Patents by Inventor Daichi Kosaka
Daichi Kosaka 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: 11721805Abstract: Provided is a negative electrode active material that contains silicon clathrate II and that is suitable for a negative electrode of a lithium ion secondary battery. The negative electrode active material includes a silicon material in which silicon clathrate II represented by composition formula NaxSi136 (0?x?10) is contained and a volume of a pore having a diameter of not greater than 100 nm is not less than 0.025 cm3/g.Type: GrantFiled: August 25, 2020Date of Patent: August 8, 2023Assignees: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masanori Harata, Tatsuya Eguchi, Masakazu Murase, Jun Yoshida, Kazuhiro Suzuki, Daichi Kosaka, Shinji Nakanishi
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Patent number: 11600817Abstract: Provided is a novel production method for producing silicon clathrate II. In the production method for producing silicon clathrate II, in a reaction system in which a Na—Si alloy containing Na and Si and an Na getter agent coexist so as not to be in contact with each other, the Na—Si alloy is heated and Na evaporated from the Na—Si alloy is thus caused to react with the Na getter agent to reduce an amount of Na in the Na—Si alloy.Type: GrantFiled: August 25, 2020Date of Patent: March 7, 2023Assignees: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masanori Harata, Jun Yoshida, Kazuhiro Suzuki, Daichi Kosaka, Shinji Nakanishi
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Patent number: 11569502Abstract: When a layered rock-salt type cathode active material and a sulfide solid electrolyte are mixed to be a cathode mixture, and an all solid-state battery is obtained using this mixture, oxygen is released from the cathode active material when the battery is charged, and the sulfide solid electrolyte is oxidized, increasing the battery internal resistance. To increase the concentration of cobalt inside the active material, and at the same time to lower the concentration of cobalt of the surface of the cathode active material, to suppress oxygen release in charging, specifically, a cathode mixture includes: a cathode active material; and a sulfide solid electrolyte, wherein the cathode active material has a layered rock-salt crystal phase, and is made of a composite oxide containing Li, Ni, Co, and Mn, and the concentration of cobalt inside the cathode active material is higher than that of a surface of the cathode active material.Type: GrantFiled: November 19, 2018Date of Patent: January 31, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daichi Kosaka, Jun Yoshida
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Patent number: 11527750Abstract: A main object of the present disclosure is to provide an active material whose volume variation due to charge and discharge is small. The present disclosure achieves the object by providing an active material comprising a primary particle including at least one crystal phase of a Type I silicon clathrate and a Type II silicon clathrate, and the primary particle includes a void inside thereof.Type: GrantFiled: October 30, 2019Date of Patent: December 13, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daichi Kosaka, Jun Yoshida, Tetsuya Waseda, Takamasa Otomo
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Patent number: 11296315Abstract: A main object of the present disclosure is to provide a battery with excellent capacity. The present disclosure achieves the object by providing a battery comprising a cathode layer, an electrolyte layer, and an anode layer, in this order, and the anode layer includes a silicon clathrate compound, as an anode active material, the silicon clathrate compound has a composition represented by MxSi46, wherein M is a metal element, x satisfies 0<x<46, and includes a crystal phase of a Type I silicon clathrate, and an average primary particle size of the silicon clathrate compound is 50 nm or more and 3000 nm or less.Type: GrantFiled: July 8, 2019Date of Patent: April 5, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Jun Yoshida, Daichi Kosaka, Takamasa Otomo, Hideyuki Nakano
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Patent number: 11088367Abstract: A main object of the present disclosure is to provide a novel active material of which volume change due to charge and discharge is small. The present disclosure achieves the object by providing a method for producing an active material having a composition represented by NaxMySi46 (M is a metal element other than Na, x and y satisfy 0<x, 0?y, y?x, and 0<x+y<8), and a silicon clathrate I type crystal phase, the method comprising: a preparing step of preparing a precursor compound having the silicon clathrate I type crystal phase; and a liquid treatment step of bringing the precursor compound into contact with a polar liquid so as to desorb a Na element from the precursor compound and obtain the active material.Type: GrantFiled: October 7, 2019Date of Patent: August 10, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daichi Kosaka, Jun Yoshida, Tetsuya Waseda, Takamasa Otomo
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Patent number: 11075372Abstract: A main object of the present disclosure is to provide a novel active material whose volume variation due to charge/discharge is small. The present disclosure achieves the object by providing an active material having a composition represented by NaxMySi46, wherein M is a metal element other than Na, x and y satisfy 0<x, 0?y, y?x and 0<x+y<8, and comprising a crystal phase of a Type I silicon clathrate.Type: GrantFiled: July 5, 2019Date of Patent: July 27, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Jun Yoshida, Daichi Kosaka, Takamasa Otomo, Tetsuya Waseda, Hideyuki Nakano
