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 language | English |
|---|---|
| Pages (from-to) | 2613-2617 |
| Number of pages | 5 |
| Journal | Synthetic Metals |
| Volume | 160 |
| Issue number | 23-24 |
| DOIs | |
| Publication status | Published - 2010 Dec |
Bibliographical note
Funding Information:This work was supported by the Korea Research Council of Fundamental Science & Technology (KRCF) and Korea Institute of Science & Technology (KIST) for “National Agenda Project” program, and by the Pioneer Research Center Program through the National Research Foundation of Korea (No. 2010-0002191 ).
Keywords
- Current collector
- Gold
- Graphene
- Interface
- Palladium
- Supercapacitor
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry