Patents by Inventor Makoto Higami
Makoto Higami 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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Publication number: 20160149250Abstract: The present invention relates to an electrolyte membrane, a membrane-electrode assembly and a polymer electrolyte fuel cell. The electrolyte membrane contains a polymer (1) including a hydrophobic structural unit and a structural unit having a proton-conducting group and a polymer (2) including a hydrophobic structural unit having no sulfonic group which is different from the hydrophobic structural unit of the polymer (1).Type: ApplicationFiled: July 9, 2014Publication date: May 26, 2016Applicant: JSR CORPORATIONInventors: Kouichi ONOUE, Shouhei FUJISHITA, Makoto HIGAMI, Hirofumi GOTOU, Takaaki SAKABE
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Patent number: 8399148Abstract: Provided is a varnish which contains a solvent and an electrode electrolyte for a solid polymer fuel cell electrolyte, which contains a polymer with a structure having a main chain including a polyphenylene, a side chain including a sulfonic acid group and a repeating structural unit as a side chain including a nitrogen-containing heterocyclic group.Type: GrantFiled: August 8, 2011Date of Patent: March 19, 2013Assignees: JSR Corporation, Honda Motor Co., Ltd.Inventors: Makoto Higami, Igor Rozhanskii, Yoshitaka Yamakawa, Nagayuki Kanaoka, Kaoru Fukuda, Ryoichiro Takahashi, Hiroshi Shinkai
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Publication number: 20120040271Abstract: An electrode electrolyte for a solid polymer electrolyte-type fuel cell contains a polymer, which has a polyphenylene structure as a main chain and both a sulfonic acid group and a nitrogen-containing heterocyclic group as a side chain. A side chain having the nitrogen-containing heterocyclic group has a structure represented by the following general formula (D). where Z represents at least one kind of structures selected from a group consisting of a direct bond, —O— and —S—, Y represents at least one member selected from a group consisting of —CO—, —SO2—, —SO—, —CONH—, —COO—, —(CF2)1— (1 is an integer of 1 to 10) and —C(CF3)2, R20 represents a specified nitrogen-containing heterocyclic group, q represents an integer of 1 to 5 and p represents an integer of 0 to 4.Type: ApplicationFiled: August 8, 2011Publication date: February 16, 2012Applicants: Honda Motor Co., Ltd., JSR CorporationInventors: Makoto Higami, Igor Rozhanskii, Yoshitaka Yamakawa, Nagayuki Kanaoka, Kaoru Fukuda, Ryoichiro Takahashi, Hiroshi Shinkai
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Patent number: 8043762Abstract: The present invention provides an electrode paste which comprises catalyst particles, a solvent and an varnish which comprises a solvent and an electrode electrolyte for a solid polymer fuel cell electrolyte, wherein the electrode electrolyte comprises a polymer with a structure having a main chain including a polyphenylene, a side chain including a sulfonic acid group and a repeating structural unit represented by formula (C) as a side chain including a nitrogen-containing heterocyclic group; wherein the structural variables are defined herein.Type: GrantFiled: June 30, 2006Date of Patent: October 25, 2011Assignees: JSR Corporation, Honda Motor Co., Ltd.Inventors: Makoto Higami, Igor Rozhanskii, Yoshitaka Yamakawa, Nagayuki Kanaoka, Kaoru Fukuda, Ryoichiro Takahashi, Hiroshi Shinkai
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Patent number: 7906608Abstract: A nitrogen-containing aromatic compound is represented by Formula (1). A polymer is obtained by polymerizing the compound. wherein X is an atom or a group selected from halogen atoms other than fluorine and —OSO2Rb (wherein Rb is an alkyl group, a fluorine-substituted alkyl group or an aryl group); Y is at least one structure selected from the group consisting of —CO—, —SO2—, —SO—, —CONH—, —COO—, —(CF2)1— (wherein l is an integer of 1 to 10) and —C(CF3)2—; Z is at least one structure selected from the group consisting of a direct bond, —O— and —S—; R20 is a nitrogen-containing heterocyclic group; q is an integer of 1 to 5; and p is an integer of 0 to 4.Type: GrantFiled: June 30, 2006Date of Patent: March 15, 2011Assignee: JSR CorporationInventors: Makoto Higami, Igor Rozhanskii, Yoshitaka Yamakawa
