Patents by Inventor Kuniaki Okamoto
Kuniaki Okamoto 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: 20220069354Abstract: An object of the present invention is to provide a highly practical electrolyte solution which has high oxidation resistance and enables dissolution-precipitation of magnesium to proceed repeatedly and stably. The present invention relates to an electrolyte solution for a magnesium battery comprising a mixture of a compound represented by the general formula [1], a Lewis acid or a compound represented by the general formula [4], and a solvent; an electrochemical device containing the electrolyte solution; and a compound represented by the general formula [1].Type: ApplicationFiled: December 26, 2019Publication date: March 3, 2022Inventors: Goro MORI, Kazuhiko SATO, Satoru INOMATA, Hironori MIZUTA, Kuniaki OKAMOTO
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Patent number: 11258066Abstract: An object of the present invention is to provide an excellent binder agent composition solving problems such as the decrease in a charge/discharge capacity that occurs in a case where a silicon-containing active material is used, a slurry composition and an electrode in which the binder agent composition is used, and a method for preparing the electrode.Type: GrantFiled: February 2, 2018Date of Patent: February 22, 2022Assignee: FUJIFILM Wako Pure Chemical CorporationInventors: Hironori Mizuta, Kazuki Takimoto, Hiromi Watahiki, Kaho Sugimoto, Takatoshi Matsuura, Kuniaki Okamoto, Nobutaka Shimamura
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Publication number: 20210280870Abstract: The present invention has an object to provide a positive electrode active material for a magnesium battery; and a magnesium battery which has a high operating voltage with respect to magnesium and can be repeatedly charged and discharged at a high capacity retention rate, using the positive electrode active material. The present invention relates to a positive electrode active material for a magnesium battery, containing a compound represented by the general formula (1), a positive electrode material composition for a magnesium battery, a positive electrode for a magnesium battery, and a magnesium battery: AgpSO4??(1) [in the formula (1), p satisfies 0<p?2].Type: ApplicationFiled: July 30, 2019Publication date: September 9, 2021Inventors: Kazuhiko SATO, Hironori MIZUTA, Kuniaki OKAMOTO
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Patent number: 10862169Abstract: The present invention relates to an electrolytic solution for a magnesium battery, formed by mixing a compound represented by the following general formula (I), a Lewis acid or a compound represented by the following general formula (A), and a solvent; and the like. {In the formula, m represents 0 or 2, n represents 2 in a case of m=0 and represents 0 or 1 in a case of m=2, X1 represents a chlorine atom or a bromine atom, and two R1's each independently represent a magnesium chloride oxy group; a magnesium bromide oxy group; an alkyl group which may have a halogeno group or the like as a substituent; an alkoxy group; an aryl group which may have an alkoxy group or the like as a substituent; an aryloxy group which may have an alkoxy group or the like as a substituent; or a group represented by the following general formula (1), and two R1's may also form the following general formula (2).Type: GrantFiled: May 26, 2017Date of Patent: December 8, 2020Assignee: FUJIFILM WAKO PURE CHEMICAL CORPORATIONInventors: Kazuhiko Sato, Goro Mori, Hiromi Watahiki, Kuniaki Okamoto, Nobutaka Shimamura
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Patent number: 10862127Abstract: It is an object of the present invention to provide an electrode capable of maintaining superior capacity retention without destruction of an electrode structure, even in the case of using an active material including silicon.Type: GrantFiled: November 21, 2017Date of Patent: December 8, 2020Assignees: TOKYO UNIVERSITY OF SCIENCE FOUNDATION, FUJIFILM WAKO PURE CHEMICAL CORPORATIONInventors: Shinichi Komaba, Naoaki Yabuuchi, Zhen-ji Han, Takeo Sasaki, Shota Hashimoto, Kuniaki Okamoto, Tsuneaki Maesawa
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Patent number: 10854881Abstract: It is an object of the present invention to provide an electrode having superior charge-discharge capacity, even in the case of using an active material containing silicon.Type: GrantFiled: April 21, 2015Date of Patent: December 1, 2020Assignees: TOKYO UNIVERSITY OF SCIENCE FOUNDATION, FUJIFILM WAKO PURE CHEMICAL CORPORATIONInventors: Shinichi Komaba, Kiyofumi Yamagiwa, Shoko Aoki, Kuniaki Okamoto, Takahiro Kiyosu, Yasuyoshi Mori, Takatoshi Matsuura, Michihiko Sato
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Patent number: 10727534Abstract: An object of the present invention is to provide a highly practical electrolytic solution which has a high oxidative decomposition potential, enables the dissolution and precipitation of magnesium to stably repeatedly proceed, and is easy to prepare. The present invention relates to an electrolytic solution for a magnesium battery comprising: a compound represented by the general formula (I), a Lewis acid or a compound represented by the general formula (A), and a solvent; and to the compound represented by the general formula (I).Type: GrantFiled: March 31, 2017Date of Patent: July 28, 2020Assignee: FUJIFILM Wako Pure Chemical CorporationInventors: Kazuhiko Sato, Goro Mori, Hiromi Watahiki, Takahiro Kiyosu, Kuniaki Okamoto
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Publication number: 20200235396Abstract: An object of the present invention is to provide an excellent binder agent composition solving problems such as the decrease in a charge/discharge capacity that occurs in a case where a silicon-containing active material is used, a slurry composition and an electrode in which the binder agent composition is used, and a method for preparing the electrode.Type: ApplicationFiled: February 2, 2018Publication date: July 23, 2020Inventors: Hironori MIZUTA, Kazuki TAKIMOTO, Hiromi WATAHIKI, Kaho SUGIMOTO, Takatoshi MATSUURA, Kuniaki OKAMOTO, Nobutaka SHIMAMURA
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Publication number: 20190367657Abstract: An object of the present invention is to provide an excellent binder agent composition solving problems such as the decrease in a charge/discharge capacity, a slurry composition and an electrode in which the binder agent composition is used, and a method for preparing the electrode. The present invention relates to “a binder agent composition containing a copolymer containing a monomer unit derived from acrylic acid and one or two kinds of monomer units derived from a compound represented by the following general formula (I) or the like as constituent components, a bivalent to decavalent alcohol, and water; [in the formula, R1 represents a hydrogen atom or a methyl group, in a case where R2 is a hydrogen atom, R1 represents a methyl group, and R2 represents a hydrogen atom; an alkyl group; an alkyl group substituted with a fluorine atom or a hydroxy group, or the like.Type: ApplicationFiled: February 2, 2018Publication date: December 5, 2019Inventors: Hironori MIZUTA, Kazuki TAKIMOTO, Hiromi WATAHIKI, Kaho SUGIMOTO, Takatoshi MATSUURA, Kuniaki OKAMOTO, Nobutaka SHIMAMURA
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Patent number: 10439252Abstract: It is an object of the present invention to provide an electrochemical device having an electrolytic solution having high current density, as well as high safety, where dissolution and deposition of magnesium progress repeatedly and stably. Furthermore, the present invention relates to an electrolytic solution for an electrochemical device, comprising (1) a supporting electrolyte comprising a magnesium salt, and (2) at least one or more kinds of the compound represented by following general formula (I) (wherein n represents an integer of 0 to 6, and n pieces of R1 and n pieces of R2 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a halogenoalkyl group having 1 to 6 carbon atoms.Type: GrantFiled: January 22, 2014Date of Patent: October 8, 2019Assignee: FUJIFILM Wako Pure Chemical CorporationInventors: Tsutomu Watahiki, Takahiro Kiyosu, Kazuhiko Sato, Goro Mori, Kuniaki Okamoto
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Publication number: 20190296396Abstract: The present invention relates to an electrolytic solution for a magnesium battery, formed by mixing a compound represented by the following general formula (I), a Lewis acid or a compound represented by the following general formula (A), and a solvent; and the like. {In the formula, m represents 0 or 2, n represents 2 in a case of m=0 and represents 0 or 1 in a case of m=2, X1 represents a chlorine atom or a bromine atom, and two R1's each independently represent a magnesium chloride oxy group; a magnesium bromide oxy group; an alkyl group which may have a halogeno group or the like as a substituent; an alkoxy group; an aryl group which may have an alkoxy group or the like as a substituent; an aryloxy group which may have an alkoxy group or the like as a substituent; or a group represented by the following general formula (1), and two R1's may also form the following general formula (2).Type: ApplicationFiled: May 26, 2017Publication date: September 26, 2019Inventors: Kazuhiko SATO, Goro MORI, Hiromi WATAHIKI, Kuniaki OKAMOTO, Nobutaka SHIMAMURA
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Patent number: 10367231Abstract: It is an object of the present invention to provide an electrolytic solution having high oxidation decomposition potential, where dissolution and deposition of magnesium proceed repeatedly and stably, using a non-nucleophilic alkoxide-type magnesium salt.Type: GrantFiled: November 27, 2015Date of Patent: July 30, 2019Assignee: FUJIFILM Wako Pure Chemical CorporationInventors: Kazuhiko Sato, Takahiro Kiyosu, Hironori Mizuta, Goro Mori, Kuniaki Okamoto
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Publication number: 20190131657Abstract: An object of the present invention is to provide a highly practical electrolytic solution which has a high oxidative decomposition potential, enables the dissolution and precipitation of magnesium to stably repeatedly proceed, and is easy to prepare. The present invention relates to an electrolytic solution for a magnesium battery comprising: a compound represented by the general formula (I), a Lewis acid or a compound represented by the general formula (A), and a solvent; and to the compound represented by the general formula (I).Type: ApplicationFiled: March 31, 2017Publication date: May 2, 2019Inventors: Kazuhiko SATO, Goro MORI, Hiromi WATAHIKI, Takahiro KIYOSU, Kuniaki OKAMOTO
