Patents by Inventor Hitotoshi Murase
Hitotoshi Murase 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: 10424791Abstract: It is an assignment to be solved to provide an electrode for secondary battery, electrode in which the active material is suppressed from coming off or falling down from the electricity collector, and that has excellent cyclic performance. It is characterized in that, in an electrode for secondary battery, the electrode being manufactured via an application step of applying a binder resin and an active material onto a surface of electricity collector, said hinder resin is an alkoxysilyl group-containing resin that has a structure being specified by formula (I): wherein “R1” is an alkyl group whose number of carbon atoms is from 1 to 8; “R2” is an alkyl group or alkoxyl group whose number of carbon atoms is from 1 to 8; and “q” is an integer of from 1 to 100.Type: GrantFiled: January 5, 2016Date of Patent: September 24, 2019Assignee: Arakawa Chemical Industries, LtdInventors: Hitotoshi Murase, Toshio Otagiri, Kyoichi Kinoshita, Katsufumi Tanaka, Manabu Miyoshi
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Publication number: 20190245208Abstract: It is an assignment to be solved to provide an electrode for secondary battery, electrode in which the active material is suppressed from coming off or falling down from the electricity collector, and that has excellent cyclic performance. It is characterized in that, in an electrode for secondary battery, the electrode being manufactured via an application step of applying a binder resin and an active material onto a surface of electricity collector, said binder resin is an alkoxysilyl group-containing resin that has a structure being specified by formula (I): wherein “R1” is an alkyl group whose number of carbon atoms is from 1 to 8; “R2” is an alkyl group or alkoxyl group whose number of carbon atoms is from 1 to 8; and “q” is an integer of from 1 to 100.Type: ApplicationFiled: January 5, 2016Publication date: August 8, 2019Inventors: Hitotoshi MURASE, Toshio OTAGIRI, Kyoichi KINOSHITA, Katsufumi TANAKA, Manabu MIYOSHI
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Patent number: 9735422Abstract: Provided is a negative-electrode active material, which is capable of constituting a lithium ion secondary cell exhibiting excellent cell characteristics. The negative-electrode active material for a lithium ion secondary cell of the invention includes a mixed material of silicon oxide particles composed of silicon oxide and rod-shaped iron oxide particles composed of iron oxide. It is preferable to use iron oxide particles having a plurality of pores in a surface, and an electrode reaction is effectively carried out.Type: GrantFiled: May 10, 2012Date of Patent: August 15, 2017Assignee: NATIONAL UNIVERSITY CORPORATION GUNMA UNIVERSITYInventors: Keiichi Hayashi, Manabu Miyoshi, Takayuki Hirose, Hitotoshi Murase, Hideyuki Morimoto, Shin-ichi Tobishima
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Publication number: 20170194646Abstract: It is an assignment to be solved to provide an electrode for secondary battery, electrode in which the active material is suppressed from coming off or falling down from the electricity collector, and that has excellent cyclic performance. It is characterized in that, in an electrode for secondary battery, the electrode being manufactured via an application step of applying a binder resin and an active material onto a surface of electricity collector, said binder resin is an alkoxysilyl group-containing resin that has a structure being specified by formula (I): wherein “R1” is an alkyl group whose number of carbon atoms is from 1 to 8; “R2” is an alkyl group or alkoxyl group whose number of carbon atoms is from 1 to 8; and “q” is an integer of from 1 to 100.Type: ApplicationFiled: January 5, 2016Publication date: July 6, 2017Inventors: Hitotoshi MURASE, Toshio OTAGIRI, Kyoichi KINOSHITA, Katsufumi TANAKA, Manabu MIYOSHI
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Patent number: 9337477Abstract: To provide a lithium ion secondary battery electrode in which a coated layer is held on a surface of an active material layer over a long period of time to suppress decomposition of the electrolysis solution and to enhance the cyclability, a manufacturing process for the same, and a lithium ion secondary battery using the electrode. A lithium ion secondary battery electrode includes a current collector, an active material layer containing a binder formed on a surface of the current collector, and a coated layer formed on the surface of at least a part of the active material layer, wherein the coated layer is an acrylic type copolymer cured substance including an acrylic type main chain and a side chain having polyester or polyether graft-polymerized to the acrylic type main chain and the coated layer is chemically bonded with the binder.Type: GrantFiled: May 2, 2012Date of Patent: May 10, 2016Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Junichi Niwa, Yuichi Hirakawa, Manabu Miyoshi, Keiichi Hayashi, Hitotoshi Murase