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Patent number: 7893303Abstract: A polyarylene having a structural unit shown by the following formula (1) is disclosed. wherein X and Y indicate a divalent organic group or a single bond, Z shows an oxygen atom or a sulfur atom, R represents at least one atom or group selected from the group consisting of a hydrogen atom, a fluorine atom, an alkyl group, and a fluorine-substituted alkyl group, a is an integer of 1 to 20, n is an integer of 1 to 5, and p is an integer of 0 to 10.Type: GrantFiled: February 4, 2005Date of Patent: February 22, 2011Assignee: JSR CorporationInventors: Yoshitaka Yamakawa, Makoto Higami
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Publication number: 20090149623Abstract: A nitrogen-containing aromatic compound is represented by Formula (1). A polymer is obtained by polymerizing the compound. wherein X is an atom or a group selected from halogen atoms other than fluorine and —OSO2Rb (wherein Rb is an alkyl group, a fluorine-substituted alkyl group or an aryl group); Y is at least one structure selected from the group consisting of —CO—, —SO2—, —SO—, —CONH—, —COO—, —(CF2)l— (wherein l is an integer of 1 to 10) and —C(CF3)2—; Z is at least one structure selected from the group consisting of a direct bond, —O— and —S—; R20 is a nitrogen-containing heterocyclic group; q is an integer of 1 to 5; and p is an integer of 0 to 4.Type: ApplicationFiled: June 30, 2006Publication date: June 11, 2009Applicant: JSR CorporationInventors: Makoto Higami, Igor Rozhanskii, Yoshitaka Yamakawa
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Publication number: 20090130526Abstract: This invention provides an electrode electrolyte for a solid polymer-type fuel cell, in which a cost problem and a problem related to recovery of catalyst metals are solved, having excellent proton conductivity, dimensional stability and heat resistance. An electrode electrolyte for a solid polymer electrolyte-type fuel cell contains a polymer, which has a polyphenylene structure as a main chain and both a sulfonic acid group and a nitrogen-containing heterocyclic group as a side chain. A side chain having the nitrogen-containing heterocyclic group has a structure represented by the following general formula (D). (In formula, Z represents at least one kind of structures selected from a group consisting of a direct bond, —O— and —S—, Y represents at least one kind of structures selected from a group consisting of —CO—, —SO2—, —SO—, —CONH—, —COO—, —(CF2)1— (1 is an integer of 1 to 10) and —C(CF3)2— and R20 represents a nitrogen-containing heterocyclic group.Type: ApplicationFiled: June 30, 2006Publication date: May 21, 2009Applicants: JSR CORPORATION, HONDA MOTOR CO., LTD.Inventors: Makoto Higami, Igor Rozhanskii, Yoshitaka Yamakawa, Nagayuki Kanaoka, Kaoru Fukuda, Ryoichiro Takahashi, Hiroshi Shinkai
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Publication number: 20080015389Abstract: A polyarylene having a structural unit shown by the following formula (1) is disclosed. wherein X and Y indicate a divalent organic group or a single bond, Z shows an oxygen atom or a sulfur atom, R represents at least one atom or group selected from the group consisting of a hydrogen atom, a fluorine atom, an alkyl group, and a fluorine-substituted alkyl group, a is an integer of 1 to 20, n is an integer of 1 to 5, and p is an integer of 1 to 10.Type: ApplicationFiled: February 4, 2005Publication date: January 17, 2008Applicant: JSR CorporationInventors: Yoshitaka Yamakawa, Makoto Higami
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Publication number: 20060269655Abstract: The present invention is intended to provide a process for producing an electrolyte membrane-bonded electrode having excellent power generation property when constitutes an electrode assembly, and a varnish composition for an electrolyte, by the use of which an electrolyte membrane-electrode bonded structure capable of retaining excellent power generation property is obtained. A process for producing a first electrolyte membrane-bonded electrode comprises applying, onto an electrode, a water-containing dispersion containing a perfluorosulfonic acid polymer, an organic solvent A and water and having a perfluorosulfonic acid polymer content of 0.5 to 20% by weight and then applying, onto the resulting film, a solution of sulfonated polyarylene in an organic solvent B, to form an electrolyte membrane.Type: ApplicationFiled: August 3, 2006Publication date: November 30, 2006Inventors: Makoto Higami, Kohei Goto, Nagayuki Kanaoka, Ryoichiro Takahashi, Yoichi Asano, Osamu Kakutani, Gen Okiyama