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Publication number: 20210066713Abstract: Provided is a negative electrode active material that contains silicon clathrate II and that is suitable for a negative electrode of a lithium ion secondary battery. The negative electrode active material includes a silicon material in which silicon clathrate II represented by composition formula NaxSi136 (0?x?10) is contained and a volume of a pore having a diameter of not greater than 100 nm is not less than 0.025 cm3/g.Type: ApplicationFiled: August 25, 2020Publication date: March 4, 2021Applicants: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masanori HARATA, Tatsuya EGUCHI, Masakazu MURASE, Jun YOSHIDA, Kazuhiro SUZUKI, Daichi KOSAKA, Shinji NAKANISHI
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Publication number: 20210066714Abstract: Provided is a novel production method for producing silicon clathrate II. In the production method for producing silicon clathrate II, in a reaction system in which a Na—Si alloy containing Na and Si and an Na getter agent coexist so as not to be in contact with each other, the Na—Si alloy is heated and Na evaporated from the Na—Si alloy is thus caused to react with the Na getter agent to reduce an amount of Na in the Na—Si alloy.Type: ApplicationFiled: August 25, 2020Publication date: March 4, 2021Applicants: KABUSHIKI KAISHA TOYOTA JIDOSHOKI, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masanori HARATA, Jun YOSHIDA, Kazuhiro SUZUKI, Daichi KOSAKA, Shinji NAKANISHI
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Publication number: 20200176768Abstract: A main object of the present disclosure is to provide an active material whose volume variation due to charge and discharge is small. The present disclosure achieves the object by providing an active material comprising a primary particle including at least one crystal phase of a Type I silicon clathrate and a Type II silicon clathrate, and the primary particle includes a void inside thereof.Type: ApplicationFiled: October 30, 2019Publication date: June 4, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daichi KOSAKA, Jun YOSHIDA, Tetsuya WASEDA, Takamasa OTOMO
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Publication number: 20200119352Abstract: A main object of the present disclosure is to provide a novel active material of which volume change due to charge and discharge is small. The present disclosure achieves the object by providing a method for producing an active material having a composition represented by NaxMySi46 (M is a metal element other than Na, x and y satisfy 0<x, 0?y, y?x, and 0<x+y<8), and a silicon clathrate I type crystal phase, the method comprising: a preparing step of preparing a precursor compound having the silicon clathrate I type crystal phase; and a liquid treatment step of bringing the precursor compound into contact with a polar liquid so as to desorb a Na element from the precursor compound and obtain the active material.Type: ApplicationFiled: October 7, 2019Publication date: April 16, 2020Inventors: Daichi KOSAKA, Jun YOSHIDA, Tetsuya WASEDA, Takamasa OTOMO
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Publication number: 20200020936Abstract: A main object of the present disclosure is to provide a battery with excellent capacity. The present disclosure achieves the object by providing a battery comprising a cathode layer, an electrolyte layer, and an anode layer, in this order, and the anode layer includes a silicon clathrate compound, as an anode active material, the silicon clathrate compound has a composition represented by MxSi46, wherein M is a metal element, x satisfies 0<x<46, and includes a crystal phase of a Type I silicon clathrate, and an average primary particle size of the silicon clathrate compound is 50 nm or more and 3000 nm or less.Type: ApplicationFiled: July 8, 2019Publication date: January 16, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Jun YOSHIDA, Daichi KOSAKA, Takamasa OTOMO, Hideyuki NAKANO
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Publication number: 20200020929Abstract: A main object of the present disclosure is to provide a novel active material whose volume variation due to charge/discharge is small. The present disclosure achieves the object by providing an active material having a composition represented by NaxMySi46, wherein M is a metal element other than Na, x and y satisfy 0<x, 0?y, y?x and 0<x+y<8, and comprising a crystal phase of a Type I silicon clathrate.Type: ApplicationFiled: July 5, 2019Publication date: January 16, 2020Inventors: Jun YOSHIDA, Daichi KOSAKA, Takamasa OTOMO, Tetsuya WASEDA, Hideyuki NAKANO
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Publication number: 20190221843Abstract: When a layered rock-salt type cathode active material and a sulfide solid electrolyte are mixed to be a cathode mixture, and an all solid-state battery is obtained using this mixture, oxygen is released from the cathode active material when the battery is charged, and the sulfide solid electrolyte is oxidized, increasing the battery internal resistance. To increase the concentration of cobalt inside the active material, and at the same time to lower the concentration of cobalt of the surface of the cathode active material, to suppress oxygen release in charging, specifically, a cathode mixture includes: a cathode active material; and a sulfide solid electrolyte, wherein the cathode active material has a layered rock-salt crystal phase, and is made of a composite oxide containing Li, Ni, Co, and Mn, and the concentration of cobalt inside the cathode active material is higher than that of a surface of the cathode active material.Type: ApplicationFiled: November 19, 2018Publication date: July 18, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daichi KOSAKA, Jun YOSHIDA