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Patent number: 9315390Abstract: A production process for lithium-silicate-based compound according to the present invention is characterized in that: a lithium-silicate compound being expressed by Li2SiO3 is reacted with a transition-metal-element-containing substance including at least one member being selected from the group consisting of iron and manganese at 550° C. or less within a molten salt including at least one member being selected from the group consisting of alkali-metal nitrates as well as alkali-metal hydroxides in an atmosphere in the presence of a mixed gas including carbon dioxide and a reducing gas. In accordance with the present invention, it is possible to produce lithium-silicate-based materials, which are useful as a positive-electrode active material for lithium-ion secondary battery, and the like, at low temperatures by means of relatively easy means.Type: GrantFiled: June 17, 2011Date of Patent: April 19, 2016Assignees: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Toshikatsu Kojima, Takuhiro Miyuki, Tetsuo Sakai, Akira Kojima, Junichi Niwa, Hitotoshi Murase, Kazuhito Kawasumi
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Patent number: 9306220Abstract: To provide a lithium ion secondary battery electrode in which a coated layer is held on a surface of an active material layer over a long period of time to suppress decomposition of the electrolysis solution and to enhance the cyclability, a manufacturing process for the same, and a lithium ion secondary battery using the electrode. A lithium ion secondary battery electrode includes a current collector, an active material layer containing a binder formed on a surface of the current collector, and a coated layer formed on the surface of at least a part of the active material layer, wherein the coated layer contains a silicone-acrylic graft copolymer cured substance including an acrylic type main chain having a functional group and a side chain having a silicone graft-polymerized to the acrylic type main chain, and the coated layer is chemically bonded with the binder.Type: GrantFiled: May 2, 2012Date of Patent: April 5, 2016Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Junichi Niwa, Yuichi Hirakawa, Manabu Miyoshi, Keiichi Hayashi, Hitotoshi Murase
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Patent number: 9269954Abstract: The present invention is one which provides a production process for lithium-silicate-system compound, the production process being characterized in that: a lithium-silicate compound being expressed by Li2SiO3 is reacted with a substance including at least one member of transition-metal elements that is selected from the group consisting of iron and manganese at 400-650° C. in a molten salt of a carbonate mixture comprising lithium carbonate and at least one member of alkali-metal carbonates that is selected from the group consisting of potassium carbonate, sodium carbonate, rubidium carbonate and cesium carbonate in a mixed-gas atmosphere including carbon dioxide and a reducing gas; and a positive-electrode active material for lithium-ion secondary battery that comprises a lithium-silicate-system compound being obtained by the aforesaid process.Type: GrantFiled: November 20, 2009Date of Patent: February 23, 2016Assignees: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Toshikatsu Kojima, Tetsuo Sakai, Takuhiro Miyuki, Yasue Okuyama, Akira Kojima, Junichi Niwa, Hitotoshi Murase
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Patent number: 9214677Abstract: To provide a lithium ion secondary battery electrode in which a coat is held on a surface of an active material layer over a long period of time to suppress decomposition of the electrolysis solution and to enhance the cyclability, a manufacturing process for the same, and a lithium ion secondary battery using the electrode. A lithium ion secondary battery electrode includes a current collector, an active material layer containing a binder formed on a surface of the current collector, and a coat containing modified polydimethylsiloxane formed on a surface of at least a part of the active material layer, wherein the coat is chemically bonded with the binder.Type: GrantFiled: April 19, 2012Date of Patent: December 15, 2015Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Yuichi Hirakawa, Manabu Miyoshi, Keiichi Hayashi, Hitotoshi Murase
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Patent number: 9184439Abstract: Providing a noble negative-electrode active material including silicon, and a production process for the same. A negative-electrode active material for non-aqueous-system secondary battery including a silicon phase and a composite oxide phase (a CaSiO3 phase, for instance) is obtained by mixing a silicon oxide (SiO, for instance) with a silicon compound (CaSi2, for instance), which includes silicon and at least one member of elements being selected from the group consisting of Group 2 (or Group 2A) elements in the Periodic Table, to prepare a mixed raw material, and then reacting the mixed raw material. The composite oxide phase demonstrates the advantage of inhibiting electrolytic solutions from decomposing in a smaller amount than does the conventional SiO2 phase.Type: GrantFiled: December 8, 2010Date of Patent: November 10, 2015Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHAInventors: Manabu Miyoshi, Hideaki Ishikawa, Hitotoshi Murase
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Patent number: 9039926Abstract: A production process for composite oxide expressed by a compositional formula: LiMn1-xAxO2, where “A” is one or more kinds of metallic elements other than Mn; and 0?“x”<1, obtained by preparing a raw-material mixture by mixing a metallic-compound raw material and a molten-salt raw material with each other, the metallic-compound raw material at least including an Mn-containing nitrate that includes one or more kinds of metallic elements in which Mn is essential, the molten-salt raw material including lithium hydroxide and lithium nitrate, and exhibiting a proportion of the lithium nitrate with respect to the lithium hydroxide (Lithium Nitrate/Lithium Hydroxide) that falls in a range of from 1 or more to 3 or less by molar ratio; reacting the raw-material mixture at 500° C. or less by melting it; and recovering the composite oxide being generated from the raw-material mixture that has undergone the reaction.Type: GrantFiled: February 7, 2011Date of Patent: May 26, 2015Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Ryota Isomura, Hitotoshi Murase, Naoto Yasuda
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Patent number: 8940436Abstract: Provided is a sulfur-modified polyacrylonitrile manufacturing method that is characterized in that a starting base powder that comprises sulfur powder and polyacrylonitrile powder is mixed and the mixture is heated in a non-oxidizing environment while outflow of sulfur vapor is prevented. Also provided are a cathode for lithium batteries that uses, as the active substance, the sulfur-modified polyacrylonitrile manufactured with the method, and a lithium secondary battery that includes the cathode as a component element. This enables the practical use of an inexpensive sulfur-based material as the cathode material for lithium secondary batteries, and in particular, a sulfur-based cathode material that enables higher output and has excellent cycle life characteristics, as well as other characteristics, and secondary lithium batteries using the same can be obtained.Type: GrantFiled: October 15, 2009Date of Patent: January 27, 2015Assignees: National Institute of Advanced Industrial Science and Technology, Kabushiki Kaisha Toyota JidoshokkiInventors: Takuhiro Miyuki, Tetsuo Sakai, Junichi Niwa, Hitotoshi Murase
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Patent number: 8927157Abstract: Provided is a condensed polycyclic aromatic compound, having lithium ion responsivity and is suitable for lithium ion secondary battery applications, a production process thereof, a positive electrode active material containing that condensed polycyclic aromatic compound, and a positive electrode for a lithium ion secondary battery provided therewith, and further provided is a lithium ion secondary battery, having high capacity and cycling adaptability, that has the positive electrode as a constituent thereof. The condensed polycyclic aromatic compound has at least four imino groups in a molecule thereof.Type: GrantFiled: May 26, 2011Date of Patent: January 6, 2015Assignees: Kabushiki Kaisha Toyota Jidoshokki, Keio UniversityInventors: Osamu Ohmori, Akiko Shima, Hitotoshi Murase, Masataka Nakanishi, Junichi Niwa, Kimihisa Yamamoto
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Patent number: 8877381Abstract: A composite oxide is produced via the following: a raw-material mixture preparation step of preparing a raw-material mixture by mixing a metallic-compound raw material and a molten-salt raw material with each other, the metallic-compound raw material at least including one or more kinds of Mn-containing metallic compounds being selected from the group consisting of oxides, hydroxides and metallic salts that include one or more kinds of metallic elements in which Mn is essential, the molten-salt raw material including lithium hydroxide and lithium nitrate, and exhibiting a proportion of the lithium hydroxide with respect to the lithium nitrate (i.e., (Lithium Hydroxide)/(Lithium Nitrate)) that falls in a range of from 0.05 or more to less than 1 by molar ratio; a molten reaction step of reacting said raw-material mixture at from 300° C. or more to 550° C. or less by melting it: and a recovery step of recovering said composite oxide being generated from said raw-material mixture that has undergone the reaction.Type: GrantFiled: March 7, 2011Date of Patent: November 4, 2014Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Naoto Yasuda, Hitotoshi Murase, Ryota Isomura
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Patent number: 8822083Abstract: A negative electrode for a lithium-ion secondary battery, has a current collector and an active-material layer bound on a surface of the current collector. The active-material layer includes active materials, binders, conductive additives, and buffer materials. The active materials include Si and/or Sn, and the buffer materials comprise a silicone composite powder in which a spherical silicone-rubber powder is covered with a silicone resin.Type: GrantFiled: September 1, 2010Date of Patent: September 2, 2014Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Manabu Miyoshi, Hitotoshi Murase, Keiichi Hayashi, Shinji Suzuki
