Nanoclay assisted electrochemical exfoliation of pencil core to high conductive graphene thin-film electrode

Kunfeng Chen, Dongfeng Xue, Sridhar Komarneni

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Nanoclay assisted electrochemical exfoliation was developed to in-situ form functionalized graphene electrode materials from pencil core with different ratios of graphite and clay. This method made a positive transformation from solid graphite to graphene colloidal solution, which can be used to construct binder- and additive-free thin-film electrodes. Exfoliated graphene can be served as both conductive current collector (film resistance of 33 Ω/square) and electrode materials. Graphene thin-film electrodes from pencil cores displayed higher capacity of 224 than 80 mA h/g of that from pure graphite. The electrochemical performance can be controlled by the ratio of graphite and clay and the oxidation reaction of surface oxygen functional groups. The described nanoclay-assisted electrochemical oxidation route shows great potential for the synthesis of functionalized graphene electrode materials for high-conductive thin-film lithium ion batteries and supercapacitors.

Original languageEnglish (US)
Pages (from-to)156-161
Number of pages6
JournalJournal of Colloid And Interface Science
Volume487
DOIs
StatePublished - Feb 1 2017

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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