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    CARBONACEOUS ELECTRODE
    21.
    发明专利
    CARBONACEOUS ELECTRODE 失效

    公开(公告)号：JPH02133593A

    公开(公告)日：1990-05-22

    申请号：JP28398588

    申请日：1988-11-11

    Applicant: MITSUI SHIPBUILDING ENG ,  TORAY INDUSTRIES

    Inventor： HAMAMOTO OSAMU ,  MIWA KISHIO ,  INOUE MIKIO

    IPC: C25B11/12

    Abstract: PURPOSE:To maintain satisfactory reactivity of an electrode and to reduce background electric current by using an aggregate of carbon fibers or a porous carbon body as the base of the electrode and specifying the quantitative relation among carbon, a metal and the constituent elements of the oxide and carbide of the metal on the surface of the base. CONSTITUTION:This carbonaceous electrode is based on an aggregate of carbon fibers or a porous carbon block and has carbon, a metal M, the oxide and carbide of the metal M present in combination on the surface of the base. In this electrode, the ratio (O/C) of the number of bonded oxygen atoms calculated from O1s spectrum observed by ESCA surface analysis to the number of carbon atoms calculated from C1s spectrum is regulated to 0.01-0.2 and the ratio (M/C) of the number of bonded atoms of the metal M (M is Ti, Zr, V, Nb, Ta, Cr, Mo, W or Fe) calculated from M3d spectrum to the number of carbon atoms calculated from C1s spectrum is regulated to >=0.005. By this chemical modification, the sensitivity of detection in electrochemical analysis is enhanced.

    GAS DIFFUSER AND MANUFACTURING METHOD THEREFOR
    22.
    发明专利
    GAS DIFFUSER AND MANUFACTURING METHOD THEREFOR 失效

    公开(公告)号：JP2002352807A

    公开(公告)日：2002-12-06

    申请号：JP2001162022

    申请日：2001-05-30

    Applicant: TORAY INDUSTRIES

    Inventor： SENDA TAKASHI ,  INOUE MIKIO ,  INOGAKURA SHUICHI

    IPC: H01M4/88 ,  H01M4/96 ,  H01M8/02 ,  H01M8/10

    Abstract: PROBLEM TO BE SOLVED: To provide a gas diffuser which is flexible and comprises excellent mechanical characteristics such as high tensile strength and anti-compression characteristics. SOLUTION: A gas diffuser 4 is provided where a porous carbon base material 1 which is a collection of a plurality of carbon fibers 1a contains granular fluorocarbon resin 2 by 1-40 wt.% while the granular fluorocarbon resin binds carbon fibers together as a binder. The gas diffuser 4 is acquired by a method for manufacturing a gas diffuser which includes at least following processes (1), (2) and (3): a process (1) where the porous carbon base material is dipped in the dispersion liquid having granular fluorocarbon resin by 1-60 wt.%, a process (2) where a superfluous dispersion liquid is removed from the base material acquired through the process (1), and is dried to adjust a dried granular fluorocarbon resin into a range of 1-40 wt.% relative to the entire base material, and a process (3) where the base material provided through the process (2) is hot-pressed within the surface pressure range 1 Pa-10 MPa by batch press, otherwise a process where it is hot-pressed, by roll press, with a line pressure of 1-5000 N/cm, by a clearance of 30-90% of the thickness of base material before pressing.

    CARBON FIBER PAPER AND POROUS CARBON BOARD
    23.
    发明专利
    CARBON FIBER PAPER AND POROUS CARBON BOARD 失效

    公开(公告)号：JPH09324390A

    公开(公告)日：1997-12-16

    申请号：JP14553796

    申请日：1996-06-07

    Applicant: TORAY INDUSTRIES

    Inventor： INOUE MIKIO

    IPC: C04B38/00 ,  C04B35/83 ,  C25B11/12 ,  D01F9/22 ,  D21H13/50 ,  H01M4/96

    Abstract: PROBLEM TO BE SOLVED: To obtain a porous carbon board capable of keeping mechanical strength thereof and changing the diameter of pores without depending on the change in density thereof, high in electroconductivity and heat conductivity in depth direction thereof. SOLUTION: This carbon paper contains two or more kinds of carbon short fibers of different thickness consisting of at least carbon short fibers having 4-9μm and >=4mm length, in which the ratio (D2/D1) of the diameter of the thinnest carbon short fiber (D1) to the diameter of the thickest carbon short fiber (D2) is >=1.3. This porous carbon board contains two or more kinds of carbon short fibers of different thicknesses containing at least carbon short fibers having 4-9μm and >=4mm length, and has 300-850kg/m density ρ. Bending strength F [MPa] and specific resistance in depth direction R [Ωm] thereof satisfies the relationship (1) and (2). (1) F>=ρ/27, (2) R .