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Publication number: 20140186704Abstract: To provide a lithium ion secondary battery electrode in which a coated layer is held on a surface of an active material layer over a long period of time to suppress decomposition of the electrolysis solution and to enhance the cyclability, a manufacturing process for the same, and a lithium ion secondary battery using the electrode. A lithium ion secondary battery electrode includes a current collector, an active material layer containing a binder formed on a surface of the current collector, and a coated layer formed on the surface of at least a part of the active material layer, wherein the coated layer consists of an acrylic type copolymer cured substance comprising an acrylic type main chain and a side chain having polyester or polyether graft-polymerized to said acrylic type main chain and the coated layer is chemically bonded with the binder.Type: ApplicationFiled: May 2, 2012Publication date: July 3, 2014Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Junichi Niwa, Yuichi Hirakawa, Manabu Miyoshi, Keiichi Hayashi, Hitotoshi Murase
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Publication number: 20140106226Abstract: Provided is a negative-electrode active material, which is capable of constituting a lithium ion secondary cell exhibiting excellent cell characteristics. The negative-electrode active material for a lithium ion secondary cell of the invention includes a mixed material of silicon oxide particles composed of silicon oxide and rod-shaped iron oxide particles composed of iron oxide. It is preferable to use iron oxide particles having a plurality of pores in a surface, and an electrode reaction is effectively carried out.Type: ApplicationFiled: May 10, 2012Publication date: April 17, 2014Applicant: NATIONAL UNIVERSITY CORPORATION GUNMA UNIVERSITYInventors: Keiichi Hayashi, Manabu Miyoshi, Takayuki Hirose, Hitotoshi Murase, Hideyuki Morimoto, Shin-ichi Tobishima
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Publication number: 20140099542Abstract: To provide a lithium ion secondary battery electrode in which a coated layer is held on a surface of an active material layer over a long period of time to suppress decomposition of the electrolysis solution and to enhance the cyclability, a manufacturing process for the same, and a lithium ion secondary battery using the electrode. A lithium ion secondary battery electrode includes a current collector, an active material layer containing a binder formed on a surface of the current collector, and a coated layer formed on the surface of at least a part of the active material layer, wherein the coated layer contains a silicone-acrylic graft copolymer cured substance including an acrylic type main chain having a functional group and a side chain having a silicone graft-polymerized to the acrylic type main chain, and the coated layer is chemically bonded with the binder.Type: ApplicationFiled: May 2, 2012Publication date: April 10, 2014Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Junichi Niwa, Yuichi Hirakawa, Manabu Miyoshi, Keiichi Hayashi, Hitotoshi Murase
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Publication number: 20140093779Abstract: An object of the present invention is to provide a negative-electrode active material for lithium-ion secondary battery, negative-electrode active material which makes it possible for lithium-ion secondary batteries to exhibit higher capacities, and which makes it feasible to charge and discharge lithium-ion secondary batteries at a faster speed. In a production process according to the present invention, oxidized titanium fluoride is obtained by heating a mixed raw material, which includes a mixture of anatase-type TiO2 and hydrofluoric acid, at 70° C. or more (i.e., a heating step). This mixed raw material includes hydrogen fluoride in an amount exceeding 2 mol per the anatase-type TiO2 making 1 mol. When the oxidized titanium fluoride, which is obtained by this production process, is used as a negative-electrode active material of lithium-ion secondary battery, high-capacity and rapidly-chargeable/dischargeable lithium-ion secondary batteries are obtainable.Type: ApplicationFiled: November 5, 2013Publication date: April 3, 2014Applicants: Incorporated National University Iwate University, Kabushiki Kaisha Toyota JidoshokkiInventors: Seung-Taek MYUNG, Naoto YASUDA, Hitotoshi MURASE
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Publication number: 20140087252Abstract: To provide a lithium ion secondary battery electrode in which a coat is held on a surface of an active material layer over a long period of time to suppress decomposition of the electrolysis solution and to enhance the cyclability, a manufacturing process for the same, and a lithium ion secondary battery using the electrode. A lithium ion secondary battery electrode includes a current collector, an active material layer containing a binder formed on a surface of the current collector, and a coat containing modified polydimethylsiloxane formed on a surface of at least a part of the active material layer, wherein the coat is chemically bonded with the binder.Type: ApplicationFiled: April 19, 2012Publication date: March 27, 2014Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Yuichi Hirakawa, Manabu Miyoshi, Keiichi Hayashi, Hitotoshi Murase