운전 조건에 따른 고분자 전해질형 연료전지의 전지 성능 = Cell Performances of Proton Exchange Membrane Fuel Cell as to Operation Conditions

다국어 초록 (Multilingual Abstract)

The performance of proton exchange membrane fuel cell was investigated to optimize the fabrication method of membrane/electrode assembly, and to find appropriate operating conditions such as pressure, temperature and inlet gas humidification. It is the membrane electrolyte that has decisive effect on the cell performance. The optimum condition for humidification could be found by varying the inlet gas temperatures. Gas temperature 5℃ for oxygen and l0℃ for hydrogen higher than that of cell temperature was found to the optimum humidification condition irrespective of the cell temperature. Increase in temperature and/or pressure generally resulted in enhanced cell performance. The cell performance operated at 1 atm, however, exhibited an interesting temperature dependence. Enhanced performance with increasing temperature was observed up to 70℃, whereas cell temperature showed no appreciable effect on the cell performance above 70℃. This observation might be attributed to the increased vapor pressure, with increasing temperature, which dilutes inlet gas composition. Cells operated at higher pressure did not show this behavior where the effect of increased vapor pressure becomes relatively insignificant.