Patents by Inventor Akihiro YAMANO
Akihiro YAMANO 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: 11201326Abstract: An object of the present disclosure is to provide a secondary battery having excellent cyclability by using a sulfur-based active material as a negative-electrode active material while preventing a reaction between an eluted polysulfide and a positive electrode. The metal-ion secondary battery comprises a negative electrode comprising a sulfur-containing compound as a negative-electrode active material, a positive electrode and an electrolyte, and has a polymer gel layer on a surface of the positive electrode.Type: GrantFiled: October 8, 2019Date of Patent: December 14, 2021Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Tatsuya Kubo, Akihiro Yamano, Masanori Morishita, Tetsuo Sakai, Hideya Yoshitake
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Patent number: 11088391Abstract: Provided is a lithium ion battery whose manufacturing process is simple and which has high energy density and heat resistance.Type: GrantFiled: October 19, 2015Date of Patent: August 10, 2021Assignees: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, MURATA MANUFACTURING CO., LTD.Inventors: Akihiro Yamano, Tetsuo Sakai, Masahiro Yanagida, Masanori Morishita, Masashi Higuchi
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Patent number: 10847279Abstract: An object of the present invention is to provide a novel sulfur-based positive-electrode active material which can largely improve cyclability of a lithium-ion secondary battery, a positive electrode comprising the positive-electrode active material and a lithium-ion secondary battery comprising the positive electrode. The sulfur-based positive-electrode active material is one comprising: a carbon skeleton derived from a polymer composed of a monomer unit having at least one hetero atom-containing moiety, and sulfur incorporated into the carbon skeleton as the carbon skeleton is formed from the polymer by heat treatment.Type: GrantFiled: March 11, 2019Date of Patent: November 24, 2020Assignees: SUMITOMO RUBBER INDUSTRIES, LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Tatsuya Kubo, Toshikatsu Kojima, Tetsuo Sakai, Akihiro Yamano, Masahiro Yanagida
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Publication number: 20200044251Abstract: An object of the present disclosure is to provide a secondary battery having excellent cyclability by using a sulfur-based active material as a negative-electrode active material while preventing a reaction between an eluted polysulfide and a positive electrode. The metal-ion secondary battery comprises a negative electrode comprising a sulfur-containing compound as a negative-electrode active material, a positive electrode and an electrolyte, and has a polymer gel layer on a surface of the positive electrode.Type: ApplicationFiled: October 8, 2019Publication date: February 6, 2020Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Tatsuya KUBO, Akihiro YAMANO, Masanori MORISHITA, Tetsuo SAKAI, Hideya YOSHITAKE
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Patent number: 10505194Abstract: An object of the present invention is to provide a novel positive electrode which is produced using a rubber being an inexpensive material and is capable of enhancing a charge and discharge capacity and cyclability of a lithium-ion secondary battery, and the lithium-ion secondary battery composed of the positive electrode. In the lithium-ion secondary battery, the positive electrode comprises a current collector and an electrode layer formed on a surface of the current collector, the electrode layer comprises an active material, an electrically-conductive additive and a thermosetting resin binder subjected to thermosetting, and the active material comprises a sulfur-based positive-electrode active material prepared by heat-treating a starting material comprising a rubber and sulfur under a non-oxidizing atmosphere.Type: GrantFiled: February 28, 2019Date of Patent: December 10, 2019Assignees: SUMITOMO RUBBER INDUSTRIES, LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Tatsuya Kubo, Akihiro Yamano, Naoto Yamashita, Toshikatsu Kojima, Masahiro Yanagida
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Publication number: 20190207210Abstract: An object of the present invention is to provide a novel sulfur-based positive-electrode active material which can largely improve cyclability of a lithium-ion secondary battery, a positive electrode comprising the positive-electrode active material and a lithium-ion secondary battery comprising the positive electrode. The sulfur-based positive-electrode active material is one comprising: a carbon skeleton derived from a polymer composed of a monomer unit having at least one hetero atom-containing moiety, and sulfur incorporated into the carbon skeleton as the carbon skeleton is formed from the polymer by heat treatment.Type: ApplicationFiled: March 11, 2019Publication date: July 4, 2019Applicants: SUMITOMO RUBBER INDUSTRIES, LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Tatsuya KUBO, Toshikatsu KOJIMA, Tetsuo SAKAI, Akihiro YAMANO, Masahiro YANAGIDA
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Publication number: 20190198877Abstract: An object of the present invention is to provide a novel positive electrode which is produced using a rubber being an inexpensive material and is capable of enhancing a charge and discharge capacity and cyclability of a lithium-ion secondary battery, and the lithium-ion secondary battery composed of the positive electrode. In the lithium-ion secondary battery, the positive electrode comprises a current collector and an electrode layer formed on a surface of the current collector, the electrode layer comprises an active material, an electrically-conductive additive and a thermosetting resin binder subjected to thermosetting, and the active material comprises a sulfur-based positive-electrode active material prepared by heat-treating a starting material comprising a rubber and sulfur under a non-oxidizing atmosphere.Type: ApplicationFiled: February 28, 2019Publication date: June 27, 2019Applicants: SUMITOMO RUBBER INDUSTRIES, LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Tatsuya KUBO, Akihiro YAMANO, Naoto YAMASHITA, Toshikatsu KOJIMA, Masahiro YANAGIDA
