Superior capacitance of functionalized graphene

Ziyin Lin, Yan Liu, Yagang Yao, Owen J. Hildreth, Zhuo Li, Kyoungsik Moon, Ching Ping Wong

Research output: Contribution to journalArticle

254 Scopus citations

Abstract

We report the superior capacitance of functionalized graphene prepared by controlled reduction of graphene oxide (GO). In a solvothermal method, GO dispersed in dimethylformamide (DMF) was thermally treated at a moderate temperature (150 °C), which allows a fine control of the density of functionalities. Surface functionalities on graphene would enable a high pseudocapacitance, good wetting property, and acceptable electric conductivity. A specific capacitance up to 276 F/g was achieved based on functionalized graphene at a discharge current of 0.1 A/g in a 1 M H2SO4 electrolyte, which is much higher than the benchmark material. The excellent performance of the functionalized graphene signifies the importance of controlling the surface chemistry of graphene-based materials.

Original languageEnglish (US)
Pages (from-to)7120-7125
Number of pages6
JournalJournal of Physical Chemistry C
Volume115
Issue number14
DOIs
StatePublished - Apr 14 2011

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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    Lin, Z., Liu, Y., Yao, Y., Hildreth, O. J., Li, Z., Moon, K., & Wong, C. P. (2011). Superior capacitance of functionalized graphene. Journal of Physical Chemistry C, 115(14), 7120-7125. https://doi.org/10.1021/jp2007073