Patents by Inventor Shingo Ohta
Shingo Ohta 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: 10720636Abstract: A sintered electrode having a large cathode capacity is obtained. A method for producing a sintered electrode which uses a lithium containing composite oxide as a cathode active material, and lithium lanthanum zirconate as an oxide solid electrolyte comprises: mixing at least the lithium containing composite oxide and a hydroxide, to obtain a cathode mixture; mixing at least the lithium lanthanum zirconate and a lithium salt that has a melting point lower than the lithium lanthanum zirconate, to obtain a solid electrolyte mixture; laminating the cathode mixture and the solid electrolyte mixture, to obtain a laminate; and heating the laminate, to sinter at least the solid electrolyte mixture.Type: GrantFiled: February 12, 2018Date of Patent: July 21, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masatsugu Kawakami, Shingo Ohta
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Publication number: 20200152977Abstract: A composite structure is adapted to a separator of a secondary battery, and includes a compact layer containing a solid electrolyte and a porous layer which contains a solid electrolyte and is integrally formed with the compact layer without having a bonding interface.Type: ApplicationFiled: November 7, 2019Publication date: May 14, 2020Applicant: Toyota Jidosha Kabushiki KaishaInventors: Shingo Ohta, Masaki Watanabe, Yasutoshi Hojo
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Patent number: 10530015Abstract: An all-solid-state lithium secondary battery includes a positive electrode; a negative electrode; and a solid electrolyte arranged between the positive and negative electrodes, to conduct lithium ions. In the all-solid-state lithium secondary battery, a mixed layer is in close contact with a surface of the solid electrolyte adjacent to the positive electrode, the mixed layer containing the positive-electrode active material and (Lix(1??), Mx?/?)?+(B1?y, Ay)z+O2?? (wherein in the formula, M and A each represent at least one or more elements selected from C, Al, Si, Ga, Ge, In, and Sn, ? satisfies 0??<1, ? represents the valence of M, ? represents the average valence of (Li+x(1??), M?), y satisfies 0?y<1, z represents the average valence of (B1?y, Ay) and x, ?, ?, ?, z, and ? satisfy the relational expression (x(1??)+x?/?)?+z=2?) serving as a matrix.Type: GrantFiled: June 20, 2012Date of Patent: January 7, 2020Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Shingo Ohta, Mitsuru Asai, Takahiko Asaoka
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Patent number: 10476077Abstract: An oxide electrolyte sintered body with high lithium ion conductivity and a method for producing the same, which can obtain the oxide electrolyte sintered body with high lithium ion conductivity by sintering at lower temperature than ever before. The method for producing an oxide electrolyte sintered body may comprise the steps of: preparing crystal particles of a garnet-type ion-conducting oxide which comprises Li, H, at least one kind of element L selected from the group consisting of an alkaline-earth metal and a lanthanoid element, and at least one kind of element M selected from the group consisting of a transition element that can be 6-coordinated with oxygen and typical elements belonging to the Groups 12 to 15, and which is represented by a general formula (Lix?3y?z,Ey,Hz)L?M?O? (where E is at least one kind of element selected from the group consisting of Al, Ga, Fe and Si, 3?x?3y?z?7, 0?y<0.22, 0<z?2.8, 2.5???3.5, 1.5???2.Type: GrantFiled: May 25, 2017Date of Patent: November 12, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Chihiro Yada, Shingo Ohta
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Patent number: 10461337Abstract: An oxide all-solid-state battery excellent in lithium ion conductivity and joint strength between an anode active material layer and solid electrolyte layer thereof. In the oxide all-solid-state battery, the solid electrolyte layer is a layer mainly containing a garnet-type oxide solid electrolyte sintered body represented by the following formula (1): (Lix-3y-z, Ey, Hz)L?M?O?; a solid electrolyte interface layer is disposed between the anode active material layer and the solid electrolyte layer; the solid electrolyte interface layer contains at least a Si element and an O element; and a laminate containing at least the anode active material layer, the solid electrolyte interface layer and the solid electrolyte layer has peaks at positions where 2?=32.3°±0.5°, 37.6°±0.5°, 43.8°±0.5°, and 57.7°±0.5° in a XRD spectrum obtained by XRD measurement using CuK? irradiation.Type: GrantFiled: February 23, 2018Date of Patent: October 29, 2019Assignees: JAPAN ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tatsuya Shimoda, Takashi Masuda, Toshiya Saito, Shingo Ohta