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Patent number: 10326134Abstract: An object of the present invention is to provide a novel sulfur-based positive electrode active material for a lithium-ion secondary battery which is excellent in cyclability and can largely improve a charging and discharging capacity, a positive electrode comprising the positive electrode active material and a lithium-ion secondary battery made using the positive electrode. The sulfur-based positive electrode active material is obtainable by subjecting a starting material comprising a polymer, sulfur and an organometallic compound dispersed in a form of fine particles to heat-treatment under a non-oxidizing atmosphere, wherein the particles of metallic sulfide resulting from sulfurization of the organometallic compound are dispersed in the heat-treated material, and particle size of the metallic sulfide particles is not less than 10 nm and less than 100 nm.Type: GrantFiled: March 6, 2017Date of Patent: June 18, 2019Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Tatsuya Kubo, Akihiro Yamano, Naoto Yamashita, Masahiro Yanagida
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Publication number: 20190148778Abstract: An object of the present invention is to provide a method of manufacturing a high capacity lithium ion battery device by safe and simple doping operation. A method of manufacturing a lithium ion battery device comprising a positive electrode and a negative electrode which are laminated with each other, wherein an active material used on the positive electrode is a sulfur-based active material having a total sulfur content of not less than 50% by mass measured by an elementary analysis, the method comprising: a step of forming through-holes penetrating in a thickness direction of the positive electrodes and the negative electrodes, a step of laminating the positive electrodes with the negative electrode and disposing a lithium ion feeding source on at least one side of a laminating direction, and a step of allowing lithium derived from the lithium ion feeding source to be carried on the positive electrode and the negative electrode.Type: ApplicationFiled: October 11, 2018Publication date: May 16, 2019Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Tatsuya KUBO, Fumiya CHUJO, Akihiro YAMANO, Masanori MORISHITA, Tetsuo SAKAI
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Publication number: 20180151879Abstract: An object of the present disclosure is to provide a secondary battery having excellent cyclability by using a sulfur-based active material as a negative-electrode active material while preventing a reaction between an elated polysulfide and a positive electrode. The metal-ion secondary battery comprises a negative electrode comprising a sulfur-containing compound as a negative-electrode active material, a positive electrode and an electrolyte, and has a polymer gel layer on a surface of the positive electrode.Type: ApplicationFiled: October 25, 2017Publication date: May 31, 2018Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Tatsuya KUBO, Akihiro YAMANO, Masanori MORISHITA, Tetsuo SAKAI, Hideya YOSHITAKE
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Publication number: 20170338511Abstract: Provided is a lithium ion battery whose manufacturing process is simple and which has high energy density and heat resistance.Type: ApplicationFiled: October 19, 2015Publication date: November 23, 2017Inventors: Akihiro YAMANO, Tetsuo SAKAI, Masahiro YANAGIDA, Masanori MORISHITA, Masashi HIGUCHI
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Publication number: 20170288225Abstract: An object of the present invention is to provide a novel sulfur-based positive electrode active material for a lithium-ion secondary battery which is excellent in cyclability and can largely improve a charging and discharging capacity, a positive electrode comprising the positive electrode active material and a lithium-ion secondary battery made using the positive electrode. The sulfur-based positive electrode active material is obtainable by subjecting a starting material comprising a polymer, sulfur and an organometallic compound dispersed in a form of fine particles to heat-treatment under a non-oxidizing atmosphere, wherein the particles of metallic sulfide resulting from sulfurization of the organometallic compound are dispersed in the heat-treated material, and particle size of the metallic sulfide particles is not less than 10 nm and less than 100 nm.Type: ApplicationFiled: March 6, 2017Publication date: October 5, 2017Applicants: SUMITOMO RUBBER INDUSTRIES, LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Tatsuya KUBO, Akihiro YAMANO, Naoto YAMASHITA, Masahiro YANAGIDA
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Publication number: 20170149063Abstract: An object of the present invention is to provide a novel positive electrode which is produced using a rubber being an inexpensive material and is capable of enhancing a charge and discharge capacity and cyclability of a lithium-ion secondary battery, and the lithium-ion secondary battery composed of the positive electrode. In the lithium-ion secondary battery, the positive electrode comprises a current collector and an electrode layer formed on a surface of the current collector, the electrode layer comprises an active material, an electrically-conductive additive and a thermosetting resin binder subjected to thermosetting, and the active material comprises a sulfur-based positive-electrode active material prepared by heat-treating a starting material comprising a rubber and sulfur under a non-oxidizing atmosphere.Type: ApplicationFiled: October 20, 2016Publication date: May 25, 2017Applicants: SUMITOMO RUBBER INDUSTRIES, LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Tatsuya KUBO, Akihiro YAMANO, Naoto YAMASHITA, Toshikatsu KOJIMA, Masahiro YANAGIDA
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Publication number: 20170062809Abstract: An object of the present invention is to provide a novel sulfur-based positive-electrode active material which can largely improve cyclability of a lithium-ion secondary battery, a positive electrode comprising the positive-electrode active material and a lithium-ion secondary battery comprising the positive electrode. The sulfur-based positive-electrode active material is one comprising: a carbon skeleton derived from a polymer composed of a monomer unit having at least one hetero atom-containing moiety, and sulfur incorporated into the carbon skeleton as the carbon skeleton is formed from the polymer by heat treatment.Type: ApplicationFiled: August 3, 2016Publication date: March 2, 2017Applicants: SUMITOMO RUBBER INDUSTRIES, LTD., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Tatsuya KUBO, Toshikatsu KOJIMA, Tetsuo SAKAI, Akihiro YAMANO, Masahiro YANAGIDA