A graphite foil electrode covered with electrochemically exfoliated graphene nanosheets

Seung Hun Lee, Seung Deok Seo, Yun Ho Jin, Hyun Woo Shim, Dong Wan Kim

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

We demonstrate a highly efficient and large area synthesis of 2-D graphene nanosheets on the surface of flexible graphite foils by electrochemical exfoliation of graphite in an effective electrolyte, poly(sodium-4- styrenesulfonate) solution. A constant current of 150 mA/cm was applied to the vertically aligned graphite (anode) and copper (cathode) sheet in the PSS electrolyte solution during a preset time for electrolytic surface exfoliation of the graphite sheet; uniform expansion of the graphite foil was observed. This expanded foil was characterized using scanning electron microscopy, confocal laser scanning microscopy, and high-resolution transmission electron microscopy. Furthermore, we demonstrate the ability of this high surface area foil, covered with uniform graphene, to enable improved electrolyte permeability and Li ion transfer, thereby enhancing electrochemical performance of Li ion battery electrodes.

Original languageEnglish
Pages (from-to)1419-1422
Number of pages4
JournalElectrochemistry Communications
Volume12
Issue number10
DOIs
Publication statusPublished - 2010 Oct

Keywords

  • Electrochemical exfoliation
  • Graphene nanosheets
  • Graphite foil
  • Li ion batteries

ASJC Scopus subject areas

  • Electrochemistry

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