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학술지 Graphene-based Carbons as Supercapacitor Electrodes with Bicontinuous, Porous Polyacrylonitrile
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저자
김빛나, 양용석, 유인규
발행일
201706
출처
Japanese Journal of Applied Physics, v.56, pp.1-6
ISSN
0021-4922
출판사
Japan Society of Applied Physics (JSAP), Institute of Physics (IOP)
DOI
https://dx.doi.org/10.7567/JJAP.56.075103
초록
In this study, we fabricated a bicontinuous carbon structure (BCS) with high porosity and a loosely connected framework structure. The role of the BCS is to support a concrete supercapacitor active electrode structure. Poly(acrylonitrile) was used as a precursor for the BCS material, which was a porous polymer monolith carbonized by heat treatment (at 1100 °C). The BCS was prepared by mixing with an active material, graphene or an activated carbon. The mixed materials were used as an electrode material in a supercapacitor. The BCS13 + AC sample (~107.5 F/g) showed a higher specific capacitance than the commercial activated carbon cell (~76 F/g). The BCS13 + graphene sample (~75 F/g) also exhibited a higher specific capacitance than the graphene cell (~49 F/g). This BCS monolith had many macro- and micropores in its structure, enabling fast electrolyte ion movement and excellent electrochemical performance with a low equivalent series resistance (ESR).
KSP 제안 키워드
Activated carbon(AC), Active electrode, Active materials, Carbon structure, Commercial activated carbon, Electrode structure, Electrolyte ion, Equivalent Series Resistance(ESR), Framework structure, High porosity, Ion movement