Characterization of graphene-based supercapacitors fabricated on Al foils using Au or Pd thin films as interlayers

Kahoe Ku, Byungwoo Kim, Haegeun Chung, Woong Kim

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We demonstrate that an Au or Pd interlayer between graphene and an Al-foil current collector plays an important role in enhancing supercapacitor performance. Graphene was prepared by scalable chemical exfoliation and mild thermal reduction (∼150 °C) processes. Working electrodes were prepared by coating the graphene on Au/Al or Pd/Al by drop-dry method. The graphene deposited on the noble metals Au and Pd demonstrated excellent supercapacitor performance. Estimated specific energy and specific power of supercapacitors were ∼40 Wh/kg and ∼40 kW/kg at the current density of ∼33 A/g, when operated in organic solution. Altogether, we demonstrate that employing noble metals in the fabrication of graphene-based supercapacitors can lead to excellent performance, and this could be a critical basis for further development of graphene-based supercapacitors.

Original languageEnglish
Pages (from-to)2613-2617
Number of pages5
JournalSynthetic Metals
Volume160
Issue number23-24
DOIs
Publication statusPublished - 2010 Dec 1

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Keywords

  • Current collector
  • Gold
  • Graphene
  • Interface
  • Palladium
  • Supercapacitor

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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