Patents by Inventor Yasushi Muranaka
Yasushi Muranaka 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: 7416814Abstract: A lithium secondary battery, which comprises a positive electrode, a negative electrode containing a lithium ion-storable/dischargeable negative electrode-active material and a lithium ion conductive, non-aqueous electrolytic solution or polymer electrolyte can have distinguished charging/discharging characteristics and a higher safety, when the negative electrode material contains particles comprising carbonaceous materials and at least one of elements capable of forming a compound with Li; the elements have a melting point of at least 900° C. and a thermal expansion coefficient of not more than 9 ppm/K at room temperature; the particles are embedded in a plurality of layers of the carbonaceous materials; the particles being subjected to a mechanical treatment to make particle sizes of the particles smaller than the initial particle size in advance.Type: GrantFiled: December 31, 2002Date of Patent: August 26, 2008Assignees: Hitachi, Ltd., Hitachi Chemical Co., Ltd.Inventors: Junya Kaneda, Noriyuki Watanabe, Yasuhisa Aono, Seiji Takeuchi, Yasushi Muranaka, Kouichi Takei
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Patent number: 7273681Abstract: Objects of the present invention is to provide a carbon material having a superior reversibility in lithium intercalation-deintercalation reaction, and a non-aqueous secondary battery using the carbon material as an active material for a negative electrode, which has a high energy density and an excellent rapid charging and discharging characteristics. Graphite powder having a maximum particle diameter of less than 100 ?m and an existing fraction of rhombohedral structure in the crystalline structure of less than 20% is used as an active material for the negative electrode of the non-aqueous secondary battery. The graphite powder can be obtained by pulverizing raw graphite with a jet mill, and subsequently treating the powder at a temperature equal to or higher than 900° C.Type: GrantFiled: March 18, 2004Date of Patent: September 25, 2007Assignee: Hitachi, Ltd.Inventors: Hidetoshi Honbo, Seiji Takeuchi, Hideto Momose, Tatsuo Horiba, Yasushi Muranaka, Yoshito Ishii
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Publication number: 20070178344Abstract: An electronic apparatus includes a power generation panel having a film/electrode assembly formed by joining an electrolyte film, an anode electrode and a cathode electrode, and a fuel supply layer for supplying fuel to the film/electrode assembly. The electronic apparatus further includes a main body having a semiconductor circuit for performing operational processing, and a cover member for covering the main body. When a power supply for the electronic apparatus is turned on, a space is provided between the power generation panel and the main body.Type: ApplicationFiled: March 5, 2007Publication date: August 2, 2007Inventors: Akira Tanaka, Tomoichi Kamo, Yasushi Muranaka
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Patent number: 7201989Abstract: An electronic device is provided with a fuel cell which is formed to introduce air from at least two surfaces of a casing of the fuel cell and to supply a fuel from an inside of the casing for high energy efficiency. The fuel cell is structured to form an air-supply space between the fuel cell and the electronic device and mounted in a manner that the surface of the fuel cell, which is on a reverse side of the surface facing the electronic device, is exposed to the ambient air. The electronic device is provided with a fuel cell structured to supply air from at least two surfaces of the casing to achieve better energy efficiency.Type: GrantFiled: July 21, 2003Date of Patent: April 10, 2007Assignee: Hitachi, Ltd.Inventors: Akira Tanaka, Tomoichi Kamo, Yasushi Muranaka
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Publication number: 20060228630Abstract: Objects of the present invention is to provide a carbon material having a superior reversibility in lithium intercalation-deintercalation reaction, and a non-aqueous secondary battery using the carbon material as an active material for a negative electrode, which has a high energy density and an excellent rapid charging and discharging characteristics. Graphite powder having a maximum particle diameter of less than 100 ?m and an existing fraction of rhombohedral structure in the crystalline structure of less than 20% is used as an active material for the negative electrode of the non-aqueous secondary battery. The graphite powder can be obtained by pulverizing raw graphite with a jet mill, and subsequently treating the powder at a temperature equal to or higher than 900° C.Type: ApplicationFiled: June 8, 2006Publication date: October 12, 2006Inventors: Hidetoshi Honbo, Seiji Takeuchi, Hideto Momose, Tatsuo Horiba, Yasushi Muranaka, Yoshito Ishii
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Patent number: 7083876Abstract: A lead-acid battery superior in high-efficiency charging characteristic to conventional lead-acid batteries and a carbon material used in the lead-acid battery having excellent charge acceptability are disclosed. The lead-acid battery uses, as an additive to the anode active material, a simple substance and/or compound thereof, both having a catalysis for desulfurization or a catalyst for SOx oxidation by adding to, or loading on, a carbon material such as active carbon, carbon black, or the like. When the lead-acid battery with an anode containing carbon material is applied to electric cars, various hybrid cars, power storage systems, elevators, electromotive tools and power source systems such as uninterruptible power source, distributed power source and the like, all having high input and output requirements, stable control can be obtained.Type: GrantFiled: March 13, 2002Date of Patent: August 1, 2006Assignees: Hitachi, Ltd., Shin-Kobe Electric Machinery Co., Ltd.Inventors: Kyoko Honbo, Eiji Hoshi, Yasushi Muranaka, Seiji Takeuchi
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Publication number: 20050208377Abstract: Objects of the present invention is to provide a carbon material having a superior reversibility in lithium intercalation-deintercalation reaction, and a non-aqueous secondary battery using the carbon material as an active material for a negative electrode, which has a high energy density and an excellent rapid charging and discharging characteristics. Graphite powder having a maximum particle diameter of less than 100 ?m and an existing fraction of rhombohedral structure in the crystalline structure of less than 20% is used as an active material for the negative electrode of the non-aqueous secondary battery. The graphite powder can be obtained by pulverizing raw graphite with a jet mill, and subsequently treating the powder at a temperature equal to or higher than 900° C.Type: ApplicationFiled: May 10, 2005Publication date: September 22, 2005Inventors: Hidetoshi Honbo, Seiji Takeuchi, Hideto Momose, Tatsuo Horiba, Yasushi Muranaka, Yoshito Ishii
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Patent number: 6835215Abstract: Provided is a carbon material having a superior reversibility in lithium intercalation-deintercalation reaction, and a non-aqueous secondary battery using the carbon material as an active material for a negative electrode, which has a high energy density and an excellent rapid charging and discharging characteristics. Graphite powder having a maximum particle diameter of less than 100 &mgr;m and an existing reaction of rhombohedral structure in the crystalline structure of less than 20% is used as an active material for the negative electrode of the non-aqueous secondary battery. The graphite powder can be obtained by pulverizing raw graphite with a jet mill, and subsequently treating the powder at a temperature equal to or higher than 900°C.Type: GrantFiled: December 19, 2001Date of Patent: December 28, 2004Assignee: Hitachi, Ltd.Inventors: Hidetoshi Honbo, Seiji Takeuchi, Hideto Momose, Tatsuo Horiba, Yasushi Muranaka, Yoshito Ishii
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Publication number: 20040180264Abstract: The present invention provides a lead-acid battery superior in high-efficiency charging characteristic to conventional lead-acid batteries; and a carbon material used in the lead-acid battery, having excellent charge acceptability. That is, the present invention provides a lead-acid battery which uses, as an additive to the anode active material, a simple substance and/or a compound thereof, both having a catalysis for desulfurization or a catalysis for SOx oxidation by adding to or loading on a carbon material such as active carbon, carbon black or the like and thereby has superior high-efficiency charging characteristic and improved charging acceptability.Type: ApplicationFiled: March 30, 2004Publication date: September 16, 2004Inventors: Kyoko Honbo, Eiji Hoshi, Yasushi Muranaka, Seiji Takeuchi
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Publication number: 20040175619Abstract: Objects of the present invention is to provide a carbon material having a superior reversibility in lithium intercalation-deintercalation reaction, and a non-aqueous secondary battery using the carbon material as an active material for a negative electrode, which has a high energy density and an excellent rapid charging and discharging characteristics.Type: ApplicationFiled: March 18, 2004Publication date: September 9, 2004Inventors: Hidetoshi Honbo, Seiji Takeuchi, Hideto Momose, Tatsuo Horiba, Yasushi Muranaka, Yoshito Ishii
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Publication number: 20040175620Abstract: Objects of the present invention is to provide a carbon material having a superior reversibility in lithium intercalation-deintercalation reaction, and a non-aqueous secondary battery using the carbon material as an active material for a negative electrode, which has a high energy density and an excellent rapid charging and discharging characteristics.Type: ApplicationFiled: March 18, 2004Publication date: September 9, 2004Inventors: Hidetoshi Honbo, Seiji Takeuchi, Hideto Momose, Tatsuo Horiba, Yasushi Muranaka, Yoshito Ishii
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Publication number: 20040068671Abstract: An electronic device is provided with a fuel cell which is formed to introduce air from at least two surfaces of a casing of the fuel cell and to supply a fuel from an inside of the casing for high energy efficiency. The fuel cell is structured to form an air-supply space between the fuel cell and the electronic device and mounted in a manner that the surface of the fuel cell, which is on a reverse side of the surface facing the electronic device, is exposed to the ambient air. The electronic device is provided with a fuel cell structured to supply air from at least two surfaces of the casing to achieve better energy efficiency.Type: ApplicationFiled: July 21, 2003Publication date: April 8, 2004Inventors: Akira Tanaka, Tomoichi Kamo, Yasushi Muranaka
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Publication number: 20030235760Abstract: The present invention provides a lead-acid storage battery characterized by excellent characteristics in high percentage charge percentage by improving the conductivity of lead sulfate and its solubility into lead and ensuring smooth charging reaction of anode activator, and a carbon material characterized by excellent chargeability for providing the aforementioned lead-acid storage battery.Type: ApplicationFiled: March 19, 2003Publication date: December 25, 2003Applicants: Hitachi, Ltd., Shin-Kobe Electric Machinery Co., LtdInventors: Eiji Hoshi, Kyoko Honbo, Yasushi Muranaka, Seiji Takeuchi
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Patent number: 6638662Abstract: A lithium secondary battery comprising a positive electrode, a negative electrode containing a lithium ion-storable/dischargeable negative electrode-active material and a lithium ion conductive, non-aqueous electrolytic solution or polymer electrolyte, characterized in that the negative electrode-active material comprises particles of carbonaceous material and particles of metal and metal oxide capable of enhancing lithium ion interstitial diffusibility/releasability as embedded in the particles of carbonaceous material, particles of carbonaceous materials and lithium ion interstitially diffusible/releasable particles being prepared by carbonization of a mixture thereof with MA or carbon precursor, has a high capacity and a long cycle life, and can be used in various electric appliances.Type: GrantFiled: February 16, 2000Date of Patent: October 28, 2003Assignee: Hitachi, Ltd.Inventors: Junya Kaneda, Seiji Takeuchi, Noriyuki Watanabe, Takahiro Yamaki, Yasushi Muranaka, Yasuhisa Aono
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Publication number: 20030129494Abstract: A lithium secondary battery comprising a positive electrode, a negative electrode containing a lithium ion-storable/dischargeable negative electrode-active material and a lithium ion conductive, non-aqueous electrolytic solution or polymer electrolyte, characterized in that the negative electrode-active material comprises particles of carbonaceous material and particles of metal and metal oxide capable of enhancing lithium ion interstitial diffusibility/releasability as embedded in the particles of carbonaceous material, particles of carbonaceous materials and lithium ion interstitially diffusible/releasable particles being prepared by carbonization of a mixture thereof with MA or carbon precursor, has a high capacity and a long cycle life, and can be used in various electric appliances.Type: ApplicationFiled: February 16, 2000Publication date: July 10, 2003Inventors: Junya Kaneda, Seiji Takeuchi, Noriyuki Watanabe, Takahiro Yamaki, Yasushi Muranaka, Yasuhisa Aono
