Surface structure and electrochemical characteristics of graphite fluorinated by elemental fluorine and plasma treatment using CF4

Tsuyoshi Nakajima, Vinay Gupta, Yoshimi Ohzawa, Hiroyuki Iwata, Alain Tressaud, Etine Durand

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations

Abstract

Surface modification of graphite powder has been performed by elemental fluorine and radiofrequency plasma fluorination. Both of the methods enlarge the surface areas of graphite samples and change their pore volume distribution. Surface-fluorinated graphite samples demonstrate the capacities higher than those of original samples and even the theoretical capacity of graphite, 372 mAhg-1 without reducing the first coulombic efficiencies. The increments of the capacities are ∼5, ∼10 and ∼15% for graphite samples with average particle diameters of 7, 25 and 40 μm, respectively.

Original languageBritish English
Pages (from-to)[517]/103-[522]/108
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume388
Issue numberPART 3
DOIs
StatePublished - 2002
EventProceedings of the First International Symposium on Nanocarbons - Nagano, Japan
Duration: 14 Nov 200116 Nov 2001

Keywords

  • Graphite electrode
  • Lithium ion battery
  • Surface fluorination
  • Surface structure

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