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Multi‑dimensional nanocarbons hybridized with silicon oxides and their application for electrochemical capacitors

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2019, 29(2), pp.123-131
  • DOI : 10.1007/s42823-019-00005-3
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : January 5, 2018
  • Accepted : January 30, 2019
  • Published : April 1, 2019

Seung Hyun Song 1 PARK, JI SUN 2 Song Jun Ho 2 Churl Seung Lee 2 Joonho Bae 1

1가천대학교
2전자부품연구원

Accredited

ABSTRACT

We report a facile and versatile strategy to prepare multi-dimensional nanocarbons hybridized with mesoporous SiO2. Carbon nanoplatelets (CNPs, two-dimensional structure of nanocarbons) were combined with carbon nanotubes (CNTs, onedimensional nanocarbons) to form multi-dimensional carbons (2D–1D, CNP–CNTs). The CNP–CNTs were synthesized by directly growing CNTs on CNPs. A simple solution-based process using TEOS (tetraethyl orthosilicate) resulted in coating or hybridizing CNP–CNTs with mesoporous silica to produce CNP–CNTs@SiO2. The nanocarbons’ surface area significantly increased as the amount of TEOS increased. Electrochemical characterizations of CNP–CNTs@SiO2 as supercapactior electrodes including cyclic voltammetry and galvanostatic charge–discharge in 3 M KOH (aq) reveal excellent-specific capacitance of 23.84 mF cm−2 at 20 mV s−1, stable charge–discharge operation, and low internal resistance. Our work demonstrates mesoporous SiO2 on nanocarbons have great potential in electrochemical energy storage.

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