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Graphene-based Carbons as Supercapacitor Electrodes with Bicontinuous, Porous Polyacrylonitrile
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- Authors
- Bit-Na Kim, Young Suk Yang, In-Kyu You
- Issue Date
- 2017-06
- Citation
- Japanese Journal of Applied Physics, v.56, pp.1-6
- ISSN
- 0021-4922
- Publisher
- Japan Society of Applied Physics (JSAP), Institute of Physics (IOP)
- Language
- English
- Type
- Journal Article
- Abstract
- 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 Keywords
- 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