| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
In this study, the effects of dopant composition and melting temperature on glass structure and protonic conductivity for 30 mol%MO-70 mol%P2O5 (M = Ba, Zn) glasses. Mobile proton concentration increased by a decrease in the melting temperature from 1000℃ to 800℃ due to the increase in remained water in the glasses. The phosphate glass structure was changed from the branched structure to straight chain by substituting Ba with Zn, which improved the proton mobility. The proton conductivity reached to 1×10-3 S/cm at 250℃ for the 30ZnO-70P2O5 glass melted at 800℃. The power density of 1.2 mW/cm2 was obtained for the fuel cell, whose electrolyte was formed directly on the Pt/C electrodes. The power density for the cells made by the new method was 6 times larger than that for the previous cells.
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