Flexible holey graphene paper electrodes with enhanced rate capability for energy storage applications

Xin Zhao, Cary M. Hayner, Mayfair C. Kung, Harold H. Kung

Research output: Contribution to journalArticle

386 Citations (Scopus)

Abstract

The unique combination of high surface area, high electrical conductivity and robust mechanical integrity has attracted great interest in the use of graphene sheets for future electronics applications. Their potential applications for high-power energy storage devices, however, are restricted by the accessible volume, which may be only a fraction of the physical volume, a consequence of the compact geometry of the stack and the ion mobility. Here we demonstrated that remarkably enhanced power delivery can be realized in graphene papers for the use in Li-ion batteries by controlled generation of in-plane porosity via a mechanical cavitation-chemical oxidation approach. These flexible, holey graphene papers, created via facile microscopic engineering, possess abundant ion binding sites, enhanced ion diffusion kinetics, and excellent high-rate lithium-ion storage capabilities, and are suitable for high-performance energy storage devices.

Original languageEnglish
Pages (from-to)8739-8749
Number of pages11
JournalACS nano
Volume5
Issue number11
DOIs
Publication statusPublished - Nov 22 2011

Keywords

  • Li-ion battery
  • defects
  • electrode
  • graphene
  • holey

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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