| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Outline of Final Research Achievements |
It is important to clarify the rate-determining step of oxygen mass transport in the porous electrode of polymer electrolyte fuel cells (PEFCs). In this study, elementary steps of oxygen transport were analyzed using a model Pt microelectrode and the limiting current method. In the temperature (30-80 degrees C) and relative humidity (30-80%) ranges tested in this study, the oxygen dissolution rate across the gas/ionomer interface was the rate-determining step. It was shown that an improvement of the oxygen dissolution rate is needed to enable PEFCs to be operated at current densities higher than 2 A/cm2.
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