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Publication number: 20190207250Abstract: Provided are a battery separator with less voids, a lithium battery comprising the battery separator, and methods for producing them. A battery separator comprising an oxide electrolyte sintered body and a resin, wherein the oxide electrolyte sintered body has grain boundaries between crystal particles of a garnet-type ion-conducting oxide; wherein a number average particle diameter of the crystal particles is 3 ?m or less; and wherein the oxide electrolyte sintered body satisfies the following formula 1: Rgb/(Rb+Rgb)?0.6??Formula 1 where Rb is an intragranular resistance value that is an ion conductivity resistance inside the crystal particles, and Rgb is a grain boundary resistance value that is an ion conductivity resistance of the grain boundaries between the crystal particles.Type: ApplicationFiled: December 26, 2018Publication date: July 4, 2019Applicant: Toyota Jidosha Kabushiki KaishaInventors: Shinji Nakanishi, Shingo Ohta
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Publication number: 20190207249Abstract: A battery with excellent output characteristics and stability. The battery comprising a cathode, an anode and a separator disposed between the cathode and the anode, wherein the cathode comprises an aqueous electrolyte and a cathode active material; wherein the anode comprises an anode active material; wherein the separator comprises a first oxide electrolyte sintered body and a resin; wherein the first oxide electrolyte sintered body has grain boundaries between crystal particles of a garnet-type ion-conducting oxide represented by a general formula (A); wherein a number average particle diameter of the crystal particles is 3 ?m or less; and wherein the first oxide electrolyte sintered body satisfies the following formula 1: Rgb/(Rb+Rgb)?0.6 where Rb is an intragranular resistance value that is an ion conductivity resistance inside the crystal particles, and Rgb is a grain boundary resistance value that is an ion conductivity resistance of the grain boundaries between the crystal particles.Type: ApplicationFiled: December 26, 2018Publication date: July 4, 2019Applicant: Toyota Jidosha Kabushiki KaishaInventors: Shinji Nakanishi, Hiroshi Suyama, Shingo Ohta
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Publication number: 20190207248Abstract: A method for producing an electrode comprising a porous garnet-type ion-conducting oxide sintered body with high ion conductivity, the electrode, and an electrode-electrolyte layer assembly comprising the electrode and an electrolyte layer comprising a dense garnet-type ion-conducting oxide sintered body with high ion conductivity. Disclosed is a method for producing an electrode, the method comprising: preparing crystal particles of a garnet-type ion-conducting oxide; preparing a lithium-containing flux; preparing the electrode active material; preparing an electrolyte material by mixing the crystal particles of the garnet-type ion-conducting oxide and the flux; and sintering the electrolyte material and the electrode active material by heating at a temperature of 650° C. or less, wherein a number average particle diameter of the flux is larger than a number average particle diameter of the crystal particles of the garnet-type ion-conducting oxide.Type: ApplicationFiled: December 26, 2018Publication date: July 4, 2019Applicant: Toyota Jidosha Kabushiki KaishaInventor: Shingo Ohta
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Publication number: 20190103603Abstract: Disclosed is a cathode active material that can lower sintering temperature, the cathode active mated al including a particle of a lithium containing composite oxide having a layered rock-salt crystalline phase, wherein the layered rock-salt crystalline phase is partially deficient in lithium, a percentage of deficient lithium in the layered rock-salt crystalline phase in a surface portion of the particle is higher than that in the layered rock-salt crystalline phase inside the particle, and the particle includes two phases that are different in lattice constant as the layered rock-salt crystalline phase.Type: ApplicationFiled: September 11, 2018Publication date: April 4, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masatsugu KAWAKAMI, Shingo OHTA
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Publication number: 20190088993Abstract: A garnet-type ion-conducting oxide configured to inhibit lithium carbonate formation on the surface of crystal particles thereof, and a method for producing an oxide electrolyte sintered body using the garnet-type ion-conducting oxide. The garnet-type ion-conducting oxide represented by a general formula (Lix-3y-z, Ey, Hz)L?M62 O?(where E is at least one kind of element selected from the group consisting of Al, Ga, Fe and Si; L is at least one kind of element selected from an alkaline-earth metal and a lanthanoid element: M is at least one kind of element selected from a transition element which be six-coordinated with oxygen and typical elements in groups 12 to 15 of the periodic table; 3?x?3y?z?; 0?y?0.22; C?z?2.8; 2.5???3.5; 1.5???2.5; and 11???13), wherein a half-width of a diffraction peak which has a highest intensity and which is observed at a diffraction angle (2?) in a range of from 29° to 32° as a result of X-ray diffraction measurement using CuK? radiation, is 0.164° or less.Type: ApplicationFiled: September 10, 2018Publication date: March 21, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Shingo OHTA
