Patents by Inventor Kei Shimamoto
Kei Shimamoto 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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NEGATIVE ELECTRODE ACTIVE MATERIAL COMPOSITION, AND ALL-SOLID-STATE SECONDARY BATTERY INCLUDING SAME
Publication number: 20240113291Abstract: Provided is a negative electrode active material composition including a lithium titanate powder whose main component is Li4Ti5O12 and an inorganic solid electrolyte having conductivity for metal ions belonging to Group 1 of Periodic Table, wherein at least one metal element selected from the group consisting of Al, W, Ce, and Mo is present on the surfaces of lithium titanate particles constituting the lithium titanate powder.Type: ApplicationFiled: February 3, 2022Publication date: April 4, 2024Applicant: UBE CorporationInventors: Kei SHIMAMOTO, Shinichirou OOTANI, Takumi TAKENAKA -
Nonaqueous electrolyte, capacitor device using same, and carboxylic acid ester compound used in same
Patent number: 11695158Abstract: The present invention provides a nonaqueous electrolytic solution capable of improving electrochemical characteristics in the case of using an energy storage device at a high temperature and at a high voltage and further capable of inhibiting the gas generation while maintaining a capacity retention rate after storage at a high temperature and at a high voltage and also provides an energy storage device using the same. Disclosed is a nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, the nonaqueous electrolytic solution containing a carboxylic acid ester compound represented by the following general formula (I). In the formula, each of R1 and R2 independently represents a hydrogen atom, a —C(?O)—OR4 group, or the like, and R1 and R2 may be bonded to each other to form a ring structure. R3 represents a hydrogen atom or the like, and n represents an integer of 1 to 3.Type: GrantFiled: February 17, 2021Date of Patent: July 4, 2023Assignee: MU IONIC SOLUTIONS CORPORATIONInventors: Kei Shimamoto, Koji Abe, Shoji Shikita, Kazuhiro Miyoshi -
Publication number: 20230178808Abstract: There is provided a nonaqueous electrolytic solution for an energy storage device which is a nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent and contains a phosphonate represented by the following general formula (I), and an energy storage device using the same: wherein, R1 represents an alkenyl group having 2 to 6 carbon atoms or an alkynyl group having 3 to 6 carbon atoms, and R2 and R3 each independently represent an alkynyl group having 3 to 6 carbon atoms.Type: ApplicationFiled: January 26, 2023Publication date: June 8, 2023Applicant: MU Ionic Solutions CorporationInventors: Taiki KIDO, Yoshiki KURIHARA, Hiroyuki SETOGUCHI, Kei SHIMAMOTO
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Publication number: 20220085377Abstract: A lithium ion secondary battery includes: a positive electrode having a positive electrode active material layer on a surface of a positive electrode collector; a negative electrode a having a negative electrode active material layer on a surface of a negative electrode collector; and a nonaqueous electrolyte. The positive electrode, the negative electrode, and the nonaqueous electrolyte are accommodated in a battery case. The nonaqueous electrolyte contains ?-butyrolactone as a main component of a nonaqueous solvent. A monoalkyl sulfate ion-derived coat is formed on the surface of the positive electrode active material layer. A VC-derived coat is formed on the surface of the negative electrode active material layer.Type: ApplicationFiled: September 9, 2021Publication date: March 17, 2022Inventors: Kei SHIMAMOTO, Takao FUKUNAGA, Hideyuki SUGIYAMA, Wataru MASUDA, Hiroki FUJITA, Munetaka HIGUCHI
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NONAQUEOUS ELECTROLYTE, CAPACITOR DEVICE USING SAME, AND CARBOXYLIC ACID ESTER COMPOUND USED IN SAME
