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公开(公告)号：CA2463777A1
公开(公告)日：2003-04-24
申请号：CA2463777
申请日：2002-10-11
Applicant: TORAY INDUSTRIES
Inventor： INOUE MIKIO , IGAKURA SHUICHI , CHIDA TAKASHI
Abstract: A fuel cell-use carbon fiber woven fabric, especially a carbon fiber woven fabric preferably used for the electrode diffusion layer of an electrode element in a fuel cell. The electrode diffusion layer of an electrode elemen t in a fuel cell, requiring conductivity, gas diffusing/permeating features, a nd strength that withstands handling, is formed from carbon fiber woven fabrics as is widely known. The conventional carbon fiber woven fabric poses such problems that deformation by compression is large, the dimension of a fuel cell is significantly changed by pressurizing, irregularities by weave textu re are large, and contact resistance is large. A carbon fiber woven fabric used for a fuel cell-use carbon fiber woven fabric has an average size of warps a nd wefts constituting the woven fabric of 0.005-0.028 g/m, and a woven density of the warps and/or wefts of 20 pieces/cm.
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公开(公告)号：CA3006426A1
公开(公告)日：2017-06-15
申请号：CA3006426
申请日：2016-12-08
Applicant: TORAY INDUSTRIES
Inventor： SODE KATSUYA , CHIDA TAKASHI , SUGAHARA TORU , WAKATABE MICHIO , HASHIMOTO MASARU , SUNAHARA TETSUYA , UMEZAKI YUYA
Abstract: The present invention addresses the problem of providing a gas diffusion electrode substrate which is excellent in suppressing reduction of power generation performance at high current density and can suppress fracturing or structural breakage during conveyance, and which can be stably produced. The present invention is: a porous carbon sheet including at least carbon fibers, the carbon sheet having a thickness of 30-95 µm, a gas permeation resistance of 0.5-8.8 Pa, and a tensile strength of 5-50 N/cm; and a gas diffusion electrode substrate having a microporous layer including at least an electroconductive filler on at least one surface of a porous carbon sheet including at least carbon fibers, the thickness of a large-pore part being 3-60 µm when the gas diffusion electrode substrate is divided into a small-pore part and a large-pore part in the thickness direction thereof.
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公开(公告)号：CA2962735A1
公开(公告)日：2016-04-21
申请号：CA2962735
申请日：2015-10-07
Applicant: TORAY INDUSTRIES
Inventor： TANIMURA YASUAKI , CHIDA TAKASHI , SUGAHARA TORU , UTSUNOMIYA MASAMICHI , KAMAE TOSHIYA , SODE KATSUYA , ANDO TAKASHI
Abstract: One purpose of the present invention is to provide a carbon sheet suitable for use in gas diffusion electrode base materials such that, in a gas diffusion electrode base material, anti-flooding properties are superior because of large improvements in gas diffusibility and drainage properties, high electricity generating performance can be expressed even when operated at comparatively low temperatures and in a high current density region, and further, mechanical properties, conductivity, and heat conductivity are superior. One embodiment of this carbon sheet for achieving the purpose above is a porous carbon sheet containing carbon fiber and a binder, wherein the carbon sheet is characterized in that when measuring the depth distribution of the surfaces and letting surface layer area ratio X be the proportion of the surface area for parts with a depth of 20 µm or less in a measured surface area on one surface and surface layer area ratio Y be the proportion of the surface area for parts with a depth of 20 µm or less in a measured surface area on the other surface, the surface layer area ratio X is larger than the surface layer area ratio Y and that difference is 3 - 12%.
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公开(公告)号：CA2499828A1
公开(公告)日：2004-04-15
申请号：CA2499828
申请日：2003-09-25
Applicant: TORAY INDUSTRIES
Inventor： CHIDA TAKASHI , INOUE MIKIO , OKADA KENYA , ISOI SHINYA
Abstract: A nonwoven fabric comprising a flame-retardant acrylic fiber, characterized in that it has a weight per square-meter of 70 to 190 g/m2, a thickness of 0.1 to 0.3 mm, a density of 0.35 to 0.8 g/cm3; and a nonwoven fabric comprising a carbon fiber, characterized in that it has a weight per square-meter of 50 t o 150 g/m2, a thickness of 0.1 to 0.25 mm, a density of 0.3 to 0.7 g/m3, a surface roughness Ra of 30 .mu.m or less, a tensile strength of 0.2 kgf/cm o r more, and a maximum fracture radius being defined in the specification of 20 mm or less. Said carbon fiber nonwoven fabric is produced by subjecting the above flame-retardant acrylic fiber to a carbonization treatment and can be suitably used as a material for forming an electrode of a fuel cell.
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公开(公告)号：CA2962735C
公开(公告)日：2022-07-19
申请号：CA2962735
申请日：2015-10-07
Applicant: TORAY INDUSTRIES
Inventor： TANIMURA YASUAKI , CHIDA TAKASHI , SUGAHARA TORU , UTSUNOMIYA MASAMICHI , KAMAE TOSHIYA , SODE KATSUYA , ANDO TAKASHI
IPC: H01M8/1062
Abstract: One purpose of the present invention is to provide a carbon sheet suitable for use in gas diffusion electrode base materials such that, in a gas diffusion electrode base material, anti-flooding properties are superior because of large improvements in gas diffusibility and drainage properties, high electricity generating performance can be expressed even when operated at comparatively low temperatures and in a high current density region, and further, mechanical properties, conductivity, and heat conductivity are superior. One embodiment of this carbon sheet for achieving the purpose above is a porous carbon sheet containing carbon fiber and a binder, wherein the carbon sheet is characterized in that when measuring the depth distribution of the surfaces and letting surface layer area ratio X be the proportion of the surface area for parts with a depth of 20 µm or less in a measured surface area on one surface and surface layer area ratio Y be the proportion of the surface area for parts with a depth of 20 µm or less in a measured surface area on the other surface, the surface layer area ratio X is larger than the surface layer area ratio Y and that difference is 3 - 12%.
