Patents by Inventor Nariaki Miki
Nariaki Miki 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: 20250070129Abstract: An anode active material layer for a battery, wherein the anode active material layer includes a carbon-based anode active material and a binder coating the carbon-based anode active material, and the content of the binder is 4.0 to 9.0% by mass, and a coverage of the anode active material by the binder is 8.0 to 25%, an anode active material layer for a battery. A production method of an anode active material layer comprises: blending the carbon-based anode active material, and the 4.0% to 9.0% by mass of the binder with respect to the total amount of the anode active material layer, to prepare an anode composite material; and coating the anode composite material onto a substrate by a dry method to form the anode active material layer.Type: ApplicationFiled: March 15, 2024Publication date: February 27, 2025Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masashi UEDA, Shinji KOJIMA, Tomoko HIGO, Nariaki MIKI
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Publication number: 20250046789Abstract: Provided is a cathode that is configured to decrease battery resistance when it is used in an all-solid-state battery, and a method for producing the cathode. Disclosed is a cathode comprising a cathode layer for all-solid-state batteries, wherein the cathode layer contains cathode active material particles and solid electrolyte particles; wherein at least one of the cathode active material particles and the solid electrolyte particles contain a phosphorus element; and wherein, in a photoelectron spectrum by X-ray photoelectron spectroscopy measurement of the cathode layer, a P peak intensity ratio (A/B), which is derived from the phosphorus element, of a signal intensity A at a binding energy of 131.6 eV to a signal intensity B at a binding energy of 133.1 eV, is larger than 0.58.Type: ApplicationFiled: January 19, 2024Publication date: February 6, 2025Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Nariaki MIKI
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Patent number: 11901558Abstract: A lithium niobate with high lithium ion conductivity. Disclosed is a method for producing a lithium niobate for use in a covering layer covering at least part of a surface of cathode active material particles, the method comprising: preparing a solution containing niobium ions and lithium ions, drying the solution to obtain a lithium niobate precursor, and heating the lithium niobate precursor at a temperature of from 250° C. to 300° C. for a heating time of more than 0 minute and 10 minutes or less.Type: GrantFiled: December 30, 2021Date of Patent: February 13, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Koichi Sugiura, Nariaki Miki, Kazuki Muraishi, Kengo Matsuo
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Publication number: 20220271296Abstract: A composite active material particle that can reduce battery resistance when used in an all-solid-state lithium ion battery is disclosed. The composite active material particle comprises: an active material particle; and a lithium ion conducting oxide with which at least part of a surface of the active material particle is coated, wherein the moisture content in the composite active material particle is no more than 319 ppm.Type: ApplicationFiled: May 6, 2022Publication date: August 25, 2022Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Nariaki MIKI
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Publication number: 20220166002Abstract: Provided is a cathode that is configured to decrease battery resistance when it is used in an all-solid-state battery, and a method for producing the cathode. Disclosed is a cathode comprising a cathode layer for all-solid-state batteries, wherein the cathode layer contains cathode active material particles and solid electrolyte particles; wherein at least one of the cathode active material particles and the solid electrolyte particles contain a phosphorus element; and wherein, in a photoelectron spectrum by X-ray photoelectron spectroscopy measurement of the cathode layer, a P peak intensity ratio (A/B), which is derived from the phosphorus element, of a signal intensity A at a binding energy of 131.6 eV to a signal intensity B at a binding energy of 133.1 eV, is larger than 0.58.Type: ApplicationFiled: February 11, 2022Publication date: May 26, 2022Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Nariaki MIKI
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Publication number: 20220123315Abstract: A lithium niobate with high lithium ion conductivity. Disclosed is a method for producing a lithium niobate for use in a covering layer covering at least part of a surface of cathode active material particles, the method comprising: preparing a solution containing niobium ions and lithium ions, drying the solution to obtain a lithium niobate precursor, and heating the lithium niobate precursor at a temperature of from 250° C. to 300° C. for a heating time of more than 0 minute and 10 minutes or less.Type: ApplicationFiled: December 30, 2021Publication date: April 21, 2022Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Koichi Sugiura, Nariaki Miki, Kazuki Muraishi, Kengo Matsuo
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Publication number: 20210091376Abstract: Provided is a method for producing a cathode that is configured to decrease battery resistance when it is used in an all-solid-state battery. The cathode includes a cathode layer containing composite cathode active material particles and solid electrolyte particles. At least one of the composite cathode active material particles and the solid electrolyte particles contain a sulfur element. In a photoelectron spectrum by X-ray photoelectron spectroscopy measurement of the cathode layer, an S peak intensity ratio (C/D), which is derived from the sulfur element, of a signal intensity C at a binding energy of 161.6 eV to a signal intensity D at a binding energy of 163.1 eV, is larger than 0.78.Type: ApplicationFiled: December 4, 2020Publication date: March 25, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Nariaki MIKI