Publication number: 20210320334Abstract: The present invention provides a nonaqueous electrolytic solution capable of improving electrochemical characteristics in the case of using an energy storage device at a high temperature and at a high voltage and further capable of inhibiting the gas generation while maintaining a capacity retention rate after storage at a high temperature and at a high voltage and also provides an energy storage device using the same. Disclosed is a nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, the nonaqueous electrolytic solution containing a carboxylic acid ester compound represented by the following general formula (I). In the formula, each of R1 and R2 independently represents a hydrogen atom, a —C(?O)—OR4 group, or the like, and R1 and R2 may be bonded to each other to form a ring structure. R3 represents a hydrogen atom or the like, and n represents an integer of 1 to 3.Type: ApplicationFiled: February 17, 2021Publication date: October 14, 2021Applicant: MU IONIC SOLUTIONS CORPORATIONInventors: Kei SHIMAMOTO, Koji ABE, Shoji SHIKITA, Kazuhiro MIYOSHI -
Publication number: 20210119255Abstract: Disclosed is a non-aqueous electrolytic solution for an energy storage device, including a non-aqueous solvent, an electrolyte salt, a first additive consisting of a sulfolane compound represented by the following formula (1), and a second additive which is at least one selected from the group consisting of a cyclic sulfuric ester compound represented by the following formula (2a) and a dinitrile compound represented by the following formula (2b):Type: ApplicationFiled: May 21, 2019Publication date: April 22, 2021Applicants: MU IONIC SOLUTIONS CORPORATION, SUMITOMO SEIKA CHEMICALS CO., LTD.Inventors: Masahide KONDO, Kei SHIMAMOTO
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Publication number: 20210083296Abstract: A lithium ion secondary battery includes: a positive electrode having a positive electrode active material layer on a surface of a positive electrode collector; a negative electrode having a negative electrode active material layer on a surface of a negative electrode collector; and a nonaqueous electrolyte. The positive electrode, the negative electrode, and the nonaqueous electrolyte are accommodated in a battery case. The nonaqueous electrolyte contains ?-butyrolactone as a main component of a nonaqueous solvent. A BOB ion-derived coat is formed on the surface of the positive electrode active material layer. A VC-derived coat is formed on the surface of the negative electrode active material layer.Type: ApplicationFiled: September 4, 2020Publication date: March 18, 2021Inventors: Kei SHIMAMOTO, Takao FUKUNAGA, Hideyuki SUGIYAMA, Wataru MASUDA, Hiroki FUJITA, Munetaka HIGUCHI
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Patent number: 10868336Abstract: The present invention provides a non-aqueous electrolytic solution for a lithium secondary battery or a lithium ion capacitor, wherein the non-aqueous electrolytic solution includes a lithium salt as dissolved in a non-aqueous solvent in a concentration of 0.8 to 1.5 M (mol/L), the non-aqueous solvent includes, in relation to the whole of the non-aqueous solvent, 5 to 25% by volume of ethylene carbonate, 5 to 25% by volume of propylene carbonate, 20 to 30% by volume of dimethyl carbonate, 20 to 40% by volume of methyl ethyl carbonate, and 10 to 20% by volume of a fluorinated chain ester; the total content of ethylene carbonate and propylene carbonate in the non-aqueous solvent is 20 to 30% by volume, the total content of dimethyl carbonate and the fluorinated chain ester in the non-aqueous solvent is 30 to 40% by volume; and the flash point of the non-aqueous electrolytic solution is 20° C. or higher, and the present invention also provides an energy storage device.Type: GrantFiled: September 29, 2016Date of Patent: December 15, 2020Assignee: UBE INDUSTRIES, LTD.Inventors: Koji Abe, Makoto Babazono, Masahide Kondo, Hiroshi Yanagi, Kei Shimamoto
