Title:
CARBONACEOUS MATERIAL, PROCESS FOR PRODUCING CARBONACEOUS MATERIAL, PROCESS FOR PRODUCING FLAKED GRAPHITE, AND FLAKED GRAPHITE
Document Type and Number:
WIPO Patent Application WO/2012/073861
Kind Code:
A1
Abstract:
Provided are a carbonaceous material reduced in unevenness in the state in which the graphene sheets face each other and a process for producing the carbonaceous material. Also provided are: a process for flaked-graphite production which enables more thinly flaked graphite to be easily mass-produced; and the flaked graphite.
The carbonaceous material comprises a stack of graphene sheets and a substance intercalated between the graphene sheets, and is expanded graphite that gives an XRD pattern which has diffraction peaks respectively in the 2θ ranges of 7-12º and 18-24º and in which a diffraction peak appearing in the range of 25-27º has a lower height than the diffraction peak appearing in the range of 18-24º, the peak which appears in the 2θ range of 7-12º having a half-value width of 4º or less. The process for carbonaceous-material production comprises immersing at least some of sheet-shaped graphite or sheet-shaped expanded graphite in an aqueous electrolyte solution to electrochemically treat the graphite. The process for flaked-graphite production comprises a step in which exfoliation force is applied to the carbonaceous material to thereby obtain flaked graphite. The flaked graphite is obtained by this process.
Inventors:
WADA TAKUYA (JP)
TOYODA MASAHIRO (JP)
TOYODA MASAHIRO (JP)
Application Number:
PCT/JP2011/077321
Publication Date:
June 07, 2012
Filing Date:
November 28, 2011
Export Citation:
Assignee:
SEKISUI CHEMICAL CO LTD (JP)
OITA UNIVERSITY (JP)
WADA TAKUYA (JP)
TOYODA MASAHIRO (JP)
OITA UNIVERSITY (JP)
WADA TAKUYA (JP)
TOYODA MASAHIRO (JP)
International Classes:
C01B31/04
Foreign References:
| JP2010258246A | 2010-11-11 | |||
| JP2009143761A | 2009-07-02 |
Other References:
GUOXIU WANG ET AL.: "Facile Synthesis and Characterization of Graphene Nanosheets", J. PHYS. CHEM. C, vol. 112, 2008, pages 8192 - 8195, XP055068372
T. NAKAJIMA ET AL.: "A new structure model of graphite oxide", CARBON, vol. 26, no. ISSUE, 1988, pages 357 - 361, XP022781220
ABE TAKESHI: "Synthesis of graphite intercalation compounds by a soft process", TANSO, 2006, pages 244 - 248, XP055068380
JOSEPH H. WANDASS ET AL.: "X-Ray Photoelectron and Scanning Auger Electron Spectroscopic Studies of Oxidized Graphite Electrode Surfaces", J. ELECTROCHEM. SOC., vol. 134, no. 11, 1987, pages 2734 - 2739, XP055068386
Y. OHASHI; T. KOIZUMI ET AL., TANSO, vol. 180, 1997, pages 235 - 238
See also references of EP 2647600A4
T. NAKAJIMA ET AL.: "A new structure model of graphite oxide", CARBON, vol. 26, no. ISSUE, 1988, pages 357 - 361, XP022781220
ABE TAKESHI: "Synthesis of graphite intercalation compounds by a soft process", TANSO, 2006, pages 244 - 248, XP055068380
JOSEPH H. WANDASS ET AL.: "X-Ray Photoelectron and Scanning Auger Electron Spectroscopic Studies of Oxidized Graphite Electrode Surfaces", J. ELECTROCHEM. SOC., vol. 134, no. 11, 1987, pages 2734 - 2739, XP055068386
Y. OHASHI; T. KOIZUMI ET AL., TANSO, vol. 180, 1997, pages 235 - 238
See also references of EP 2647600A4
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
Patent business corporation Miyazaki and table-of-contents patent firm (JP)
Patent business corporation Miyazaki and table-of-contents patent firm (JP)
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Claims: