Patents by Inventor Satoshi Hirahara
Satoshi Hirahara 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: 20240097194Abstract: A novel ionic liquid is provided. A highly safe secondary battery with high charge and discharge capacity is provided. The ionic liquid includes a cation represented by General Formula (G1) and an anion represented by Structural Formula (200). In the formula, X1 to X3 each independently represent any one of fluorine, chlorine, bromine, and iodine. One of X1 to X3 may be hydrogen. In addition, n and m each independently represent 0 to 5. Furthermore, a secondary battery including the above-described ionic liquid is provided.Type: ApplicationFiled: December 3, 2021Publication date: March 21, 2024Inventors: Kaori OGITA, Kazuya SHIMADA, Takashi HIRAHARA, Fumiko TANAKA, Shotaro MURATSUBAKI, Satoshi SEO
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Patent number: 7625839Abstract: Activated carbon adapted for electric double layer capacitors is provided, which capacitors can give a large power density per unit volume and which capacitors, even when charge-and-discharge cycle is repeated under a large current or a constant voltage is continuously applied for a long time, undergo less decrease in output density. In particular, the present invention relates to the activated carbon manufactured by carbonization of coconut shell, which has a BET specific surface area of 2000 m2/g to 2500 m2/g, an average pore diameter of 1.95 nm (19.5 ?) to 2.20 nm (22 ?) and a pore volume of pores having a pore diameter calculated according to a Cranston-Inkley method of 5.0 nm (50 ?) to 30.0 nm (300 ?), of 0.05 cm3/g to 0.15 cm3/g.Type: GrantFiled: June 21, 2006Date of Patent: December 1, 2009Assignees: Mitsubishi Chemical Corporation, Toyota Jidosha Kabushiki KaishaInventors: Satoshi Hirahara, Yositaka Takeda, Kazuyuki Toki
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Patent number: 7566515Abstract: A non-aqueous electrolyte secondary cell containing an electricity-generating element with at least a cathode, a separator and an anode and a non-aqueous electrolyte inside a cathode case, electrode units each consisting of the cathode and the anode opposite to each another via the separator laminated to form an electrode group, or an electrode unit in a sheet form consisting of the cathode and the anode opposite to each another via the separator wound to form an electrode group, or a sheet-shape cathode wrapped with the separator except for a part contacting at inner face of cathode case and a sheet-shaped anode set on the sheet-shaped cathode in a right angled position each other and bent alternately to form an electrode group, and the total sum of the areas of the opposing cathode and anode in the electrode group larger than the area of the opening of an insulating gasket in a sealed portion in the cathode case or than the area of an opening in a sealed plate in a sealed portion in the cathode case.Type: GrantFiled: July 8, 2005Date of Patent: July 28, 2009Assignee: Toshiba Battery Co., Ltd.Inventors: Masami Suzuki, Muneto Hayami, Kazuo Udagawa, Kazuo Iizuka, Naomi Ishihara, Satoshi Hirahara, Hirotaka Sakai, Kiyoto Yoda, Masataka Shikota
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Patent number: 7378186Abstract: In a flat non-aqueous electrolyte secondary cell comprising an electricity-generating element including at least a cathode, a separator and an anode and a non-aqueous electrolyte in the inside of a cathode case, a plurality of electrode units each consisting of the cathode and the anode opposite to each another via the separator are laminated to form an electrode group, or an electrode unit in a sheet form consisting of the cathode and the anode opposite to each another via the separator is wound to form an electrode group, or a sheet-shape cathode is wrapped with the separator except for a part contacting at inner face of cathode case and a sheet-shaped anode is set on the sheet-shaped cathode in a right angled position each other and then these cathode and anode are bent alternately to form an electrode group, and the total sum of the areas of the opposing cathode and anode in this electrode group is larger than the area of the opening of an insulating gasket in a sealed portion in the cathode case or thanType: GrantFiled: December 13, 2002Date of Patent: May 27, 2008Assignee: Toshiba Battery Co., Ltd.Inventors: Masami Suzuki, Muneto Hayami, Kazuo Udagawa, Kazuo Iizuka, Naomi Ishihara, Satoshi Hirahara, Hirotaka Sakai, Kiyoto Yoda, Masataka Shikota
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Publication number: 20060257720Abstract: The present invention provides a carbonaceous fiber woven fabric suitable for use as a gas diffusion layer material for solid polymer electrolyte fuel cells. Namely, the conductive carbonaceous fiber woven fabric of the present invention contains carbonaceous fiber yarns having a metric count of 16 to 120, a carbonaceous fiber content of at least 60% by weight, a weight per unit area of 50 to 150 g/m2, a woven cloth thickness of 0.05 to 0.33 mm, and an in-plane volume resistivity of no more than 0.1 ?cm.Type: ApplicationFiled: July 19, 2006Publication date: November 16, 2006Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Satoshi Hirahara, Mitsuo Suzuki
