| Budget Amount *help |
¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2017: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
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| Outline of Final Research Achievements |
Nitrogen-doped vertically aligned multi-walled carbon nanotubes (Nx-VAMWCNTs) and defluorinated VAMWCNTs (deFx-VAMWCNTs) were prepared from fluorinated VAMWCNTs. N500-VAMWCNTs and deF500-VAMWCNTs were modified with doped nitrogen atoms and a small amount of fluorine groups without destroying the alignment structure of the nanotubes.
The specific capacitance of the N500-VAMWCNT electrodes was 12.0 F/g at a scan rate of 100 mV/s, which is approximately 1.8 times the value obtained for the as-grown VAMWCNT electrodes. Based on the order of self-potential of each sample in three-electrode cell system, combined cells were assembled with the deF550- and N500-VAMWCNTs as positive and negative electrodes, respectively. As a result, the open circuit voltage of combined cells exhibited +0.16 V, and their cell voltage and energy density were larger than those of normal cells (N500-VAMWCNT electrodes) when each cell was provided with equivalent electric charges per unit mass of the electrode.
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