Nanostructured graphite-hydrogen systems prepared by mechanical milling method

Shin Ichi Orimo, Tomoyoshi Matsushima, Hironobu Fujii, Toshiharu Fukunaga, Gũnter Majer, Andreas Zũttel, Louis Schlapbach

Research output: Contribution to journalConference article

5 Citations (Scopus)

Abstract

Nanostructured graphite was prepared by mechanical milling under a hydrogen atmosphere. Several samples obtained after different milling times were systematically examined to get fundamental information about the structures, hydrogen concentrations, and also hydrogen desorption properties. The hydrogen concentration reaches up to 7.4 mass% (CH0.95) after milling for 80 h, and two desorption peaks of hydrogen molecule (mass-number = 2), starting at about 600 K and 950 K respectively, are observed in thermal desorption mass-spectroscopy in the sample. Below the temperature of the second desorption peak, at which recrystallization related desorption occurs, the nanostructured graphite is expected to retain its specific defective structures mainly with carbon dangling bonds as suitable trapping sites for hydrogen storage.

Original languageEnglish
Pages (from-to)173-178
Number of pages6
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume386
Issue numberPART 1
DOIs
Publication statusPublished - 2002 Jan 1
Externally publishedYes
EventProceedings of the First International Symposium on Nanocarbons - Nagano, Japan
Duration: 2001 Nov 142001 Nov 16

Keywords

  • Defective structures
  • Hydrogen storage
  • Mechanical milling
  • Nanostructured graphite
  • Recrystallization

ASJC Scopus subject areas

  • Condensed Matter Physics

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