Patents by Inventor Atsushi WATARAI
Atsushi WATARAI 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: 11961996Abstract: Provided are: a negative electrode material for nonaqueous secondary batteries, which can yield a high-capacity nonaqueous secondary battery having excellent discharge rate characteristics; and a negative electrode for nonaqueous secondary batteries and a nonaqueous secondary battery. Also provided is a nonaqueous secondary battery having excellent charge-discharge efficiency. The negative electrode material for nonaqueous secondary batteries includes carbonaceous particles (A) and silicon oxide particles (B), and satisfies the followings: a) the average particle size (50% cumulative particle size from the smaller particle side; d50) is 3 ?m to 30 ?m, and the 10% cumulative particle size from the smaller particle side (d10) is 0.1 ?m to 10 ?m; b) the ratio (R1=d90/d10) between the 90% cumulative particle size from the smaller particle side (d90) and the d10 is 3 to 20; and c) the ratio (R2=d50/d10) between the d50 and the d10 is 1.7 to 5.Type: GrantFiled: May 22, 2019Date of Patent: April 16, 2024Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Shunsuke Yamada, Nobuyuki Ishiwatari, Naoto Maru, Atsushi Watarai
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Patent number: 11631895Abstract: The present invention provides an energy device having excellent properties. Also provided is a nonaqueous electrolyte solution containing a compound represented by the following Formula (1), wherein R11, R12 and R13 each independently represent an organic group having 1 to 3 carbon atoms; and R11 and R12, R11 and R13, or R12 and R13 are optionally bound with each other to form a 5-membered ring or a 6-membered ring, with a proviso that a total number of carbon atoms of R11, R12 and R13 is 7 or less.Type: GrantFiled: May 8, 2020Date of Patent: April 18, 2023Assignees: MITSUBISHI CHEMICAL CORPORATION, MU IONIC SOLUTIONS CORPORATIONInventors: Atsushi Watarai, Hiroyuki Tokuda, Akiko Yabe
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Patent number: 11296357Abstract: An object of the present invention 1 is to provide a non-aqueous electrolyte secondary battery having excellent general performance balance between durability performance and properties, such as a capacity, a resistance, and output characteristics.Type: GrantFiled: September 20, 2019Date of Patent: April 5, 2022Assignees: Mitsubishi Chemical Corporation, MU IONIC SOLUTIONS CORPORATIONInventors: Eiji Nakazawa, Youichi Oohashi, Atsushi Watarai
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Patent number: 11024853Abstract: According to the present disclosure, there is provided a technique making it possible to improve suitably the performance of a nonaqueous electrolyte secondary cell in which a SEI film is formed on the surface of a negative electrode active material. The nonaqueous electrolyte secondary cell disclosed herein includes a positive electrode 10, a negative electrode 20, and a nonaqueous electrolytic solution, wherein a negative electrode SEI film 29 including at least a LiBOB skeleton and a fluorosulfonic acid skeleton is formed on the surface of a negative electrode active material 28, and a positive electrode SEI film 19 including at least a phosphoric acid skeleton is formed on the surface of a positive electrode active material 18.Type: GrantFiled: December 10, 2018Date of Patent: June 1, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenta Ishii, Masahiro Morita, Risa Sato, Ryo Hanasaki, Yusuke Onoda, Koji Takahata, Atsushi Watarai
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Publication number: 20200274199Abstract: The present invention provides an energy device having excellent properties. Also provided is a nonaqueous electrolyte solution containing a compound represented by the following Formula (1), wherein R11, R12 and R13 each independently represent an organic group having 1 to 3 carbon atoms; and R11 and R12, R11 and R13, or R12 and R13 are optionally bound with each other to form a 5-membered ring or a 6-membered ring, with a proviso that a total number of carbon atoms of R11, R12 and R13 is 7 or less.Type: ApplicationFiled: May 8, 2020Publication date: August 27, 2020Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Atsushi WATARAI, Hiroyuki TOKUDA, Akiko YABE
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Publication number: 20200220222Abstract: Provided is a nonaqueous electrolyte secondary battery including: a positive electrode; a negative electrode; and a nonaqueous electrolyte solution, wherein the positive electrode includes a metal oxide represented by the following composition formula (14): Lia101Nib101Coc101Md101O2 (14), where a101, b101, c101 and d101 represent numerical values of 0.90?a101?1.10, 0.50?b101?0.98, 0.01?c101<0.50 and 0.01?d101<0.50, satisfying b101+c101+d101=1; and M represents at least one element selected from the group consisting of Mn, Al, Mg, Zr, Fe, Ti, and Er, and the nonaqueous electrolyte solution includes a compound represented by the following Formula (C): where R101 to R103 each independently represent a C1-10 alkyl group optionally having a substituent, or a C6-18 aryl group optionally having a substituent; and X represents hydrogen, a C2-10 alkenyl group, or a C2-10 alkynyl group.Type: ApplicationFiled: March 20, 2020Publication date: July 9, 2020Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Atsushi WATARAI, Eiji NAKAZAWA, Shuhei SAWA
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Patent number: 10615455Abstract: An object of the present invention 1 is to provide a non-aqueous electrolyte secondary battery having excellent general performance balance between durability performance and properties, such as a capacity, a resistance, and output characteristics.Type: GrantFiled: February 21, 2017Date of Patent: April 7, 2020Assignee: Mitsubishi Chemical CorporationInventors: Eiji Nakazawa, Youichi Oohashi, Atsushi Watarai
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Publication number: 20200036041Abstract: An object of the present invention 1 is to provide a non-aqueous electrolyte secondary battery having excellent general performance balance between durability performance and properties, such as a capacity, a resistance, and output characteristics.Type: ApplicationFiled: September 20, 2019Publication date: January 30, 2020Applicant: Mitsubishi Chemical CorporationInventors: Eiji NAKAZAWA, Youichi Oohashi, Atsushi Watarai
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Publication number: 20190273248Abstract: Provided are: a negative electrode material for nonaqueous secondary batteries, which can yield a high-capacity nonaqueous secondary battery having excellent discharge rate characteristics; and a negative electrode for nonaqueous secondary batteries and a nonaqueous secondary battery. Also provided is a nonaqueous secondary battery having excellent charge-discharge efficiency. The negative electrode material for nonaqueous secondary batteries includes carbonaceous particles (A) and silicon oxide particles (B), and satisfies the followings: a) the average particle size (50% cumulative particle size from the smaller particle side; d50) is 3 ?m to 30 ?m, and the 10% cumulative particle size from the smaller particle side (d10) is 0.1 ?m to 10 ?m; b) the ratio (R1=d90/d10) between the 90% cumulative particle size from the smaller particle side (d90) and the d10 is 3 to 20; and c) the ratio (R2=d50/d10) between the d50 and the d10 is 1.7 to 5.Type: ApplicationFiled: May 22, 2019Publication date: September 5, 2019Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Shunsuke YAMADA, Nobuyuki ISHIWATARI, Naoto MARU, Atsushi WATARAI
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Publication number: 20190181455Abstract: According to the present disclosure, there is provided a technique making it possible to improve suitably the performance of a nonaqueous electrolyte secondary cell in which a SEI film is formed on the surface of a negative electrode active material. The nonaqueous electrolyte secondary cell disclosed herein includes a positive electrode 10, a negative electrode 20, and a nonaqueous electrolytic solution, wherein a negative electrode SEI film 29 including at least a LiBOB skeleton and a fluorosulfonic acid skeleton is formed on the surface of a negative electrode active material 28, and a positive electrode SEI film 19 including at least a phosphoric acid skeleton is formed on the surface of a positive electrode active material 18.Type: ApplicationFiled: December 10, 2018Publication date: June 13, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenta ISHII, Masahiro MORITA, Risa SATO, Ryo HANASAKI, Yusuke ONODA, Koji TAKAHATA, Atsushi WATARAI
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Publication number: 20170162906Abstract: An object of the present invention 1 is to provide a non-aqueous electrolyte secondary battery having excellent general performance balance between durability performance and properties, such as a capacity, a resistance, and output characteristics.Type: ApplicationFiled: February 21, 2017Publication date: June 8, 2017Applicant: Mitsubishi Chemical CorporationInventors: Eiji NAKAZAWA, Youichi OOHASHI, Atsushi WATARAI
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Patent number: 9653753Abstract: The demand for improvements in lithium non-aqueous electrolyte secondary batteries has been constantly increasing in recent years, but the durability—most prominently the cycle characteristics—have resided in a trade off relationship with properties such as the capacity, resistance, and output characteristics. A problem has thus been a poor overall property balance. In order to solve this problem, the present invention uses a non-aqueous electrolyte solution including, in addition to an electrolyte and a non-aqueous solvent, (A) at least one compound selected from the group consisting of carbonates having a carbon-carbon unsaturated bond, compounds represented by the following general formula (1), sulfoxides, sulfites, sulfones, sulfonates, sultones, and sulfates; (B) a fluorine atom-containing cyclic carbonate; and (C) a compound that has at least two isocyanate groups in the molecule.Type: GrantFiled: July 31, 2013Date of Patent: May 16, 2017Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Shuhei Sawa, Kunihisa Shima, Yasuyuki Shigematsu, Masamichi Onuki, Atsushi Watarai
