Ultrathin planar graphene supercapacitors

Jung Joon Yoo, Kaushik Balakrishnan, Jingsong Huang, Vincent Meunier, Bobby G. Sumpter, Anchal Srivastava, Michelle Conway, Arava Leela Mohana Reddy, Jin Yu, Robert Vajtai, Pulickel M. Ajayan

Research output: Contribution to journalArticlepeer-review

956 Scopus citations

Abstract

With the advent of atomically thin and flat layers of conducting materials such as graphene, new designs for thin film energy storage devices with good performance have become possible. Here, we report an "in-plane" fabrication approach for ultrathin supercapacitors based on electrodes comprised of pristine graphene and multilayer reduced graphene oxide. The in-plane design is straightforward to implement and exploits efficiently the surface of each graphene layer for energy storage. The open architecture and the effect of graphene edges enable even the thinnest of devices, made from as grown 1-2 graphene layers, to reach specific capacities up to 80 μFcm-2, while much higher (394 μFcm-2) specific capacities are observed multilayer reduced graphene oxide electrodes. The performances of devices with pristine as well as thicker graphene-based structures are examined using a combination of experiments and model calculations. The demonstrated all solid-state supercapacitors provide a prototype for a broad range of thin-film based energy storage devices.

Original languageEnglish (US)
Pages (from-to)1423-1427
Number of pages5
JournalNano Letters
Volume11
Issue number4
DOIs
StatePublished - Apr 13 2011
Externally publishedYes

Keywords

  • Graphene
  • in-plane geometry
  • multilayer graphene
  • single-layer grapheme
  • supercapacitor

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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