Electrochemical characteristics of discrete, uniform, and monodispersed hollow mesoporous carbon spheres in double-layered supercapacitors

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

18 Scopus Citations
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Author(s)

  • Xuecheng Chen
  • Krzysztof Kierzek
  • Karolina Wenelska
  • Krzystof Cendrowski
  • Jiang Gong
  • Xin Wen
  • Tao Tang
  • Ewa Mijowska

Detail(s)

Original languageEnglish
Pages (from-to)2627-2633
Journal / PublicationChemistry - An Asian Journal
Volume8
Issue number11
Online published8 Aug 2013
Publication statusPublished - Nov 2013

Abstract

Core-shell-structured mesoporous silica spheres were prepared by using n-octadecyltrimethoxysilane (C18TMS) as the surfactant. Hollow mesoporous carbon spheres with controllable diameters were fabricated from core-shell-structured mesoporous silica sphere templates by chemical vapor deposition (CVD). By controlling the thickness of the silica shell, hollow carbon spheres (HCSs) with different diameters can be obtained. The use of ethylene as the carbon precursor in the CVD process produces the materials in a single step without the need to remove the surfactant. The mechanism of formation and the role played by the surfactant, C18TMS, are investigated. The materials have large potential in double-layer supercapacitors, and their electrochemical properties were determined. HCSs with thicker mesoporous shells possess a larger surface area, which in turn increases their electrochemical capacitance. The samples prepared at a lower temperature also exhibit increased capacitance as a result of the Brunauer-Emmett-Teller (BET) area and larger pore size. I'm so hollow: Hollow mesoporous carbon spheres with controllable diameters are fabricated by chemical vapor deposition and used as electrode materials in supercapacitors. The performance of hollow carbon spheres with a wall thickness of 25 nm synthesized at 700 °C is the best, as manifested by their highest specific capacitance in a wide range of charging-discharging rates. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Research Area(s)

  • chemical vapor deposition, mesoporous materials, nanostructures, silica, supercapacitors

Citation Format(s)

Electrochemical characteristics of discrete, uniform, and monodispersed hollow mesoporous carbon spheres in double-layered supercapacitors. / Chen, Xuecheng; Kierzek, Krzysztof; Wenelska, Karolina; Cendrowski, Krzystof; Gong, Jiang; Wen, Xin; Tang, Tao; Chu, Paul K.; Mijowska, Ewa.

In: Chemistry - An Asian Journal, Vol. 8, No. 11, 11.2013, p. 2627-2633.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review