| Budget Amount *help |
¥43,810,000 (Direct Cost: ¥33,700,000、Indirect Cost: ¥10,110,000)
Fiscal Year 2022: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Fiscal Year 2021: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2020: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
Fiscal Year 2019: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
Fiscal Year 2018: ¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000)
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| Outline of Final Research Achievements |
In this study, we aimed to develop a Pt-free redox flow polymer electrolyte fuel cell by using redox mediator for the electrode reaction. Heteropolyacid solutions were selected as positive electrode mediators, and the additive effects of acids and metal ions on the reduction and reoxidation reactions of heteropolyanions were clarified. In the reductive regeneration reaction of redox mediator at the negative electrode, carbon monoxide-containing hydrogen and oxalic acid were employed as fuels, and a carbon-supported rhodium phthalocyanine complex suspended in a solution could be used as a pseudo-homogeneous catalyst. Furthermore, we developed a cell system in which a gas phase between both electrodes prevented the mixing of the anode and the cathode solutions. The operation of this system was demonstrated in combination with the reactions of both electrodes, and the voltage-current relationship in the steady state was obtained.
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