| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
Direct methanol alkaline fuel cells (DMAFC) can pave the way for the use of non-noble catalysts, such as silver and nickel. The high methanol crossover rate have resulted in fuel loss and reduced cell voltage. In this work, we attempted to prepare the polymer electrolyte membrane (PEM), the ionomer and the binder from the block copolymer consisting of poly(vinylalcohol) (PVA) and anion exchange chains, due to the excellent methanol barrier properties of PVA matrix.
A test cell for DMFCs constructed using the PVA-based PEMs delivered 69.0 mW/cm2 of maximum power density (Pmax) at 10wt% methanol solution. Pmax and methanol flux during DMFC operations are also higher performances than that of other commercially available membranes in high concentration methanol fuel. Electrodes using PVA-based ionomer also indicate high methanol barrier properties than that using Nafion ionomer.
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