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Patent number: 7115699Abstract: Provided are a sulfonated polymer capable of high hot water resistance even if it has an increased amount of the sulfonic groups introduced therein, and a solid polymer electrolyte containing the sulfonated polymer that has high proton conductivity and excellent generating performance. The sulfonated polymer has repeating units represented by the formula (1?): wherein B's are each independently an oxygen or a sulfur atom, R1 to R3 may be the same or different and are selected from a hydrogen atom, a fluorine atom, a nitrile group and an alkyl group, n is an integer of 2 or greater, and Q is a structure represented by the formula (q): wherein A is independently a divalent atom or organic group or a direct bond, and R4 to R11 may be the same or different and are selected from a hydrogen atom, a fluorine atom, an alkyl group and an aromatic group.Type: GrantFiled: October 6, 2004Date of Patent: October 3, 2006Assignee: JSR CorporationInventors: Yoshitaka Yamakawa, Makoto Higami, Toshiaki Kadota
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Patent number: 7060748Abstract: A catalyst paste composition for making electrodes has a uniform dispersion condition of a carbon black supporting a hydrogen reduction catalyst and is excellent in storage stability. The catalyst paste composition comprises a carbon black supporting a hydrogen reduction catalyst, an electrolyte, a water-soluble sulfonated polymer and a solvent.Type: GrantFiled: May 20, 2003Date of Patent: June 13, 2006Assignees: JSR Corporation, Honda Motor Co.,Ltd.Inventors: Makoto Higami, Keiichi Bessho
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Publication number: 20050080220Abstract: Provided are a sulfonated polymer capable of high hot water resistance even if it has an increased amount of the sulfonic groups introduced therein, and a solid polymer electrolyte containing the sulfonated polymer that has high proton conductivity and excellent generating performance. The sulfonated polymer has repeating units represented by the formula (1?): wherein B's are each independently an oxygen or a sulfur atom, R1 to R3 may be the same or different and are selected from a hydrogen atom, a fluorine atom, a nitrile group and an alkyl group, n is an integer of 2 or greater, and Q is a structure represented by the formula (q): wherein A is independently a divalent atom or organic group or a direct bond, and R4 to R11 may be the same or different and are selected from a hydrogen atom, a fluorine atom, an alkyl group and an aromatic group.Type: ApplicationFiled: October 6, 2004Publication date: April 14, 2005Applicant: JSR CORPORATIONInventors: Yoshitaka Yamakawa, Makoto Higami, Toshiaki Kadota
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Publication number: 20050026029Abstract: A process of producing an electrode paste having excellent storage stability and capable of forming a catalyst layer that has a sufficient pore volume for high generating performance, and an electrode paste composition having such properties are disclosed. The process comprises mixing and agitating carbon black supporting a catalyst metal, a polymer electrolyte, an organic solvent and at least either carbon fiber or water thereby to finely disperse the carbon black to a predetermined mean particle diameter of particles dispersed in the mixed solution, and admixing a dispersant to the mixed solution and agitating the resultant mixture to obtain an electrode paste in which particles having a predetermined mean particle diameter are uniformly dispersed.Type: ApplicationFiled: July 29, 2004Publication date: February 3, 2005Inventors: Junji Kawai, Makoto Higami, Kohei Goto, Ryoichiro Takahashi, Yoichi Asano
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Patent number: 6825310Abstract: A polymer which has a flexible structure in its main chain and thus exhibits a high toughness and can difficultly be deteriorated in its mechanical properties and thermal properties even when sulfonated, a sulfonic acid group-containing polymer obtained by the sulfonation of the polymer, and a proton-conductive membrane having an excellent mechanical strength and durability made of the sulfonic acid group-containing polymer. A novel halogenated aromatic compound represented by the following general formula (1m) is provided: wherein A independently represents an electron-withdrawing group; B independently represents an electron-donating atom or group; X represents a chlorine atom, iodine atom or bromine atom; R1 to R8 may be the same or different and each represent a hydrogen atom, fluorine atom or alkyl group; and n represents an integer of 2 or more.Type: GrantFiled: March 26, 2002Date of Patent: November 30, 2004Assignee: JSR CorporationInventors: Kohei Goto, Masayuki Takahashi, Yoshitaka Yamakawa, Makoto Higami