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Patent number: 10894671Abstract: Provided is a powder conveying system configured to prevent moisture adsorption to powder during powder conveyance. The powder conveying system comprises: a conveying path, a conveying device wherein the conveying device is a part of the conveying path or is connected with the conveying path; a measuring device wherein the measuring device is a part of the conveying path or is connected with the conveying path; a controlling device wherein the controlling device is a part of the conveying path or is connected with the conveying path; and a judging device wherein the judging device is connected with the measuring device and the controlling device.Type: GrantFiled: August 28, 2019Date of Patent: January 19, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Nariaki Miki, Kazuki Muraishi, Sachie Akiba, Kengo Matsuo
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Patent number: 10680245Abstract: Provided is an active material composite powder with which resistance can be reduced, and a method for manufacturing the active material composite powder. The active material composite powder includes an active material and lithium niobate attached onto the surface of the active material, and its BET specific surface area S [m2/g] is 0.93<S<1.44, and the method for manufacturing an active material composite powder includes a spraying and drying step of spraying a solution including lithium and a peroxo complex of niobium onto the active material and at the same time drying the solution, and a heating treatment step of carrying out a heating treatment after the spraying and drying step, wherein the temperature of the heating treatment is higher than 123° C. and lower than 350° C.Type: GrantFiled: July 18, 2014Date of Patent: June 9, 2020Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DOWA HOLDINGS CO., LTD.Inventors: Takayuki Uchiyama, Nariaki Miki, Yoshiaki Aiki, Koji Tanoue
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Patent number: 10629911Abstract: Provided is an active material composite powder with which resistance can be reduced, and a method for manufacturing the active material composite powder. The active material composite powder includes an active material and lithium niobate attached onto the surface of the active material, and its BET specific surface area S [m2/g] is 0.93<S<1.44, and the method for manufacturing an active material composite powder includes a spraying and drying step of spraying a solution including lithium and a peroxo complex of niobium onto the active material and at the same time drying the solution, and a heating treatment step of carrying out a heating treatment after the spraying and drying step, wherein the temperature of the heating treatment is higher than 123° C. and lower than 350° C.Type: GrantFiled: July 18, 2014Date of Patent: April 21, 2020Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DOWA HOLDINGS CO., LTD.Inventors: Takayuki Uchiyama, Nariaki Miki, Yoshiaki Aiki, Koji Tanoue
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Publication number: 20200071087Abstract: Provided is a powder conveying system configured to prevent moisture adsorption to powder during powder conveyance. The powder conveying system comprises: a conveying path, a conveying device wherein the conveying device is a part of the conveying path or is connected with the conveying path; a measuring device wherein the measuring device is a part of the conveying path or is connected with the conveying path; a controlling device wherein the controlling device is a part of the conveying path or is connected with the conveying path; and a judging device wherein the judging device is connected with the measuring device and the controlling device.Type: ApplicationFiled: August 28, 2019Publication date: March 5, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Nariaki Miki, Kazuki Muraishi, Sachie Akiba, Kengo Matsuo
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Publication number: 20200075956Abstract: A lithium niobate with high lithium ion conductivity. Disclosed is a method for producing a lithium niobate for use in a covering layer covering at least part of a surface of cathode active material particles, the method comprising: preparing a solution containing niobium ions and lithium ions, drying the solution to obtain a lithium niobate precursor, and heating the lithium niobate precursor at a temperature of from 250° C. to 300° C. for a heating time of more than 0 minute and 10 minutes or less.Type: ApplicationFiled: August 27, 2019Publication date: March 5, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Koichi SUGIURA, Nariaki MIKI, Kazuki MURAISHI, Kengo MATSUO
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Patent number: 10581078Abstract: Provided is an active material composite powder with which resistance can be reduced, and a method for manufacturing the active material composite powder. The active material composite powder includes an active material and lithium niobate attached onto the surface of the active material, and its BET specific surface area S [m2/g] is 0.93<S<1.44, and the method for manufacturing an active material composite powder includes a spraying and drying step of spraying a solution including lithium and a peroxo complex of niobium onto the active material and at the same time drying the solution, and a heating treatment step of carrying out a heating treatment after the spraying and drying step, wherein the temperature of the heating treatment is higher than 123° C. and lower than 350° C.Type: GrantFiled: July 18, 2014Date of Patent: March 3, 2020Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DOWA HOLDINGS CO., LTD.Inventors: Takayuki Uchiyama, Nariaki Miki, Yoshiaki Aiki, Koji Tanoue