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Publication number: 20060240979Abstract: Activated carbon adapted for electric double layer capacitors is provided, which capacitors can give a large power density per unit volume and which capacitors, even when charge-and-discharge cycle is repeated under a large current or a constant voltage is continuously applied for a long time, undergo less decrease in output density. That is, the present invention relates to the activated carbon manufactured by carbonization of coconut shell, which has a BET specific surface area of 2000 m2/g to 2500 m2/g, an average pore diameter of 1.95 nm (19.5 ?) to 2.20 nm (22 ?) and a pore volume of pores having a pore diameter calculated according to a Cranston-Inkley method of 5.0 nm (50 ?) to 30.0 nm (300 ?), of 0.05 cm3/g to 0.15 cm3/g.Type: ApplicationFiled: June 21, 2006Publication date: October 26, 2006Applicants: MITSUBISHI CHEMICAL CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Satoshi Hirahara, Yositaka Takeda, Kazuyuki Toki
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Patent number: 7091156Abstract: Activated carbon adapted for electric double layer capacitors is provided, which capacitors can give a large power density per unit volume and which capacitors, even when charge-and-discharge cycle is repeated under a large current or a constant voltage is continuously applied for a long time, undergo less decrease in output density. That is, the present invention relates to the activated carbon manufactured by carbonization of coconut shell, which has a BET specific surface area of 2000 m2/g to 2500 m2/g, an average pore diameter of 1.95 nm (19.5 ?) to 2.20 nm (22 ?) and a pore volume of pores having a pore diameter calculated according to a Cranston-Inkley method of 5.0 nm (50 ?) to 30.0 nm (300 ?), of 0.05 cm3/g to 0.15 cm3/g.Type: GrantFiled: January 9, 2002Date of Patent: August 15, 2006Assignees: Mitsubishi Chemical Corporation, Toyota Jidosha Kabushiki KaishaInventors: Satoshi Hirahara, Yositaka Takeda, Kazuyuki Toki
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Publication number: 20050271938Abstract: In a flat non-aqueous electrolyte secondary cell comprising an electricity-generating element including at least a cathode, a separator and an anode and a non-aqueous electrolyte in the inside of a cathode case, a plurality of electrode units each consisting of the cathode and the anode opposite to each another via the separator are laminated to form an electrode group, or an electrode unit in a sheet form consisting of the cathode and the anode opposite to each another via the separator is wound to form an electrode group, or a sheet-shape cathode is wrapped with the separator except for a part contacting at inner face of cathode case and a sheet-shaped anode is set on the sheet-shaped cathode in a right angled position each other and then these cathode and anode are bent alternately to form an electrode group, and the total sum of the areas of the opposing cathode and anode in this electrode group is larger than the area of the opening of an insulating gasket in a sealed portion in the cathode case or thanType: ApplicationFiled: July 8, 2005Publication date: December 8, 2005Applicant: TOSHIBA BATTERY CO., LTD.Inventors: Masami Suzuki, Muneto Hayami, Kazuo Udagawa, Kazuo Iizuka, Naomi Ishihara, Satoshi Hirahara, Hirotaka Sakai, Kiyoto Yoda, Masataka Shikota
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Publication number: 20050260909Abstract: An objective of the invention is to suppress a loosening of strands at both ends of a carbonic fiber woven fabric which is generated as a result of a repetitive rolling and unrolling. The present invention is to conduct an anti-loosening treatment of carbonic fiber strand by means of cutting both ends of a carbonic fiber woven fabric consisting of carbonic fiber strand into the serrate or wavy form so that the ratio (t/l) of the transverse length (t) of the woven fabric to the longitudinal length (l) of the woven fabric becomes 0.2 to 5.Type: ApplicationFiled: March 25, 2005Publication date: November 24, 2005Applicant: MITSUBISHI CHEMICAL CORPORATIONInventor: Satoshi Hirahara
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Publication number: 20030209428Abstract: The present invention provides a carbonaceous fiber woven fabric suitable for use as a gas diffusion layer material for solid polymer electrolyte fuel cells. Namely, the conductive carbonaceous fiber woven fabric of the present invention contains carbonaceous fiber yarns having a metric count of 16 to 120, a carbonaceous fiber content of at least 60% by weight, a weight per unit area of 50 to 150 gm2, a woven cloth thickness of 0.05 to 0.33 mm, and an in-plane volume resistivity of no more than 0.1 &OHgr;cm.Type: ApplicationFiled: March 13, 2003Publication date: November 13, 2003Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Satoshi Hirahara, Mitsuo Suzuki
