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연료전지의 Pt / C 전극 제조 조건이 전극 성능에 미치는 영향
노용우,오기한,김진수,설용건,이태희 ( Yong Woo Rho,Ki Han Augh,Jin Soo Kim,Yong Gun Shul,Tae Hee Lee ) 한국화학공학회 1991 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.29 No.2
Effects of sintering atmosphere, average particle size and loading density of Pt and preparation method of Pt/C catalyst on the performance of porous carbon electrode were examined in a half cell of 20wt% sulfuric acid electrolyte. From the XRD data, the average Pt particle size prepared by the colloidal method was confirmed to be less than 30Å. From the TEM data, it was confirmed that the average Pt particle sizes sintered under H₂ and N₂ atmosphere were maintained at 30Å and 40Å respectively but it grew to 120Å under O₂ atmosphere sintering. For the average Pt particle size of 30Å, 40Å and 120Å, the corresponding performance of the electrode was shown to be 260, 230 and 110㎃/cm2 respectively at 700㎷. As the Pt loading was increased to 5, 10 and 20 wt%, the corresponding performance of the electrode was improved to 150, 230 and 270㎃/㎠ at 700㎷.
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운전 조건에 따른 고분자 전해질형 연료전지의 전지 성능
노용우,조원일,고영태,이진홍,목영일 ( Yong Woo Rho,Won Ihl Cho,Young Tai Kho,Jih Hong Lee,Young Il Mok ) 한국화학공학회 1995 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.33 No.2
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.
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