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Patent number: 6794480Abstract: A monomer containing an electron-withdrawing group and an electron-donative group which can be easily controlled in the upper limit of the amount of a sulfonic acid, which impairs the mechanical properties of a copolymer, and can provide a sulfonated polymer that forms a proton-conductive membrane having a high proton conductivity over a wide temperature range, an excellent mechanical strength and an excellent proton conductivity and showing inhibited swelling in hot water and an aqueous solution of methanol, and a copolymer obtained from the monomer. A monomer containing an electron-withdrawing group and an electron-donative group represented by the following general formula (1): wherein Y represents a iodine atom, chlorine atom or bromine atom; X represents an electron-withdrawing group; B represents an electron-donative group; and Z represents an aryl group having a specific structure or a monovalent condensed ring hydrocarbon group such as naphthyl group.Type: GrantFiled: March 26, 2002Date of Patent: September 21, 2004Assignee: JSR CorporationInventors: Kohei Goto, Masayuki Takahashi, Yoshitaka Yamakawa, Makoto Higami
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Publication number: 20040166399Abstract: The invention provides an electrode paste composition that enables a sufficient pore volume of electrode for high generating performance while maintaining good storage stability. The paste composition comprises a carbon black supporting a hydrogen reduction catalyst, an electrolyte, an organic solvent having a boiling point of 100 to 200° C., a water-soluble organic solvent having a boiling point of less than 100° C., and optionally one or more components selected from a dispersant, a carbon fiber and water.Type: ApplicationFiled: February 12, 2004Publication date: August 26, 2004Applicants: JSR CORPORATION, HONDA MOTOR CO., LTD.Inventors: Makoto Higami, Junji Kawai, Kaoru Fukuda, Junji Matsuo, Ryoichiro Takahashi, Yuichiro Hama
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Publication number: 20040157107Abstract: A catalyst paste composition for making electrodes has a uniform dispersion condition of a carbon black supporting a hydrogen reduction catalyst and is excellent in storage stability. The catalyst paste composition comprises a carbon black supporting a hydrogen reduction catalyst, an electrolyte, a water-soluble sulfonated polymer and a solvent.Type: ApplicationFiled: January 21, 2004Publication date: August 12, 2004Inventors: Makoto Higami, Keiichi Bessho
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Publication number: 20040028806Abstract: The present invention is intended to provide A process for producing an electrolyte membrane-bonded electrode having excellent power generation properties property when constitutes in an electrode assembly, and a varnish composition for an electrolyte, by the use of which to obtain an electrolyte membrane-electrode bonded structure capable of retaining excellent power generation properties. is obtaned. A process for producing a first electrolyte membrane bonded electrode comprises applying, onto an electrode, a water containing dispersion containing a perfluorosulfonic acid polymer, an organic solvent A and water and having a perfluorosulfonic acid polymer content of 0.Type: ApplicationFiled: April 23, 2003Publication date: February 12, 2004Inventors: Makoto Higami, Kohei Goto, Nagayuki Kanaoka, Ryoichiro Takahashi, Yoichi Asano, Osamu Kakutani, Gen Okiyama
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Patent number: 6685984Abstract: The method for the production of multilayers comprises: applying a coating solution (I) which comprises a dissolved or dispersed proton-conductive polymer and a solvent (Is) containing water in amounts from 25 to 60 wt % and an organic solvent in amounts from 75 down to 40 wt %, on an electrode, applying a coating solution (II) which comprises a dissolved or dispersed proton-conductive polymer and a solvent (IIs) containing water in amounts from 0 to less than 25 wt % and an organic solvent in amounts above 75 wt %, on the wet first coating without any drying of the first coating; and drying the coatings to form an electrolyte membrane. The methods can provide multilayers capable of satisfactory power generation properties as an electrode structure by forming an electrolyte membrane on an electrode without causing any penetration of electrolyte into the electrode.Type: GrantFiled: May 29, 2003Date of Patent: February 3, 2004Assignees: JSR Corporation, Honda Giken Kogyo Kabushiki KaishaInventors: Makoto Higami, Kohei Goto, Yoichi Asano, Ryoichiro Takahashi, Osamu Kakutani, Gen Okiyama