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公开(公告)号：US20200243872A1
公开(公告)日：2020-07-30
申请号：US16774242
申请日：2020-01-28
Applicant: UNIVERSITY OF YAMANASHI
Inventor： Katsuyoshi KAKINUMA , Makoto UCHIDA , Akihiro IIYAMA
IPC: H01M4/92 , H01M8/1004
Abstract: The carrier metal catalyst achieves suppression of internal resistance of a fuel cell. A carrier metal catalyst includes: a carrier powder; and metal fine particles supported on the carrier powder; wherein: the carrier powder is an aggregates of carrier fine particles; the carrier fine particles includes a chained portion structured by a plurality of crystallites being fusion bonded to form a chain; the carrier fine particles include titanium oxide; the carrier fine particles are doped with an element having a valence different from a valence of titanium; the titanium oxide of the carrier powder has an anatase phase/rutile phase ratio of 0.2 or lower; the metal fine particles have a mean particle size of 3 to 10 nm; the metal fine particles include platinum; and a cell resistance measured under standard conditions of a fuel cell prepared using the carrier metal catalyst is 0.090 Ω·cm2 or lower.
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12.发明申请公开(公告)号：US20180178210A1
公开(公告)日：2018-06-28
申请号：US15738270
申请日：2016-06-29
Inventor： Kenji MIYATAKE , Makoto UCHIDA , Jyunpei MIYAKE , Takashi MOCHIZUKI , Hideaki ONO , Manai SHIMADA , Naoki YOKOTA , Natsumi YOSHIMURA
IPC: B01J39/19 , C08J5/22 , H01M8/1023 , H01M8/1039
CPC classification number: B01J39/19 , B01J47/12 , C08G61/02 , C08G61/10 , C08G2261/122 , C08G2261/1452 , C08G2261/146 , C08G2261/19 , C08G2261/312 , C08G2261/3424 , C08G2261/412 , C08G2261/516 , C08J5/2218 , C08J5/2262 , C08J2365/00 , H01M8/1023 , H01M8/1037 , H01M8/1039 , H01M2008/1095
Abstract: A cation exchange resin having improved chemical properties and mechanical properties, and a cation exchange membrane and an electrolyte membrane for a fuel cell using the same are provided.A cation exchange resin is used, the cation exchange resin comprising: a divalent hydrophobic unit; and a divalent hydrophilic unit having divalent hydrophilic groups which are repeated via carbon-carbon bond, the divalent hydrophilic groups being composed of one aromatic ring, or being composed of a plurality of aromatic rings which are bonded to each other via a divalent hydrocarbon group, a divalent silicon-containing group, a divalent nitrogen-containing group, a divalent phosphorus-containing group, a divalent oxygen-containing group, a divalent sulfur-containing group, or carbon-carbon bond, at least one of the aromatic rings having a cation exchange group; wherein the hydrophobic unit and the hydrophilic unit are bonded to each other via carbon-carbon bond.
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Patent Agency Ranking
公开(公告)号：US20170047600A1
公开(公告)日：2017-02-16
申请号：US15234688
申请日：2016-08-11
Applicant: UNIVERSITY OF YAMANASHI
Inventor： Makoto UCHIDA , Katsuyoshi KAKINUMA , Masahiro WATANABE , Akihiro IIYAMA
IPC: H01M8/04082 , H01M8/04746
CPC classification number: H01M4/925 , H01M8/04225 , H01M8/04238
Abstract: A fuel cell system and a method of operating the same is provided that is capable of reducing degradation of a cathode catalyst of a fuel cell. A fuel cell system is provided that includes a fuel cell having a catalyst used for an anode, wherein a carrier of the catalyst is composed of a material with a property where electric resistance in an oxygen containing atmosphere is greater than electric resistance in a hydrogen atmosphere; and a control device configured to control the fuel cell, when supply of fuel gas is stopped during stoppage of operation of the fuel cell, to consume all or part of the fuel gas in a fuel gas chamber, followed by introducing oxygen containing gas into the fuel gas chamber.
