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Title:
POROUS ELECTRODE BASE MATERIAL AND PROCESS FOR PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO/2011/065349
Kind Code:
A1
Abstract:
Disclosed are: a porous electrode base material which has high sheet strength, can be produced at low cost, and has satisfactory gas permeability and electrical conductivity; and a process for producing the porous electrode base material. The porous electrode base material can be produced by producing a precursor sheet, subjecting the precursor sheet to an intertangling treatment to form a three-dimensionally intertangled structure, impregnating the three-dimensionally intertangled structure with a carbon powder and a fluororesin, and heating the resulting material at a temperature of not lower than 150˚C and lower than 400˚C, wherein the precursor sheet comprises carbon short fibers (A) and at least one type of oxidized fiber precursor short fibers (b) and/or at least one type of fibril oxidized fiber precursor fibers (b') all dispersed in a two-dimensional plane. The porous electrode base material comprises a three-dimensionally intertangled structure in which carbon short fibers (A) dispersed in a three-dimensional structure are joined to one another through oxidized fibers (B) and the carbon short fibers (A) and the oxidized fibers (B) are joined to each other through a carbon powder and a fluororesin.

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Inventors:
SUMIOKA KAZUHIRO (JP)
TATSUNO HIROTO (JP)
Application Number:
PCT/JP2010/070862
Publication Date:
June 03, 2011
Filing Date:
November 24, 2010
Export Citation:
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Assignee:
MITSUBISHI RAYON CO (JP)
SUMIOKA KAZUHIRO (JP)
TATSUNO HIROTO (JP)
International Classes:
H01M4/88; B01J23/42; H01M4/96; H01M8/10
Domestic Patent References:
WO2001056103A12001-08-02
WO2002042534A12002-05-30
Foreign References:
JP2001240477A2001-09-04
JP2005273051A2005-10-06
JP2003183962A2003-07-03
JP2009087616A2009-04-23
JP2006040575A2006-02-09
JP2007273466A2007-10-18
JP2008503043A2008-01-31
Other References:
See also references of EP 2506352A4
Attorney, Agent or Firm:
MIYAZAKI, Teruo et al. (JP)
Akio Miyazaki (JP)
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