公开(公告)号：US20240030461A1

公开(公告)日：2024-01-25

申请号：US18037616

申请日：2021-11-25

Applicant: TORAY INDUSTRIES, INC.

Inventor： Hiroaki OTAKE ,  Masamichi UTSUNOMIYA ,  Fumitaka WATANABE

IPC: H01M4/88 ,  H01M8/1004 ,  H01M4/86 ,  H01M4/96 ,  H01M8/1018

CPC classification number: H01M4/8807 ,  H01M8/1004 ,  H01M4/8605 ,  H01M4/96 ,  H01M4/8673 ,  H01M8/1018 ,  H01M2008/1095

Abstract: An object of the present invention is to shorten the aging time for a fuel cell. To achieve the object, a gas diffusion electrode medium product according to the present invention includes sulfuric acid in an amount of 1.1 μg/cm2 or less. In addition, a polymer electrolyte fuel cell according to the present invention has the gas diffusion electrode medium product according to the present invention incorporated therein.

公开(公告)号：US20240154133A1

公开(公告)日：2024-05-09

申请号：US18284379

申请日：2022-03-22

Applicant: TORAY Industries, Inc.

Inventor： Hiroaki OTAKE ,  Masamichi UTSUNOMIYA ,  Fumitaka WATANABE

IPC: H01M4/88 ,  H01M4/86

CPC classification number: H01M4/8807 ,  H01M4/8605 ,  H01M4/8652 ,  H01M4/8875

Abstract: An object of the present invention is to provide an electrode substrate that maintains electrical conductivity and achieves both a high drainage performance and any one of a high gas diffusivity and spring property. To achieve the above-described object, an electrode substrate according to the present invention is an electrode substrate including a carbon fiber sheet having pores filled with a fluoropolymer and carbon fine powder, wherein, in terms of a fluorine/carbon ratio (F/C), the ratio of the smallest value (F/Cmin) to the largest value (F/Cmax) of the average value (F/C-1) in one surface of the electrode substrate, the average value (F/C-2) in the central plane in the thickness direction, and the average value (F/C-3) in the other surface is 0.80 or more, and wherein, in a pore size distribution, the electrode substrate has at least a first peak present in the range of pore size of 0.5 μm or more and less than 120 μm and a second peak present in the range of pore size of 10 nm or more and less than 0.5 μm, and the ratio (V1/V2) of the peak volume (V1) of the first peak to the peak volume (V2) of the second peak is 1.0 to 7.0.

公开(公告)号：US20220200012A1

公开(公告)日：2022-06-23

申请号：US17602054

申请日：2020-03-16

Applicant: TORAY INDUSTRIES, INC.

Inventor： Masamichi UTSUNOMIYA ,  Satoru SHIMOYAMA ,  Fumitaka WATANABE

IPC: H01M4/88 ,  H01M4/92 ,  H01M4/86 ,  H01M8/1004 ,  H01M8/1018

Abstract: In order to provide a gas diffusion electrode medium having high thermal conductivity despite having low density and excellent both in handleability and cell performance, provided is a gas diffusion electrode medium including carbon fiber felt including carbon fibers having an average fiber diameter of 5 to 20 μm, wherein at least a part of the carbon fibers that constitute the carbon fiber felt have a flat part in which, in a plane view of a surface of the carbon fiber felt, a maximum value of a fiber diameter is observed to be 10 to 50% larger than the average fiber diameter, and a frequency of the flat parts at the surface of the carbon fiber felt is 50 to 200/mm2.

公开(公告)号：US20190165379A1

公开(公告)日：2019-05-30

申请号：US16312782

申请日：2017-07-04

Applicant: TORAY INDUSTRIES, INC.

