Patents by Inventor Kazuyo Shigeta
Kazuyo Shigeta has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11430995Abstract: A gas diffusion electrode is provided that enables the achievement of a fuel cell which has high drainage performance and maintains good power generation performance, while exhibiting high power generation performance particularly at a low temperature (40° C.), if used in the fuel cell. The gas diffusion electrode includes a microporous layer on at least one surface of a conductive porous substrate, wherein the microporous layer has a fluorine compound region having a length of 3-10 ?m and a void having a length of 3-10 ?m.Type: GrantFiled: January 12, 2018Date of Patent: August 30, 2022Assignee: TORAY INDUSTRIES, INC.Inventors: Kazuyo Shigeta, Masamichi Utsunomiya
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Patent number: 11088370Abstract: A gas diffusion electrode including: a conductive porous substrate and a microporous layer on at least one side of the conductive porous substrate; in which the total of regions passing through the microporous layer in the thickness direction has an area ratio of 0.1% or more and 1% or less; and in which the microporous layer has a portion that has penetrated into the conductive porous substrate (hereinafter referred to as penetration portion), the penetration portion having a thickness ratio of 30% or more and 70% or less with respect to 100% of the thickness of the microporous layer. The gas diffusion electrode used for fuel cells affords fuel cells having high water removal performance and high power generation performance.Type: GrantFiled: September 15, 2017Date of Patent: August 10, 2021Inventors: Kazuyo Shigeta, Junichi Urai, Yasutaka Okano
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Patent number: 10950868Abstract: A gas diffusion electrode in which a microporous layer is provided on at least one surface of a conductive porous substrate, wherein the areas obtained by dividing the cross section perpendicular to the plane of the microporous layer into three equal parts in the thickness direction are a first area, a second area, and a third area, with respect to the conductive porous substrate side, the fluorine strength of the third area being 0.8 to 1.2 times the fluorine strength of the second area.Type: GrantFiled: December 16, 2016Date of Patent: March 16, 2021Assignee: TORAY INDUSTRIES, INC.Inventors: Kazuyo Shigeta, Masamichi Utsunomiya, Yasutaka Okano, Yasuaki Tanimura, Toshiya Kamae
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Patent number: 10818934Abstract: A gas diffusion electrode has a microporous layer on at least one surface of an electrical conducting porous substrate. The microporous layer has at least a first microporous layer in contact with the electrical conducting porous substrate, and a second microporous layer. The gas diffusion electrode has a pore size distribution with a peak at least in a first region of 10 ?m or more and 100 ?m or less, a second region of 0.2 ?m or more and less than 1.0 ?m, and a third region of 0.050 ?m or more and less than 0.2 ?m. The total volume of the pores in the second region is 10% or more and 40% or less of the total volume of the pores in the first region, and the total volume of the pores in the third region is 40% or more and 80% or less of the total volume of the pores in the second region.Type: GrantFiled: December 16, 2016Date of Patent: October 27, 2020Assignee: TORAY INDUSTRIES, INC.Inventors: Toru Miyake, Masamichi Utsunomiya, Yasuaki Tanimura, Kazuyo Shigeta
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Publication number: 20190326605Abstract: A gas diffusion electrode is provided that enables the achievement of a fuel cell which has high drainage performance and maintains good power generation performance, while exhibiting high power generation performance particularly at a low temperature (40° C.), if used in the fuel cell. The gas diffusion electrode includes a microporous layer on at least one surface of a conductive porous substrate, wherein the microporous layer has a fluorine compound region having a length of 3-10 ?m and a void having a length of 3-10 ?m.Type: ApplicationFiled: January 12, 2018Publication date: October 24, 2019Applicant: Toray Industries, Inc.Inventors: Kazuyo Shigeta, Masamichi Utsunomiya
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Publication number: 20190214651Abstract: A gas diffusion electrode including: a conductive porous substrate and a microporous layer on at least one side of the conductive porous substrate; in which the total of regions passing through the microporous layer in the thickness direction has an area ratio of 0.1% or more and 1% or less; and in which the microporous layer has a portion that has penetrated into the conductive porous substrate (hereinafter referred to as penetration portion), the penetration portion having a thickness ratio of 30% or more and 70% or less with respect to 100% of the thickness of the microporous layer. The gas diffusion electrode used for fuel cells affords fuel cells having high water removal performance and high power generation performance.Type: ApplicationFiled: September 15, 2017Publication date: July 11, 2019Applicant: Toray Industries, Inc.Inventors: Kazuyo Shigeta, Junichi Urai, Yasutaka Okano
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Publication number: 20190027761Abstract: A gas diffusion electrode has a microporous layer on at least one surface of an electrical conducting porous substrate. The microporous layer has at least a first microporous layer in contact with the electrical conducting porous substrate, and a second microporous layer. The gas diffusion electrode has a pore size distribution with a peak at least in a first region of 10 ?m or more and 100 ?m or less, a second region of 0.2 ?m or more and less than 1.0 ?m, and a third region of 0.050 ?m or more and less than 0.2 ?m. The total volume of the pores in the second region is 10% or more and 40% or less of the total volume of the pores in the first region, and the total volume of the pores in the third region is 40% or more and 80% or less of the total volume of the pores in the second region.Type: ApplicationFiled: December 16, 2016Publication date: January 24, 2019Applicant: TORAY INDUSTRIES, INC.Inventors: Toru Miyake, Masamichi Utsunomiya, Yasuaki Tanimura, Kazuyo Shigeta
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Publication number: 20180375105Abstract: A gas diffusion electrode in which a microporous layer is provided on at least one surface of a conductive porous substrate, wherein the areas obtained by dividing the cross section perpendicular to the plane of the microporous layer into three equal parts in the thickness direction are a first area, a second area, and a third area, with respect to the conductive porous substrate side, the fluorine strength of the third area being 0.8 to 1.2 times the fluorine strength of the second area.Type: ApplicationFiled: December 16, 2016Publication date: December 27, 2018Applicant: TORAY INDUSTRIES, INC.Inventors: Kazuyo Shigeta, Masamichi Utsunomiya, Yasutaka Okano, Yasuaki Tanimura, Toshiya Kamae