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Publication number: 20190372103Abstract: Provided is a cathode that is configured to decrease battery resistance when it is used in an all-solid-state battery, and a method for producing the cathode. Disclosed is a cathode comprising a cathode layer for all-solid-state batteries, wherein the cathode layer contains cathode active material particles and solid electrolyte particles; wherein at least one of the cathode active material particles and the solid electrolyte particles contain a phosphorus element; and wherein, in a photoelectron spectrum by X-ray photoelectron spectroscopy measurement of the cathode layer, a P peak intensity ratio (A/B), which is derived from the phosphorus element, of a signal intensity A at a binding energy of 131.6 eV to a signal intensity B at a binding energy of 133.1 eV, is larger than 0.58.Type: ApplicationFiled: May 9, 2019Publication date: December 5, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Nariaki MIKI
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Publication number: 20190372102Abstract: Provided is a cathode that is configured to decrease battery resistance when it is used in an all-solid-state battery, and a method for producing the cathode. Disclosed is a cathode comprising a cathode layer for all-solid-state batteries, wherein the cathode layer contains cathode active material particles and solid electrolyte particles; wherein at least one of the cathode active material particles and the solid electrolyte particles contain a sulfur element; and wherein, in a photoelectron spectrum by X-ray photoelectron spectroscopy measurement of the cathode layer, an S peak intensity ratio (C/D), which is derived from the sulfur element, of a signal intensity C at a binding energy of 161.6 eV to a signal intensity D at a binding energy of 163.1 eV, is larger than 0.78.Type: ApplicationFiled: May 9, 2019Publication date: December 5, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Nariaki MIKI
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Patent number: 10305096Abstract: The present invention is to provide an electrode active material and a method for producing the same capable of preventing production of foreign substance, poor coating and deterioration of electrode active material upon covering the surface of the electrode active material with ion conductive oxide, decreasing battery resistance and having higher output of battery. Disclosed is a method for producing an electrode active material, the surface of which is covered with ion conductive oxide, comprising the steps of: preparing an alkoxide solution by mixing at least alkoxide compound and liquid water; and applying and drying the alkoxide solution on a surface of an electrode active material under dry atmosphere, and an electrode active material, the surface of which is covered with ion conductive oxide, wherein an area on the surface of the electrode active material occupied by a substance other than the ion conductive oxide is 21% or less.Type: GrantFiled: December 3, 2014Date of Patent: May 28, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Nariaki Miki
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Patent number: 10243209Abstract: An active material composite particle is capable of suppressing a reaction with a sulfide solid electrolyte material at high temperature. The active material composite particle may include an oxide active material of rock salt bed type and a coat layer containing lithium niobate formed on a surface of the oxide active material, wherein a thickness of the coat layer is in the range of 25 nm to 94 nm.Type: GrantFiled: April 5, 2016Date of Patent: March 26, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Nariaki Miki, Yuki Matsushita, Kouichi Sugiura
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Patent number: 10056607Abstract: Provided is an active material composite particle with which the reaction resistance of a battery can be reduced. The active material composite particle includes an active material and a lithium niobate layer formed on a surface of the active material, wherein the lithium niobate layer includes nitrogen.Type: GrantFiled: February 4, 2016Date of Patent: August 21, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Nariaki Miki
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Publication number: 20180219229Abstract: A composite active material particle that can reduce battery resistance when used in an all-solid-state lithium ion battery is disclosed. The composite active material particle comprises: an active material particle; and a lithium ion conducting oxide with which at least part of a surface of the active material particle is coated, wherein the moisture content in the composite active material particle is no more than 319 ppm.Type: ApplicationFiled: January 8, 2018Publication date: August 2, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Nariaki Miki
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Patent number: 9941514Abstract: A cathode active material layer used for an all solid lithium battery, comprising a flat cathode active material with a hollowness in a range of more than 0% to 10%, and a solid electrolyte material, characterized in that the flat cathode active material has an aspect ratio (long axis length/short axis length) of 1.5 or more in a section in a thickness direction of the cathode active material layer, and a ratio of the flat cathode active material of which the short axis direction corresponds to a thickness direction of the cathode active material layer is 30% or more with respect to the whole cathode active material.Type: GrantFiled: June 23, 2016Date of Patent: April 10, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomoya Suzuki, Hajime Hasegawa, Nariaki Miki