 전력중앙연구소) ;
  • 김덕줄 (부산대학교 기계공학부) ;
  • 최경민 (부산대학교 기계공학부)
  • Received : 2014.11.19
  • Accepted : 2014.12.31
  • Published : 2014.12.30
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Abstract

Direct Carbon Fuel Cell(DCFC) is one of new power generation that the chemical energy of solid carbon can be converted into electrical energy directly. At the high temperature, the electrochemical reaction of the carbon takes place and the carbon reacts with oxygen to produce carbon dioxide as followed overall reaction ($C+O_2{\rightarrow}CO_2$). However, in case of using the raw coals as a fuel of DCFC, the volatile matter containing carbon, hydrogen, and oxygen produces at operating temperature. In this study, the electrochemical reaction of Adaro coal was compared with Graphite. This work focused on the electrochemical reaction of two kinds of solid carbon by Electrochemical Impedance Spectroscopy(EIS). The EIS results were estimated by equivalent circuit analysis. The constant phase element(CPE) was applied in Randle circuit to explain an electrode and fuel interface. The correlation between the fuel characteristic and electrochemical results was discussed by elements of equivalent circuit of each fuel.

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References

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