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Patent Agency Ranking
公开(公告)号：CA2962740A1
公开(公告)日：2016-04-21
申请号：CA2962740
申请日：2015-10-07
Applicant: TORAY INDUSTRIES
Inventor： SODE KATSUYA , CHIDA TAKASHI , UTSUNOMIYA MASAMICHI , SUGAHARA TORU , ANDO TAKASHI
Abstract: The present invention provides a carbon sheet suitable for use in gas diffusion electrode base materials that has superior anti-flooding properties, can be prevented from bending into gas flow paths, further has superior mechanical properties, conductivity and thermal conductivity, and can be manufactured stably. One embodiment of this carbon sheet for achieving the purpose above is a porous carbon sheet containing carbon fiber and a binder, wherein the carbon sheet is characterized in that in a section from a plane having a 50% filling ratio closest to one surface to a plane having a 50% filling ratio closest to the other surface, when letting layer X be a layer with the largest filling ratio close to the one surface, layer Y be a layer with a filling ratio smaller than layer X close to the other surface, and layer Z be the layer positioned between layer X and layer Y for layers obtained by dividing the carbon sheet equally into three in a direction perpendicular to the surfaces, the filling ratio for the layers becomes smaller in order of layer X, layer Y, and layer Z.
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公开(公告)号：CA2962740C
公开(公告)日：2022-09-06
申请号：CA2962740
申请日：2015-10-07
Applicant: TORAY INDUSTRIES
Inventor： SODE KATSUYA , CHIDA TAKASHI , UTSUNOMIYA MASAMICHI , SUGAHARA TORU , ANDO TAKASHI
Abstract: The present invention provides a carbon sheet suitable for use in gas diffusion electrode base materials that has superior anti-flooding properties, can be prevented from bending into gas flow paths, further has superior mechanical properties, conductivity and thermal conductivity, and can be manufactured stably. One embodiment of this carbon sheet for achieving the purpose above is a porous carbon sheet containing carbon fiber and a binder, wherein the carbon sheet is characterized in that in a section from a plane having a 50% filling ratio closest to one surface to a plane having a 50% filling ratio closest to the other surface, when letting layer X be a layer with the largest filling ratio close to the one surface, layer Y be a layer with a filling ratio smaller than layer X close to the other surface, and layer Z be the layer positioned between layer X and layer Y for layers obtained by dividing the carbon sheet equally into three in a direction perpendicular to the surfaces, the filling ratio for the layers becomes smaller in order of layer X, layer Y, and layer Z.
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公开(公告)号：CA2623129C
公开(公告)日：2013-07-02
申请号：CA2623129
申请日：2006-08-25
Applicant: TORAY INDUSTRIES
Inventor： CHIDA TAKASHI , INOUE MIKIO , OKADA KENYA
Abstract: A porous carbon sheet obtained by binding separate carbon short fibers with a carbonization product of a resin, wherein the pore mode diameter of the sheet is 45 to 90 µm and the mean fiber diameter of the carbon short fibers is 5 to 20 µm. The sheet can be produced by thermoforming a precursor fiber sheet comprising carbon short fibers of 15 to 30 g/m2 in basis weight and a thermosetting resin of 30 to 80 g/m2 in basis weight by hot plates having a certain clearance and carbonizing the thermosetting resin contained in thermoformed precursor fiber sheet.
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公开(公告)号：CA2520025C
公开(公告)日：2012-01-03
申请号：CA2520025
申请日：2004-03-25
Applicant: TORAY INDUSTRIES
Inventor： CHIDA TAKASHI , OKADA KENYA , INOUE MIKIO , ISOI SHINYA
IPC: D06C9/04 , C04B35/83 , C04B38/00 , D01F9/22 , D04H1/64 , D06C15/02 , D06M11/74 , H01M4/86 , H01M4/88 , H01M4/92 , H01M4/96 , H01M8/10
Abstract: A porous carbon base material, which comprises a sheet containing carbon short fibers dispersed randomly and a carbonized resin, wherein the carbon short fibers are bound by the carbonized resin and the volume of pores having a pore diameter of 10 µm or less is 0.05 to 0.16 cc/g; and a method for producing the porous carbon base material, which comprises transporting a precursor fiber sheet comprising carbon short fibers dispersed randomly and a resin intermittently to a space between heated plates, subjecting the precursor to a heating and pressuring treatment by the heated plates while the transformation stops, carrying out the transportation of the sheet after the treatment, and then carrying out a heat treatment, to thereby carbonize the resin in the sheet.
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公开(公告)号：CA2623129A1
公开(公告)日：2007-04-05
申请号：CA2623129
申请日：2006-08-25
Applicant: TORAY INDUSTRIES
Inventor： CHIDA TAKASHI , OKADA KENYA , INOUE MIKIO
Abstract: A porous carbon sheet obtained by binding separate carbon short fibers with a carbonization product of a resin, wherein the pore mode diameter of the sheet is 45 to 90 µm and the mean fiber diameter of the carbon short fibers is 5 to 20 µm. The sheet can be produced by thermoforming a precursor fiber sheet comprising carbon short fibers of 15 to 30 g/m 2 in basis weight and a thermosetting resin of 30 to 80 g/m 2 in basis weight by hot plates having a certain clearance and carbonizing the thermosetting resin contained in thermoformed precursor fiber sheet.
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