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Patent number: 10535867Abstract: The present teaching provides a non-aqueous electrolyte secondary battery provided with a non-aqueous electrolyte solution having a composition able to achieve high battery performance even in an extremely low temperature region (for example, ?30° C. or lower). The non-aqueous electrolyte solution disclosed herein contains, as non-aqueous solvents, ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC) and ethyl propionate (EP), and when the total volume of the non-aqueous solvents is 100 vol. %, the content of EC is 20 to 30 vol. %, the content of PC is 5 to 10 vol. %, the content of EP is 5 to 10 vol. %, and the content of DMC+EMC is 50 to 70 vol. %.Type: GrantFiled: January 12, 2018Date of Patent: January 14, 2020Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kenta Ishii, Ryosuke Ohsawa, Koji Abe, Kei Shimamoto, Makoto Babazono
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NONAQUEOUS ELECTROLYTE, CAPACITOR DEVICE USING SAME, AND CARBOXYLIC ACID ESTER COMPOUND USED IN SAME
Publication number: 20190198928Abstract: The present invention provides a nonaqueous electrolytic solution capable of improving electrochemical characteristics in the case of using an energy storage device at a high temperature and at a high voltage and further capable of inhibiting the gas generation while maintaining a capacity retention rate after storage at a high temperature and at a high voltage and also provides an energy storage device using the same. Disclosed is a nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, the nonaqueous electrolytic solution containing a carboxylic acid ester compound represented by the following general formula (I). In the formula, each of R1 and R2 independently represents a hydrogen atom, a —C(?O)—OR4 group, or the like, and R1 and R2 may be bonded to each other to form a ring structure. R3 represents a hydrogen atom or the like, and n represents an integer of 1 to 3.Type: ApplicationFiled: February 27, 2019Publication date: June 27, 2019Applicant: UBE INDUSTRIES, LTD.Inventors: Kei Shimamoto, Koji Abe, Shoji Shikita, Kazuhiro Miyoshi -
Patent number: 10263287Abstract: Provided are a nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, the electrolyte salt including at least one first lithium salt selected from LiPF6, LiBF4, LiN(SO2F)2, LiN(SO2CF3)2, and LiN(SO2C2F5)2, and at least one second lithium salt selected from a lithium salt having an oxalate structure, a lithium salt having a phosphate structure, and a lithium salt having an S?O group, with a sum total of the first lithium salt and the second lithium salt being four or more, and an energy storage device using the same. This nonaqueous electrolytic solution is not only able to improve electrochemical characteristics at a high temperature and much more improve a discharge capacity retention rate and low-temperature output characteristics after a high-temperature storage test but also able to improve low-temperature input characteristics even for high-density electrodes.Type: GrantFiled: July 13, 2015Date of Patent: April 16, 2019Assignee: UBE INDUSTRIES, LTD.Inventors: Koji Abe, Kei Shimamoto
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Nonaqueous electrolyte, capacitor device using same, and carboxylic acid ester compound used in same
Patent number: 10263285Abstract: The present invention provides a nonaqueous electrolytic solution capable of improving electrochemical characteristics in the case of using an energy storage device at a high temperature and at a high voltage and further capable of inhibiting the gas generation while maintaining a capacity retention rate after storage at a high temperature and at a high voltage and also provides an energy storage device using the same. Disclosed is a nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, the nonaqueous electrolytic solution containing a carboxylic acid ester compound represented by the following general formula (I). In the formula, each of R1 and R2 independently represents a hydrogen atom, a —C(?O)—OR4 group, or the like, and R1 and R2 may be bonded to each other to form a ring structure. R3 represents a hydrogen atom or the like, and n represents an integer of 1 to 3.Type: GrantFiled: December 17, 2014Date of Patent: April 16, 2019Assignee: UBE INDUSTRIES, LTD.Inventors: Kei Shimamoto, Koji Abe, Shoji Shikita, Kazuhiro Miyoshi -
Patent number: 10164293Abstract: Disclosed are a non-aqueous electrolytic solution, which can improve cycle characteristics when a power storage device is used at high temperature and high voltage, and a power device using the same. The non-aqueous electrolytic solution according to the present invention comprises, in addition to a non-aqueous solvent and an electrolyte salt dissolved therein, a compound represented by the following formula (I): wherein n is an integer of 1 or 2; and when n is 1, L represents a straight or branched unsaturated hydrocarbon group of which at least one hydrogen atom is optionally substituted by a halogen atom, a cycloalkyl group of which at least one hydrogen atom is optionally substituted by a halogen atom, or an aryl group of which at least one hydrogen atom is optionally substituted by a halogen atom; and when n is 2, L represents a saturated or unsaturated divalent hydrocarbon group which optionally contains ether bond(s), or an arylene group.Type: GrantFiled: May 28, 2015Date of Patent: December 25, 2018Assignee: UBE INDUSTRIES, LTD.Inventors: Koji Abe, Kei Shimamoto, Shoji Shikita
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Patent number: 10093688Abstract: A nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, containing a compound of formula (X): where R10 and R20 are each a group selected from an alkyl having 1 to 8 carbon atoms, an alkenyl having 2 to 6 carbon atoms, an alkynyl having 3 to 6 carbon atoms, and an aryl having 6 to 12 carbon atoms, or a lithium; and X is a polar group (i) containing a —C(?O), a —P(?O), or an —S(?O)2 group, a polar group (ii) containing a —CN or an alkyl group having 1 to 6 carbon atoms, in which a part of hydrogen atoms is substituted with a fluorine atom, or a 4- to 7-membered ring polar group (iii) containing a —C(?O)—O— or a —C(?O)—N— group, where when X is a 4- to 7-membered ring polar group (iii) containing —C(?O)—N—, at least one of R10 and R20 is lithium.Type: GrantFiled: May 19, 2015Date of Patent: October 9, 2018Assignee: UBE INDUSTRIES, LTD.Inventors: Yuichi Kotou, Tatsuo Fujino, Kei Shimamoto, Shuichi Koso, Shoji Shikita, Yosuke Sato, Junichi Chika
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Publication number: 20180277900Abstract: The present invention provides a non-aqueous electrolytic solution for a lithium secondary battery or a lithium ion capacitor, wherein the non-aqueous electrolytic solution includes a lithium salt as dissolved in a non-aqueous solvent in a concentration of 0.8 to 1.5 M (mol/L), the non-aqueous solvent includes, in relation to the whole of the non-aqueous solvent, 5 to 25% by volume of ethylene carbonate, 5 to 25% by volume of propylene carbonate, 20 to 30% by volume of dimethyl carbonate, 20 to 40% by volume of methyl ethyl carbonate, and 10 to 20% by volume of a fluorinated chain ester; the total content of ethylene carbonate and propylene carbonate in the non-aqueous solvent is 20 to 30% by volume, the total content of dimethyl carbonate and the fluorinated chain ester in the non-aqueous solvent is 30 to 40% by volume; and the flash point of the non-aqueous electrolytic solution is 20° C. or higher, and the present invention also provides an energy storage device.Type: ApplicationFiled: September 29, 2016Publication date: September 27, 2018Applicant: UBE INDUSTRIES, LTD.Inventors: Koji ABE, Makoto BABAZONO, Masahide KONDO, Hiroshi YANAGI, Kei SHIMAMOTO
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Publication number: 20180205071Abstract: The present teaching provides a non-aqueous electrolyte secondary battery provided with a non-aqueous electrolyte solution having a composition able to achieve high battery performance even in an extremely low temperature region (for example, ?30° C. or lower). The non-aqueous electrolyte solution disclosed herein contains, as non-aqueous solvents, ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC) and ethyl propionate (EP), and when the total volume of the non-aqueous solvents is 100 vol. %, the content of EC is 20 to 30 vol. %, the content of PC is 5 to 10 vol. %, the content of EP is 5 to 10 vol. %, and the content of DMC+EMC is 50 to 70 vol. %.Type: ApplicationFiled: January 12, 2018Publication date: July 19, 2018Inventors: Kenta Ishii, Ryosuke Ohsawa, Koji Abe, Kei Shimamoto, Makoto Babazono
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NONAQUEOUS ELECTROLYTE, CAPACITOR DEVICE USING SAME, AND CARBOXYLIC ACID ESTER COMPOUND USED IN SAME
Publication number: 20180166746Abstract: The present invention provides a nonaqueous electrolytic solution capable of improving electrochemical characteristics in the case of using an energy storage device at a high temperature and at a high voltage and further capable of inhibiting the gas generation while maintaining a capacity retention rate after storage at a high temperature and at a high voltage and also provides an energy storage device using the same. Disclosed is a nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, the nonaqueous electrolytic solution containing a carboxylic acid ester compound represented by the following general formula (I). In the formula, each of R1 and R2 independently represents a hydrogen atom, a —C(?O)—OR4 group, or the like, and R1 and R2 may be bonded to each other to form a ring structure. R3 represents a hydrogen atom or the like, and n represents an integer of 1 to 3.Type: ApplicationFiled: December 17, 2014Publication date: June 14, 2018Applicant: UBE INDUSTRIES, LTD.Inventors: Kei SHIMAMOTO, Koji ABE, Shoji SHIKITA, Kazuhiro MIYOSHI -
Publication number: 20180114651Abstract: Provided are (1) a nonaqueous electrolytic solution having lithium hexafluorophosphate dissolved in a nonaqueous solvent containing a cyclic carbonate and a linear carbonate, the nonaqueous electrolytic solution including, as a dissolution aid of lithium difluorophosphate, a linear ether compound containing a methoxy group and having a carbon number of 2 or more, a ratio (% by volume/% by mass) of a proportion (% by volume) of the dissolution aid to the total volume of the nonaqueous solvent to an amount (% by mass) of lithium difluorophosphate in the nonaqueous electrolytic solution being 0.1 or more and 5 or less, and lithium difluorophosphate being dissolved in an amount of 1.2% by mass or more at 25° C.; and (2) a lithium secondary battery and a lithium ion capacitor each using the nonaqueous electrolytic solution. The nonaqueous electrolytic solution is excellent in output characteristics and high temperature cyclic property and is capable of suppressing a metal elution amount.Type: ApplicationFiled: November 16, 2015Publication date: April 26, 2018Applicant: UBE INDUSTRIES, LTD.Inventors: Kei SHIMAMOTO, Yousuke KISHIDA
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Patent number: 9934911Abstract: The present invention provides a nonaqueous electrolytic solution capable of improving electrochemical characteristics in a broad temperature range and an energy storage device using the same. [1] A nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, the nonaqueous electrolytic solution containing, as an additive, an SO4 group-containing compound having a specified structure and [2] an energy storage device including a positive electrode, a negative electrode, and a nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, wherein the nonaqueous electrolytic solution contains, as an additive, 0.001% by mass or more and less than 5% by mass of an SO4 group-containing compound having a specified structure in the nonaqueous electrolytic solution, are disclosed.Type: GrantFiled: March 31, 2014Date of Patent: April 3, 2018Assignee: UBE INDUSTRIES, LTD.Inventors: Kei Shimamoto, Koji Abe, Yuichi Kotou, Shoji Shikita
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Publication number: 20170275311Abstract: The present invention is concerned with a nonaqueous electrolytic solution having an electrolyte salt dissolved in a nonaqueous solvent, the nonaqueous electrolytic solution containing a compound represented by the following general formula (X), in which a polar group (X) is bound to a phosphorus atom (P), and capable of improving electrochemical characteristics in a broad temperature range; an energy storage device using the same; and a novel compound.Type: ApplicationFiled: May 19, 2015Publication date: September 28, 2017Applicant: Ube Industries, Ltd.Inventors: Yuichi KOTOU, Tatsuo FUJINO, Kei SHIMAMOTO, Shuichi KOSO, Shoji SHIKITA, Yosuke SATO, Junichi CHIKA