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Publication number: 20190074543Abstract: Provided are a slurry for a solid electrolyte, which can reduce the usage of a polymer binder, a method for producing a solid electrolyte layer, and a method for producing an all-solid-state battery. Disclosed is a slurry for a solid electrolyte, the slurry comprising a solvent, a lithium compound, and crystal particles of a garnet-type ion-conducting oxide represented by a general formula (Lix?3y?z,Ey,Hz)L?M?O? (where E is at least one kind of element selected from the group consisting of Al, Ga, Fe and Si; L is at least one kind of element selected from an alkaline-earth metal and a lanthanoid element; M is at least one kind of element selected from a transition element that can be six-coordinated with oxygen and typical elements in groups 12 to 15 of the periodic table; 3?x?3y?z?7; 0?y?0.25; 0<z?2.8; 2.5???3.5; 1.5???2.5; and 11???13).Type: ApplicationFiled: September 4, 2018Publication date: March 7, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasutoshi HOUJYOU, Shingo OHTA
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Publication number: 20180277827Abstract: A sintered electrode having a large cathode capacity is obtained. A method for producing a sintered electrode which uses a lithium containing composite oxide as a cathode active material, and lithium lanthanum zirconate as an oxide solid electrolyte comprises: mixing at least the lithium containing composite oxide and a hydroxide, to obtain a cathode mixture; mixing at least the lithium lanthanum zirconate and a lithium salt that has a melting point lower than the lithium lanthanum zirconate, to obtain a solid electrolyte mixture; laminating the cathode mixture and the solid electrolyte mixture, to obtain a laminate; and heating the laminate, to sinter at least the solid electrolyte mixture.Type: ApplicationFiled: February 12, 2018Publication date: September 27, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masatsugu KAWAKAMI, Shingo OHTA
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Publication number: 20180248201Abstract: An oxide all-solid-state battery excellent in lithium ion conductivity and joint strength between an anode active material layer and solid electrolyte layer thereof. In the oxide all-solid-state battery, the solid electrolyte layer is a layer mainly containing a garnet-type oxide solid electrolyte sintered body represented by the following formula (1): (Lix-3y-z, Ey, Hz)L?M?O?; a solid electrolyte interface layer is disposed between the anode active material layer and the solid electrolyte layer; the solid electrolyte interface layer contains at least a Si element and an O element; and a laminate containing at least the anode active material layer, the solid electrolyte interface layer and the solid electrolyte layer has peaks at positions where 2?=32.3°±0.5°, 37.6°±0.5°, 43.8°±0.5°, and 57.7°±0.5° in a XRD spectrum obtained by XRD measurement using CuK? irradiation.Type: ApplicationFiled: February 23, 2018Publication date: August 30, 2018Applicants: JAPAN ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tatsuya SHIMODA, Takashi MASUDA, Toshiya SAITO, Shingo OHTA
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Publication number: 20180219253Abstract: A method for producing a garnet type oxide solid electrolyte that is inhibited from a reaction of a flux and a crucible in heating and from a contamination with a crucible component produced by the reaction. The method for producing a garnet type oxide solid electrolyte represented by a general formula (Lia1, Aa2)La3-bEbZr2-cMcO12 may comprise the steps of: preparing raw materials for the garnet type oxide solid electrolyte at a stoichiometric ratio of the above general formula; preparing flux raw materials by using NaCl and KCl at a molar ratio of NaCl:KCl=x:(1?x) where x satisfies 0?x?1; mixing the solid electrolyte raw materials prepared in the above step and the flux raw materials prepared in the above step; and heating a mixture of the solid electrolyte raw materials and the flux raw materials at a temperature of less than 1100° C.Type: ApplicationFiled: January 11, 2018Publication date: August 2, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Shingo OHTA
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Publication number: 20180212246Abstract: A method for producing a cathode that can lower a sintering temperature is provided. The method comprises: acid-treating particles of a lithium containing composite oxide that has a layered rock-salt structure; obtaining a mixture by mixing the acid-treated particles with a lithium salt whose melting point is lower than that of the lithium containing composite oxide; and heating and sintering the mixture.Type: ApplicationFiled: December 11, 2017Publication date: July 26, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masatsugu Kawakami, Shingo Ohta
