직접탄소 연료전지에서 고체 탄소 연료에 따른 전기화학 임피던스 비교 연구

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 25; no. 6; pp. 620 - 628
• Main Authors: 조재민(Jaemin Cho), 엄성용(Seongyong Eom), 이광섭(Gwangseob Lee), 안성율(Seongyool Ahn), 김덕줄(Duckjool Kim), 최경민(Gyungmin Choi)
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 2014
• Subjects: 기계공학; Direct Carbon Fuel Cell; Electrochemical Impedance Spectroscopy; 전기화학 반응; Electrochemical Reaction; 전기화학 임피던스 분광법; 직접탄소 연료전지; 등가회로; Constant Phase Element; Equivalent Circuit
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/KHNES.2014.25.6.620

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.