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Publication number: 20160359197Abstract: A task of the present invention is to provide a non-aqueous electrolyte secondary battery which exhibits small initial irreversible capacity and high initial efficiency as well as excellent high-temperature cycle characteristics without sacrificing the yield of the battery. The non-aqueous electrolytic solution of the present invention is a non-aqueous electrolytic solution for use in a non-aqueous electrolyte secondary battery which comprises a positive electrode capable of having occluded therein and releasing metal ions, a negative electrode capable of having occluded therein and releasing metal ions, and a non-aqueous electrolytic solution comprising a non-aqueous solvent and an electrolyte dissolved in the non-aqueous solvent, wherein the non-aqueous electrolytic solution contains a compound represented by the general formula (1) in an amount of 0.01 to 4.Type: ApplicationFiled: August 23, 2016Publication date: December 8, 2016Applicant: Mitsubishi Chemical CorporationInventors: Atsushi WATARAI, Masahiro TAKEHARA
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Patent number: 9515348Abstract: An object of the invention is to provide a nonaqueous electrolytic solution which is capable of bringing about a nonaqueous-electrolyte secondary battery improved in initial charge capacity, input/output characteristics, and impedance characteristics. The invention relates to a nonaqueous electrolytic solution which comprises: a nonaqueous solvent; LiPF6; and a specific fluorosulfonic acid salt, and to a nonaqueous-electrolyte secondary battery containing the nonaqueous electrolytic solution.Type: GrantFiled: June 21, 2013Date of Patent: December 6, 2016Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Hiroyuki Tokuda, Hiroaki Yoshida, Atsushi Watarai
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Patent number: 8673489Abstract: An object of the invention is to provide a nonaqueous electrolytic solution which is capable of bringing about a nonaqueous-electrolyte secondary battery improved in initial charge capacity, input/output characteristics, and impedance characteristics. The invention relates to a nonaqueous electrolytic solution which comprises: a nonaqueous solvent; LiPF6; and a specific fluorosulfonic acid salt, and to a nonaqueous-electrolyte secondary battery containing the nonaqueous electrolytic solution.Type: GrantFiled: August 13, 2012Date of Patent: March 18, 2014Assignee: Mitsubishi Chemical CorporationInventors: Hiroyuki Tokuda, Hiroaki Yoshida, Atsushi Watarai
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Publication number: 20130316229Abstract: The demand for improvements in lithium non-aqueous electrolyte secondary batteries has been constantly increasing in recent years, but the durability—most prominently the cycle characteristics—have resided in a trade off relationship with properties such as the capacity, resistance, and output characteristics. A problem has thus been a poor overall property balance. In order to solve this problem, the present invention uses a non-aqueous electrolyte solution including, in addition to an electrolyte and a non-aqueous solvent, (A) at least one compound selected from the group consisting of carbonates having a carbon-carbon unsaturated bond, compounds represented by the following general formula (1), sulfoxides, sulfites, sulfones, sulfonates, sultones, and sulfates; (B) a fluorine atom-containing cyclic carbonate; and (C) a compound that has at least two isocyanate groups in the molecule.Type: ApplicationFiled: July 31, 2013Publication date: November 28, 2013Applicant: Mitsubishi Chemical CorporationInventors: Shuhei SAWA, Kunihisa Shima, Yasuyuki Shigematsu, Masamichi Onuki, Atsushi Watarai
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Publication number: 20120308881Abstract: An object of the invention is to provide a nonaqueous electrolytic solution which is capable of bringing about a nonaqueous-electrolyte secondary battery improved in initial charge capacity, input/output characteristics, and impedance characteristics. The invention relates to a nonaqueous electrolytic solution which comprises: a nonaqueous solvent; LiPF6; and a specific fluorosulfonic acid salt, and to a nonaqueous-electrolyte secondary battery containing the nonaqueous electrolytic solution.Type: ApplicationFiled: August 13, 2012Publication date: December 6, 2012Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Hiroyuki TOKUDA, Hiroaki YOSHIDA, Atsushi WATARAI