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Publication number: 20190181432Abstract: An object of the present disclosure is to provide a cathode mixture with high energy density per volume. The present disclosure achieves the object by providing a cathode mixture to be used in an all solid state battery, the cathode mixture comprising: a first cathode active material, a second cathode active material, and a sulfide solid electrolyte; and a ratio of an average particle diameter of the first cathode active material to an average particle diameter of the second cathode active material is 2.0 or more and 4.3 or less.Type: ApplicationFiled: November 30, 2018Publication date: June 13, 2019Inventors: Yuhki YUI, Daichi KOSAKA, Jun YOSHIDA
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Patent number: 10297874Abstract: A method of manufacturing an all-solid-state battery includes a lamination step of laminating a deactivated lithium-containing negative electrode active material layer containing deactivated lithium, a solid electrolyte layer for the all-solid-state battery, and a positive electrode active material layer for the all-solid-state battery such that the solid electrolyte layer for the all-solid-state battery is disposed between the deactivated lithium-containing negative electrode active material layer and the positive electrode active material layer for the all-solid-state battery.Type: GrantFiled: September 14, 2016Date of Patent: May 21, 2019Assignee: Toyota Jidosha Kabushiki KaishaInventors: Keisuke Omori, Hajime Hasegawa, Kengo Haga, Mitsutoshi Otaki, Norihiro Ose, Daichi Kosaka, Masato Hozumi
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Patent number: 9897192Abstract: A lubricating structure for a speed reducer includes: a case; a first reduction gear pair provided inside the case; a second reduction gear pair provided inside the case; a first catch tank arranged inside the case; a second catch tank arranged inside the case; a partition member that includes a partition wall that partitions an inside of the case into a first accommodation space in which the first reduction gear pair is accommodated and a second accommodation space in which the second reduction gear pair is accommodated; a first oil passage communicating with the first accommodation space and configured to guide lubricating oil to the first catch tank; a second oil passage communicating with the second accommodation space and configured to guide lubricating oil to the second catch tank; and a communication port provided in the partition member and communicating the first oil passage with the second oil passage.Type: GrantFiled: October 29, 2015Date of Patent: February 20, 2018Assignees: AISIN SEIKI KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasuaki Tahara, Noriaki Nonaka, Yoshifumi Ashihara, Jun Mikami, Satori Ito, Daichi Kosaka, Yoshihiro Ikushima, Masaya Michishita, Atsushi Kajikawa
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Patent number: 9882234Abstract: An all-solid battery having stacked therein, in order, a positive electrode laminate, an intermediate solid electrolyte layer, and a negative electrode laminate is manufactured by a first pressing step (i) of applying pressure to the positive electrode laminate, a second pressing step (ii) of applying pressure to the negative electrode laminate, and a third pressing step (iii) of applying pressure to the positive electrode laminate, the intermediate solid electrolyte layer, and the negative electrode laminate.Type: GrantFiled: June 9, 2016Date of Patent: January 30, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daichi Kosaka, Norihiro Ose, Kengo Haga, Tomoya Suzuki, Hajime Hasegawa, Keisuke Omori
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Patent number: 9786946Abstract: A solid-state battery comprising a stack including at least one unit cell including a positive electrode layer including a positive electrode active material, a negative electrode layer including a negative electrode active material, and a solid electrolyte layer laminated between the positive and negative electrode layers, and an outer covering accommodating the stack, wherein the solid-state battery further including a pressure receiving member provided on at least a part of a periphery of the outer covering, and wherein the pressure receiving member has a thickness of less than a total thickness of the stack and the outer covering in a stacking direction of the unit cell.Type: GrantFiled: March 18, 2015Date of Patent: October 10, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomoharu Sasaoka, Norihiro Ose, Hajime Hasegawa, Kazuhito Kato, Kengo Haga, Daichi Kosaka
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Publication number: 20170077548Abstract: A method of manufacturing an all-solid-state battery includes a lamination step of laminating a deactivated lithium-containing negative electrode active material layer containing deactivated lithium, a solid electrolyte layer for the all-solid-state battery, and a positive electrode active material layer for the all-solid-state battery such that the solid electrolyte layer for the all-solid-state battery is disposed between the deactivated lithium-containing negative electrode active material layer and the positive electrode active material layer for the all-solid-state battery.Type: ApplicationFiled: September 14, 2016Publication date: March 16, 2017Inventors: Keisuke Omori, Hajime Hasegawa, Kengo Haga, Mitsutoshi Otaki, Norihiro Ose, Daichi Kosaka, Masato Hozumi