| Summary: | 碩士 === 國立中山大學 === 材料與光電科學學系研究所 === 106 === In the rapid development of today''s society, the energy crisis has become one of the inevitable problems so the rise of alternative energy is inevitable. In this thesis, we used amphiphilic block copolymers poly (ethylene oxide) -b- (ε-caprolactone) (PEO-b-PCL) as templates blended with phenolic resin (Resol), after thermal treatment to remove the template, study for the microphase separation(mesophase transformation) by the different weight fraction. According to the equation of energy density E = 1/2CV2 of the supercapacitor, the energy density of the capacitor can be improved by two effective methods: first, to increase the specific capacitance (C) of the electrode material; second, to improve the working voltage (V). In our work, we used KOH activation to increase the gyroid carbon’s and cylinder carbon’s specific surface, after activation cylinder carbon specific surface area from 642.3 m2/g to 1865.3 m2/g and its specific capacitance was 135 F/g under the 6M KOH system with current density of 0.5 A/g. The stable capacitance of 96 F/g was measured after 100 cycles under 1.0 A/g in organic electrolyte system. Gyroid carbon specific surface area from 605.7 m2/g to 1919.7 m2/g and its specific capacitance was 154 F/g under the 6M KOH system with current density of 0.5 A/g. Similarly, the specific capacitance of activated gyroid carbon was obtained 105.4 F/g after 100 cycles of charge-discharge test under organic system.
We successfully used the KOH activation process to increase the regular structure of the carbon material’s specific surface area and the energy density of the mesoporous carbon material, so that we can apply this material to the electrodes of the supercapacitor to improve the energy density.
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