| Budget Amount *help |
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2017: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2016: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2015: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
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| Outline of Final Research Achievements |
We have succeeded in the fabrication of all graphene oxide super-capacitors based on graphene oxide electrolyte and reduced graphene oxide electrodes. We have enhanced the device performance by insertion of sulphonic ions into graphene oxide layer to enhance the proton conductivity and by electrochemical treatments to provide pseudo-capacitance. These treatments enhanced capacitance characteristics about 10 times ((1.24 mWhcm-3) in comparison with a conventional graphene oxide supercaoacitor.Besides, we have discovered reversible epoxide opening/closing reactions in GO upon alkaline and acid treatments, respectively, under ambient conditions. We suggest that unique properties of GO including stability of the carbocation and fast proton migration on the surfaces enable the unusual pH-driven epoxide ring opening/closing reactions, which can well-explain high proton conductivities in graphene oxide.
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