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Publication number: 20030091901Abstract: A lithium secondary battery, which comprises a positive electrode, a negative electrode containing a lithium ion-storable/dischargeable negative electrode-active material and a lithium ion conductive, non-aqueous electrolytic solution or polymer electrolyte can have distinguished charging/discharging characteristics and a higher safety, when the negative electrode material contains particles comprising carbonaceous materials and at least one of elements capable of forming a compound with Li; the elements have a melting point of at least 900° C. and a thermal expansion coefficient of not more than 9 ppm/K at room temperature; the particles are embedded in a plurality of layers of the carbonaceous materials; the particles being subjected to a mechanical treatment to make particle sizes of the particles smaller than the initial particle size in advance.Type: ApplicationFiled: December 31, 2002Publication date: May 15, 2003Inventors: Junya Kaneda, Noriyuki Watanabe, Yasuhisa Aono, Seiji Takeuchi, Yasushi Muranaka, Kouichi Takei
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Publication number: 20030049528Abstract: The present invention provides a lead-acid battery superior in high-efficiency charging characteristic to conventional lead-acid batteries; and a carbon material used in the lead-acid battery, having excellent charge acceptability. That is, the present invention provides a lead-acid battery which uses, as an additive to the anode active material, a simple substance and/or a compound thereof, both having a catalysis for desulfurization or a catalysis for SOX oxidation by adding to or loading on a carbon material such as active carbon, carbon black or the like and thereby has superior high-efficiency charging characteristic and improved charging acceptability.Type: ApplicationFiled: March 13, 2002Publication date: March 13, 2003Inventors: Kyoko Honbo, Eiji Hoshi, Yasushi Muranaka, Seiji Takeuchi
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Patent number: 6524749Abstract: A lithium secondary battery, which comprises a positive electrode, a negative electrode containing a lithium ion-storable/dischargeable negative electrode-active material and a lithium ion conductive, non-aqueous electrolytic solution or polymer electrolyte can have distinguished charging/discharging characteristics and a higher safety, when the negative electrode material contains particles comprising carbonaceous materials and at least one of elements capable of forming a compound with Li; the elements have a melting point of at least 900° C. and a thermal expansion coefficient of not more than 9 ppm/K at room temperature; the particles are embedded in a plurality of layers of the carbonaceous materials; the particles being subjected to a mechanical treatment to make particle sizes of the particles smaller than the initial particle size in advance.Type: GrantFiled: January 13, 2000Date of Patent: February 25, 2003Assignees: Hitachi, Ltd., Hitachi Chemical Co., Ltd.Inventors: Junya Kaneda, Noriyuki Watanabe, Yasuhisa Aono, Seiji Takeuchi, Yasushi Muranaka, Kouichi Takei
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Patent number: 6458488Abstract: A lithium secondary battery characterized by a high power capacity and a long service life has a negative electrode 3, a positive electrode 2 and a non-aqueous electrolyte containing lithium salt. The lithium secondary battery is characterized by further comprising multiple oxide represented by a general formula Lix+aMn2−a−bMbQcO4+d (where M denotes at least one element selected from among Ni, Fe, Co, Cu and Cr; Q denotes at least one element selected from among C, N, S, P, Si, F, Cl, I and Br; and x, a, b, c and d are within the range of 0≦x≦) 1.1, 0≦a≦0.5, 0.05≦b≦1.0, 0.000001≦c<0.05 and 0≦d≦0.1, respectively) as a positive electrode activator.Type: GrantFiled: October 13, 2000Date of Patent: October 1, 2002Assignee: Hitachi, Ltd.Inventors: Kyoko Honbo, Akihiro Gotoh, Masahiro Kasai, Yasushi Muranaka, Yoshiji Hotta
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Patent number: 6383467Abstract: Objects of the present invention is to provide a carbon material having a superior reversibility in lithium intercalation-deintercalation reaction, and a non-aqueous secondary battery using the carbon material as an active material for a negative electrode, which has a high energy density and an excellent rapid charging and discharging characteristics. Graphite powder having a maximum particle diameter of less than 100 &mgr;m and an existing fraction of rhombohedral structure in the crystalline structure of less than 20% is used as an active material for the negative electrode of the non-aqueous secondary battery. The graphite powder can be obtained by pulverizing raw graphite with a jet mill, and subsequently treating the powder at a temperature equal to or higher than 900° C.Type: GrantFiled: December 28, 1999Date of Patent: May 7, 2002Assignee: Hitachi, Ltd.Inventors: Hidetoshi Honbo, Seiji Takeuchi, Hideto Momose, Tatsuo Horiba, Yasushi Muranaka, Yoshito Ishii