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Publication number: 20170346092Abstract: An oxide electrolyte sintered body with high lithium ion conductivity and a method for producing the same, which can obtain the oxide electrolyte sintered body with high lithium ion conductivity by sintering at lower temperature than ever before. The method for producing an oxide electrolyte sintered body may comprise the steps of: preparing crystal particles of a garnet-type ion-conducting oxide which comprises Li, H, at least one kind of element L selected from the group consisting of an alkaline-earth metal and a lanthanoid element, and at least one kind of element M selected from the group consisting of a transition element that can be 6-coordinated with oxygen and typical elements belonging to the Groups 12 to 15, and which is represented by a general formula (Lix?3y?z,Ey,Hz)L?M?O? (where E is at least one kind of element selected from the group consisting of Al, Ga, Fe and Si, 3?x?3y?z?7, 0?y<0.22, 0<z?2.8, 2.5???3.5, 1.5???2.Type: ApplicationFiled: May 25, 2017Publication date: November 30, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Chihiro YADA, Shingo OHTA
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Publication number: 20170162902Abstract: A composite solid electrolyte with excellent formability and chemical stability and high lithium ion conductivity. The composite solid electrolyte may comprise an oxide-based solid electrolyte and a sulfide-based solid electrolyte, wherein the oxide-based solid electrolyte is (Li7?3Y?Z, AlY)(La3)(Zr2?Z, MZ)O12 (where M is at least one element selected from the group consisting of Nb and Ta; Y is a number in a range of 0?Y<0.22; and Z is a number in a range of 0?Z?2), and wherein the sulfide-based solid electrolyte is VLiX—(1?V)((1?W)Li2S—WP2S5) (where X is a halogen element; V is a number in a range of 0<V<1; and W is a number in a range of 0.125?W?0.30).Type: ApplicationFiled: November 25, 2016Publication date: June 8, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shingo OHTA, Hideyuki YAMAMURA
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Patent number: 9531036Abstract: An all-solid lithium secondary battery 20 includes a solid electrolyte layer 10 composed of a garnet-type oxide, a positive electrode 12 formed on one surface of the solid electrolyte layer 10 and a negative electrode 14 formed on the other surface of the solid electrolyte layer 10. This all-solid lithium secondary battery 20 includes an integrally sintered complex of the solid electrolyte layer 10 and the positive electrode active material layer 12a. This complex is obtained by integrally sintering a stacked structure of an active material layer and a solid electrolyte layer. The solid electrolyte layer includes: abase material mainly including a fundamental composition of Li7+X?Y(La3?x,Ax) (Zr2?Y,TY)O12, wherein A is one or more of Sr and Ca, T is one or more of Nb and Ta, and 0?X?1.0 and 0?Y<0.75 are satisfied, as a main component; and an additive component including lithium borate and aluminum oxide.Type: GrantFiled: August 20, 2014Date of Patent: December 27, 2016Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Shingo Ohta, Yuki Goto, Tooru Saeki, Shogo Komagata, Takahiko Asaoka
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Patent number: 9146527Abstract: An apparatus cooperation system including first and second apparatuses connected via a network to share a function, the first apparatus including a first counting unit counting a number of the output objects output by the first output unit based on a first counting rule, the second apparatus including a second counting unit counting a number of the output objects output by the second output unit based on a second counting rule. Further, when an output condition to output the image data by the first apparatus and the second apparatus is accepted, the first counting unit counts a total number of the output objects output by the first output unit and the second output unit based on the first counting rule.Type: GrantFiled: September 6, 2012Date of Patent: September 29, 2015Assignee: RICOH COMPANY, LTD.Inventor: Shingo Ohta
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Patent number: 9081615Abstract: In a device cooperation system, devices connected via a network take partial charge of providing a function. A first device acquires image data to be output; receives a condition used when the first device and a second device output the image data; stores a possible output amount that can be output by the first device; determines whether a total page number, which is obtained from the condition and a number of pages of the acquired image data, is less than or equal to the possible output amount; determines first and second output numbers to be respectively allocated to the first and second devices; sends the image data and the second output number to the second device; and updates the possible output amount according to a number output by the first and second devices.Type: GrantFiled: August 22, 2012Date of Patent: July 14, 2015Assignee: RICOH COMPANY, LTD.Inventor: Shingo Ohta