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Patent number: 10044040Abstract: It is an object of the present invention to provide an electrode capable of maintaining superior capacity retention without destruction of an electrode structure, even in the case of using an active material including silicon.Type: GrantFiled: October 25, 2013Date of Patent: August 7, 2018Assignees: TOKYO UNIVERSITY OF SCIENCE FOUNDATION, WAKO PURE CHEMICAL INDUSTRIES, LTD.Inventors: Shinichi Komaba, Naoaki Yabuuchi, Zhen-Ji Han, Takeo Sasaki, Shota Hashimoto, Kuniaki Okamoto, Tsuneaki Maesawa
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Publication number: 20180138508Abstract: It is an object of the present invention to provide an electrode capable of maintaining superior capacity retention without destruction of an electrode structure, even in the case of using an active material including silicon.Type: ApplicationFiled: November 21, 2017Publication date: May 17, 2018Applicants: WAKO PURE CHEMICAL INDUSTRIES,LTD., TOKYO UNIVERSITY OF SCIENCE FOUNDATIONInventors: Shinichi Komaba, Naoaki Yabuuchi, Zhen-ji Han, Takeo Sasaki, Shota Hashimoto, Kuniaki Okamoto, Tsuneaki Maesawa
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Publication number: 20170331154Abstract: It is an object of the present invention to provide an electrolytic solution having high oxidation decomposition potential, where dissolution and deposition of magnesium proceed repeatedly and stably, using a non-nucleophilic alkoxide-type magnesium salt.Type: ApplicationFiled: November 27, 2015Publication date: November 16, 2017Applicant: Wako Pure Chemical Industries, Ltd.Inventors: Kazuhiko SATO, Takahiro KIYOSU, Hironori MIZUTA, Goro MORI, Kuniaki OKAMOTO
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Publication number: 20170040612Abstract: It is an object of the present invention to provide an electrode having superior charge-discharge capacity, even in the case of using an active material containing silicon.Type: ApplicationFiled: April 21, 2015Publication date: February 9, 2017Applicants: WAKO PURE CHEMICAL INDUSTRIES, LTD., TOKYO UNIVERSITY OF SCIENCE FOUNDATIONInventors: Shinichi Komaba, Kiyofumi Yamagiwa, Shoko Aoki, Kuniaki Okamoto, Takahiro Kiyosu, Yasuyoshi Mori, Takatoshi Matsuura, Michihiko Sato
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Patent number: 9263767Abstract: It is an object of the present invention to provide an electrochemical device having an electrolytic solution having high current density and high oxidation resistance, as well as high safety, where dissolution and deposition of magnesium progress repeatedly and stably. The present invention relates to the electrolytic solution for an electrochemical device comprising (1) the supporting electrolyte composed of a magnesium salt and (2) at least one or more kinds of the compound represented by the following general formula [2], as well as the electrochemical device comprising said electrolytic solution, a positive electrode, a negative electrode and a separator.Type: GrantFiled: July 26, 2012Date of Patent: February 16, 2016Assignee: Wako Pure Chemical Industries, Ltd.Inventors: Tsutomu Watahiki, Takahiro Kiyosu, Kuniaki Okamoto
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Patent number: 9257720Abstract: The present invention provides a non-aqueous electrolytic solution including a methylenebissulfonate derivative and improving initial irreversible capacity and other characteristics of a battery such as a cycle characteristics, electric capacity, and storage characteristics; a method for producing thereof; and a battery using the electrolytic solution. The non-aqueous electrolytic solution includes: (1) a non-aqueous solvent comprising at least one selected from a cyclic carbonate ester, a straight chained carbonate ester and/or a cyclic carboxylic acid ester, (2) a lithium salt which may be dissolved in the non-aqueous solvent, as an electrolyte salt, and (3) a methylenebissulfonate derivative of formula [1]: The method includes steps of dissolving a lithium salt in a non-aqueous solvent, and then dissolving the methylenebissulfonate derivative.Type: GrantFiled: August 2, 2011Date of Patent: February 9, 2016Assignee: WAKO PURE CHEMICAL INDUSTRIES, LTD.Inventors: Kuniaki Okamoto, Motoshige Sumino, Tsutomu Watahiki, Kouki Ohkubo, Tatsuko Ikeda
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Publication number: 20150364792Abstract: It is an object of the present invention to provide an electrochemical device having an electrolytic solution having high current density, as well as high safety, where dissolution and deposition of magnesium progress repeatedly and stably. Furthermore, the present invention relates to an electrolytic solution for an electrochemical device, comprising (1) a supporting electrolyte comprising a magnesium salt, and (2) at least one or more kinds of the compound represented by following general formula (I) (wherein n represents an integer of 0 to 6, and n pieces of R1 and n pieces of R2 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a halogenoalkyl group having 1 to 6 carbon atoms.Type: ApplicationFiled: January 22, 2014Publication date: December 17, 2015Applicant: WAKO PURE CHEMICAL INDUSTRIES, LTD.Inventors: Tsutomu Watahiki, Takahiro Kiyosu, Kazuhiko Sato, Goro Mori, Kuniaki Okamoto