    POROUS, ELECTRICALLY CONDUCTIVE SHEET AND METHOD FOR PRODUCTION THEREOF
    26.
    发明公开
    POROUS, ELECTRICALLY CONDUCTIVE SHEET AND METHOD FOR PRODUCTION THEREOF 审中-公开
    多孔，导电片材和方法及其

    公开(公告)号：EP1139471A4

    公开(公告)日：2002-09-04

    申请号：EP00961082

    申请日：2000-09-19

    Applicant: TORAY INDUSTRIES

    Inventor： INOUE MIKIO ,  NAKAE TAKEJI

    IPC: D21H13/50 ,  H01B1/24 ,  H01M4/96 ,  C25B11/03 ,  D06M15/19 ,  D21H19/10

    CPC classification number: H01B1/24 ,  D21H13/50 ,  H01M4/96

    Abstract: A porous, electrically conductive sheet, which (a) comprises a sheet formed with a number of carbon fibers having an organic substance adhered thereto, (b) has an electrical resistance in the direction of thickness of 50 m OMEGA cm or less, (c) has a maximum diameter for causing fracture of 25 mm or less, and (d) has a compression ratio (the ratio of a thickness of a compressed sheet to that of an original sheet) of 40 % or less. The porous, electrically conductive sheet can be produced by a method comprising (a) a sheet-forming step of scooping a number of carbon fibers being dispersed in a liquid up onto a net to thereby form a carbon fiber sheet, (b) an organic substance adhesion step of rendering an organic substance to adhere to the formed carbon fiber sheet as a binder for carbon fibers, (c) a drying step of drying the sheet having the organic substance adhered thereto, and (d) a pressing step of pressing the dried sheet with a face pressure of 0.49 to 9.8 Mpa and/or of subjecting the sheet to a roll pressing with a clearance of 300 mu ñm or less.

    CARBON FIBER PAPER FOR SOLID POLYMER FUEL CELLS
    27.
    发明公开
    CARBON FIBER PAPER FOR SOLID POLYMER FUEL CELLS 失效
    碳纤维纸固体高分子型燃料电池

    公开(公告)号：EP1009048A4

    公开(公告)日：2002-09-04

    申请号：EP98921838

    申请日：1998-05-27

    Applicant: TORAY INDUSTRIES

    Inventor： INOUE MIKIO

    IPC: D21H13/50 ,  H01M4/96 ,  H01M8/02 ,  H01M8/10

    CPC classification number: H01M8/1004 ,  D21H13/50 ,  H01M4/96 ,  H01M8/0234 ,  H01M8/1007 ,  H01M2300/0082

    Abstract: A carbon fiber paper usable as a current collector for solid polymer fuel cells, which is out of danger of short-circuiting with a counter electrode, is not destroyed even by pressurizing, exhibits a relatively low resistance, and is inexpensive. Specifically, a carbon fiber paper for solid polymer fuel cells which is used in the cell in a state wherein the short carbon fibers of the paper are bound with a polymeric substance and which is characterized in that at least 95 % of the short carbon fibers excepting those having lengths of (Y + 0.1) mm or below satisfy the relationship: W≥5X, wherein X is the thickness (mm) of the paper, Y is the thickness (mm) thereof under pressurizing at 2.9 MPa, and W is the length (mm) of each short carbon fiber. It is preferable that the short carbon fibers satisfy also the relationship: Z≥5X, wherein Z is the average length (mm) of the short fibers. The carbon fiber paper exhibits a weight loss of 3 % or below as determined by applying a uniform surface pressure of 2.9 MPa in the thicknesswise direction for 2 minutes and releasing the surface pressure, and the short carbon fibers contained in the carbon fiber paper satisfy the following relationship: σ/(E D)≥0.5 10-3, wherein D is the diameter (νm) of the short carbon fibers, σ is the tensile strength (MPa) thereof, and E is the tensile modulus (MPa) thereof.

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