Abstract translation: 提供了能够降低燃料电池的阴极催化剂的劣化的燃料电池系统及其操作方法。 提供了一种燃料电池系统，其包括具有用于阳极的催化剂的燃料电池，其中，所述催化剂的载体由具有在含氧气氛中的电阻大于氢气氛中的电阻的性质的材料构成 ; 以及控制装置，被配置为当在燃料电池的停止操作期间停止供应燃料气体时，控制燃料电池，以消耗燃料气体室中的全部或部分燃料气体，随后将含氧气体引入到燃料电池 燃气舱。
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公开(公告)号：US20230321633A1
公开(公告)日：2023-10-12
申请号：US18042531
申请日：2021-08-20
Applicant: UNIVERSITY OF YAMANASHI
Inventor： Katsuyoshi KAKINUMA , Makoto UCHIDA , Akihiro IIYAMA
CPC classification number: B01J23/14 , B01J35/1014 , B01J35/0013 , B01J23/42 , B01J35/026 , B01J35/0033
Abstract: A supported metal catalyst in which an electric conductivity is enhanced. The supported metal catalyst includes a support powder; and metal fine particles supported by the support powder. The support powder is an aggregate of support fine particles; the support fine particles are provided with a chained portion structured by a plurality of crystallites being fusion-bonded to form a chain; the support fine particles are structured with a metal oxide; and the supported amount of metal fine particles per unit area of the surface area of the support powder calculated based on sphere approximation is 3.4 to 13.7 (mg/m2).
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公开(公告)号：US20230085417A1
公开(公告)日：2023-03-16
申请号：US17795027
申请日：2021-02-05
Applicant: UNIVERSITY OF YAMANASHI , NIKKI-UNIVERSAL CO., LTD.
Inventor： Toshihiro MIYAO , Hanako NISHINO , Kazutoshi HIGASHIYAMA , Makoto UCHIDA , Akihiro IIYAMA , Kazuya SHIBANUMA , Naoto KOIZUMI
Abstract: The present invention provides a supported metal catalyst with excellent effectiveness factor of active metal particles which are also free from deactivation by contacting with ionomer.
According to the present invention, provided is a supported metal catalyst, comprising a support that is a collective body of conductive particles; and dispersed active metal particles supported on the conductive particles, wherein the conductive particles include a plurality of pores, an average entrance pore diameter of the pores is 1 to 20 nm, a standard deviation of the average entrance pore diameter is equal to or less than 50% of the average entrance pore diameter, a number fraction of the active metal particles supported in a surface layer region of the conductive particles divided by the total number of the active metal particles is equal to or more than 50%, and the surface layer region is a region on a surface of the conductive particles or a region in the pores within a depth of 15 nm from the surface.-
公开(公告)号：US20230049745A1
公开(公告)日：2023-02-16
申请号：US17967180
申请日：2022-10-17
Applicant: UNIVERSITY OF YAMANASHI
Inventor： Katsuyoshi KAKINUMA , Makoto UCHIDA , Akihiro IIYAMA
IPC: H01M4/92 , H01M8/1004
Abstract: The carrier metal catalyst achieves suppression of internal resistance of a fuel cell. A carrier metal catalyst includes: a carrier powder; and metal fine particles supported on the carrier powder; wherein: the carrier powder is an aggregates of carrier fine particles; the carrier fine particles includes a chained portion structured by a plurality of crystallites being fusion bonded to form a chain; the carrier fine particles include titanium oxide; the carrier fine particles are doped with an element having a valence different from a valence of titanium; the titanium oxide of the carrier powder has an anatase phase/rutile phase ratio of 0.2 or lower; the metal fine particles have a mean particle size of 3 to 10 nm; the metal fine particles include platinum; and a cell resistance measured under standard conditions of a fuel cell prepared using the carrier metal catalyst is 0.090 Ωcm·2 or lower.
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公开(公告)号：US20190288297A1
公开(公告)日：2019-09-19
申请号：US16434031
申请日：2019-06-06
Inventor： Koji TANIGUCHI , Masahiro WATANABE , Makoto UCHIDA , Katsuyoshi KAKINUMA
IPC: H01M4/86 , H01M4/92 , H01M8/1004 , H01M4/90
Abstract: A membrane-electrode assembly including a catalyst layer that includes a catalyst-supporting carrier in which a catalyst is supported on a carrier made of an inorganic oxide, and a highly hydrophobic substance having a higher degree of hydrophobicity than the inorganic oxide, the catalyst layer being formed on at least one surface of a polymer electrolyte membrane. It is preferable that, in the membrane-electrode assembly, the degree of hydrophobicity of the highly hydrophobic substance is from 0.5 vol % to 45 vol % at 25° C., the degree of hydrophobicity being defined as a concentration of methanol (vol %) when a light transmittance of a dispersion obtained by dispersing the highly hydrophobic substance in a mixed solution of water and methanol reaches 80%.
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