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Publication number: 20030138693Abstract: In a flat non-aqueous electrolyte secondary cell comprising an electricity-generating element including at least a cathode, a separator and an anode and a non-aqueous electrolyte in the inside of a cathode case, a plurality of electrode units each consisting of the cathode and the anode opposite to each another via the separator are laminated to form an electrode group, or an electrode unit in a sheet form consisting of the cathode and the anode opposite to each another via the separator is wound to form an electrode group, or a sheet-shape cathode is wrapped with the separator except for a part contacting at inner face of cathode case and a sheet-shaped anode is set on the sheet-shaped cathode in a right angled position each other and then these cathode and anode are bent alternately to form an electrode group, and the total sum of the areas of the opposing cathode and anode in this electrode group is larger than the area of the opening of an insulating gasket in a sealed portion in the cathode case or thanType: ApplicationFiled: December 13, 2002Publication date: July 24, 2003Applicant: TOSHIBA BATTERY CO., LTD.Inventors: Masami Suzuki, Muneto Hayami, Kazuo Udagawa, Kazuo Iizuka, Naomi Ishihara, Satoshi Hirahara, Hirotaka Sakai, Kiyoto Yoda, Masataka Shikota
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Patent number: 6521373Abstract: In a flat non-aqueous electrolyte secondary cell comprising an electricity-generating element including at least a cathode, a separator and an anode and a non-aqueous electrolyte in the inside of a cathode case, a plurality of electrode units each consisting of the cathode and the anode opposite to each another via the separator are laminated to form an electrode group, or an electrode unit in a sheet form consisting of the cathode and the anode opposite to each another via the separator is wound to form an electrode group, or a sheet-shape cathode is wrapped with the separator except for a part contacting at inner face of cathode case and a sheet-shaped anode is set on the sheet-shaped cathode in a right angled position each other and then these cathode and anode are bent alternately to form an electrode group, and the total sum of the areas of the opposing cathode and anode in this electrode group is larger than the area of the opening of an insulating gasket in a sealed portion in the cathode case or thanType: GrantFiled: August 17, 2000Date of Patent: February 18, 2003Assignee: Toshiba Battery Co., Ltd.Inventors: Masami Suzuki, Muneto Hayami, Kazuo Udagawa, Kazuo Iizuka, Naomi Ishihara, Satoshi Hirahara, Hirotaka Sakai, Kiyoto Yoda, Masataka Shikota
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Publication number: 20020160252Abstract: A conductive carbonaceous-fiber sheet has a thickness of from 0.05 to 1 mm, a weight per a unit area of from 60 to 250 g/m2, a bending resistance (L) as determined by the 45° Cantilever method of 6 cm or higher and an in-plane volume resistivity of 0.2 &OHgr;cm or lower, and is suitable for use as a gas diffusion layer in a solid polymer electrolyte fuel cell.Type: ApplicationFiled: February 27, 2002Publication date: October 31, 2002Applicant: Mitsubishi Chemical CorporationInventors: Satoshi Hirahara, Mitsuo Suzuki
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Publication number: 20020114126Abstract: Activated carbon adapted for electric double layer capacitors is provided, which capacitors can give a large power density per unit volume and which capacitors, even when charge-and-discharge cycle is repeated under a large current or a constant voltage is continuously applied for a long time, undergo less decrease in output density.Type: ApplicationFiled: January 9, 2002Publication date: August 22, 2002Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Satoshi Hirahara, Yoshitaka Takeda, Kazuyuki Toki
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Patent number: 6094338Abstract: Electric double-layer capacitor are disclosed having a non-aqueous solvent electrolyte; and a pair of polarized electrodes as positive and negative electrodes. These polarized electrodes have a rest potential nearly central between a substantial decomposition initiation voltage of the electrolyte on an oxidation or high-potential side and a substantial decomposition initiation voltage of the electrolyte on a reduction or low-potential side.Type: GrantFiled: July 8, 1998Date of Patent: July 25, 2000Assignee: Mitsubishi Chemical CorporationInventors: Satoshi Hirahara, Kohei Okuyama, Mitsuo Suzuki, Kazushi Matsuura
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Patent number: 6064560Abstract: Active carbon of which the pore size distribution as measured by a Cranston-Inkley method has a peak within each of ranges of from 10 to 20 .ANG. and from 20 to 100 .ANG..Type: GrantFiled: April 1, 1997Date of Patent: May 16, 2000Assignee: Mitsubishi Chemicals CorporationInventors: Satoshi Hirahara, Mitsuo Suzuki, Kohei Okuyama
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Patent number: 5965479Abstract: The present invention relates to an activated carbon comprising an activated carbon particle and titanium dioxide fine particles present at least on the surface thereof, which activated carbon contains substantially no carbon precursor on the surface thereof and has the lightness L value thereof of not more than 50.Type: GrantFiled: August 1, 1997Date of Patent: October 12, 1999Assignee: Mitsubishi Chemical CorporationInventors: Mitsuo Suzuki, Hiroyuki Aikyo, Satoshi Hirahara, Kazushi Matsuura, Kohei Okuyama