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.

Multi-dimensional nanocarbons hybridized with silicon oxides and their application for electrochemical capacitors
    Abstract
    1 Introduction
    2 Experimental
        2.1 Preparation of CNP–CNTs
        2.2 Hybridization of CNP–CNTs with mesoporous SiO2
        2.3 Materials characterization
        2.4 Electrochemical measurements
    3 Results and discussion
    4 Conclusions
    Acknowledgements 
    References

• Seung Hyun Song(Department of Nano‑physics, Gachon University)
• Ji Sun Park(Energy Nano Materials Research Center, Korea Electronics Technology Institute (KETI))
• Jun Ho Song(Energy Nano Materials Research Center, Korea Electronics Technology Institute (KETI))
• Churl Seung Lee(Energy Nano Materials Research Center, Korea Electronics Technology Institute (KETI))
• Joonho Bae(Department of Nano‑physics, Gachon University)