Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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The Influence of Carbonization Temperature and KOH Activation Ratio on the Microporosity of N-doped Activated Carbon Materials and Their Supercapacitive Behaviors

  • Received : 2018.07.31
  • Accepted : 2018.10.01
  • Published : 2018.10.31
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Abstract

A facile method for the preparation of nitrogen-doped microporous carbon via the pyrolysis of poly(vinylidene fluoride) (PVDF) using polypyrrole (PPy) as a selective nitrogen source was developed. A PVDF/PPy-800 sample (carbonized at $800^{\circ}C$) with a 1:0.5 ratio of PVDF and PPy exhibited the highest micropore volume. The activated microporous carbon materials obtained from PVDF/PPy-800 prepared at $800^{\circ}C$ with KOH possessed a large specific surface area and narrow pore-size distribution. They were characterized using $N_2$ adsorption at 77 K and argon (Ar) adsorption at 87 K, which allowed for the characterization of the narrow microporosity of the prepared materials due to the absence of interactions between Ar and the sample surface. In addition, the activated microporous carbon material with a KOH/carbon ratio of 2:1 was found to exhibit the largest specific surface area ($1296m^2g^{-1}$ in $N_2$ at 77 K) and microporosity, and a high specific capacitance ($122.8F\;g^{-1}$).

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References

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