Inventor： Kentaro KAJIWARA ,  Satoru SHIMOYAMA ,  Fumitaka WATANABE ,  Yasuaki TANIMURA

IPC: H01M4/88 ,  D04H1/495 ,  D06C23/04 ,  D04H1/4242 ,  H01M4/96 ,  H01M8/1023

Abstract: The purpose of the present invention is to improve water drainage performance of a gas diffusion electrode including a carbon fiber nonwoven fabric. The present invention provides a gas diffusion electrode base material essentially consisting of a carbon fiber nonwoven fabric, wherein the carbon fiber nonwoven fabric has an in-plane basis weight pattern in which high basis weight regions having a relatively high basis weight and low basis weight regions having a relatively low basis weight are arranged, and the carbon fiber nonwoven fabric has on at least one surface an uneven pattern in which recesses and projections are arranged, the uneven pattern being formed independently of the basis weight pattern.

公开(公告)号：US20230128336A1

公开(公告)日：2023-04-27

申请号：US17914015

申请日：2021-03-18

Applicant: TORAY INDUSTRIES, INC.

Inventor： Hiroaki OTAKE ,  Masamichi UTSUNOMIYA ,  Fumitaka WATANABE

IPC: H01M4/88 ,  H01M4/86 ,  H01M4/96 ,  H01M8/0245 ,  H01M8/0234 ,  H01M8/0239 ,  H01M8/0243

Abstract: The objective of the present invention is to provide a method which is for producing a gas diffusion electrode substrate having a high conductivity and a chemical resistance, and by which an increase in production cost can be suppressed. The present invention is a method for producing a gas diffusion electrode substrate in which a microporous layer is formed in a conductive porous body formed by bonding carbon fibers to each other by means of a cured product of a binder resin, the method having, in the following order: a binder resin impregnation step in which a carbon fiber structure is impregnated with a binder resin composition to obtain a pre-impregnated body; a coating step in which the surface of the pre-impregnated body is coated with a microporous layer coating solution; and a heat treatment step in which the pre-impregnated body that has been subjected to the coating step is heat-treated at a temperature of at least 200° C., wherein the binder resin composition is a liquid composition including a binder resin and a carbon powder, the binder resin being a thermosetting resin, and the method does not have a step for heat-treating the pre-impregnated body at a temperature of at least 200° C., between the binder resin impregnation step and the heat treatment step.

公开(公告)号：US20190312295A1

公开(公告)日：2019-10-10

申请号：US16342795

申请日：2017-11-30

Applicant: TORAY INDUSTRIES, INC.

Inventor： Kentaro KAJIWARA ,  Masamichi UTSUNOMIYA ,  Fumitaka WATANABE ,  Yasuaki TANIMURA

IPC: H01M8/18 ,  H01M4/86 ,  H01M4/96

Abstract: The purpose of the present invention is to provide an electrode which is used as a liquid flow-through device electrode and in which liquid flow-through resistance is reduced and the utilization efficiency of carbon fiber is enhanced. Another object of the present invention is to provide a redox flow battery having excellent charge-discharge performance by use of the electrode which is used for the liquid flow-through device. The present invention provides an electrode for a liquid flow-through device, the electrode essentially consisting of a carbon fiber nonwoven fabric, having a thickness of more than 0.40 mm, and having a through-hole disposed therein, or a non-through-hole disposed on one surface or both surfaces of the electrode.

公开(公告)号：US20190260033A1

公开(公告)日：2019-08-22

申请号：US16346792

申请日：2017-12-11

Applicant: TORAY INDUSTRIES, INC.

Inventor： Kentaro KAJIWARA ,  Masamichi UTSUNOMIYA ,  Fumitaka WATANABE ,  Yasuaki TANIMURA

IPC: H01M4/66 ,  H01M8/18

Abstract: An object of the present invention is to provide an electrode which is used for a liquid flow-through device and in which liquid flow-through resistance is reduced and the utilization efficiency of the surface of carbon fiber is enhanced. Another object of the present invention is to provide a redox flow battery having excellent charge-discharge performance by use of the electrode which is used for the liquid flow-through device. The present invention provides an electrode to be used for a liquid flow-through device, the electrode including a plurality of sheets of carbon fiber nonwoven fabric each having irregularities on a surface of the sheet of carbon fiber nonwoven fabric being stacked or each having a through-hole on the carbon fiber sheet being stacked, and having inside of the electrode a plurality of gaps which is formed by recesses of the irregularities or the through-hole and is not opened in a thickness direction.