Patents by Inventor Ai NAKAGAWA
Ai NAKAGAWA 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: 20240087820Abstract: A repeatedly bendable power storage device. A highly reliable power storage device. A long-life power storage device. A repeatedly bendable electronic device. A flexible electronic device. The power storage device includes a film, a positive electrode, and a negative electrode. The film includes a plurality of projections. A difference between the maximum height and the minimum height of a surface of the film is greater than or equal to 0.15 mm and less than 0.8 mm. The modulus of rigidity of the film is less than 6.5×109 N. The film includes a metal layer. The thickness of the metal layer is greater than or equal to 5 ?m and less than or equal to 200 ?m. The positive electrode and the negative electrode are surrounded by the film.Type: ApplicationFiled: August 24, 2023Publication date: March 14, 2024Inventors: Junya GOTO, Ai NAKAGAWA, Yuika SATO
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Patent number: 11742155Abstract: A repeatedly bendable power storage device. A highly reliable power storage device. A long-life power storage device. A repeatedly bendable electronic device. A flexible electronic device. The power storage device includes a film, a positive electrode, and a negative electrode. The film includes a plurality of projections. A difference between the maximum height and the minimum height of a surface of the film is greater than or equal to 0.15 mm and less than 0.8 mm. The modulus of rigidity of the film is less than 6.5×109 N. The film includes a metal layer. The thickness of the metal layer is greater than or equal to 5 ?m and less than or equal to 200 ?m. The positive electrode and the negative electrode are surrounded by the film.Type: GrantFiled: June 15, 2022Date of Patent: August 29, 2023Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Junya Goto, Ai Nakagawa, Yuika Sato
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Publication number: 20220328910Abstract: A repeatedly bendable power storage device. A highly reliable power storage device. A long-life power storage device. A repeatedly bendable electronic device. A flexible electronic device. The power storage device includes a film, a positive electrode, and a negative electrode. The film includes a plurality of projections. A difference between the maximum height and the minimum height of a surface of the film is greater than or equal to 0.15 mm and less than 0.8 mm. The modulus of rigidity of the film is less than 6.5×109 N. The film includes a metal layer. The thickness of the metal layer is greater than or equal to 5 ?m and less than or equal to 200 ?m. The positive electrode and the negative electrode are surrounded by the film.Type: ApplicationFiled: June 15, 2022Publication date: October 13, 2022Inventors: Junya GOTO, Ai NAKAGAWA, Yuika SATO
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Publication number: 20220285691Abstract: Provided is an electrode including a current collector and an active material layer. The active material layer includes an active material, a film including silicone, a conductive additive, and a binder. The active material is in the form of a particle. The film including silicone covers at least part of the active material.Type: ApplicationFiled: March 28, 2022Publication date: September 8, 2022Inventors: Tatsuya IKENUMA, Kazutaka KURIKI, Ai NAKAGAWA
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Patent number: 11380951Abstract: A repeatedly bendable power storage device. A highly reliable power storage device. A long-life power storage device. A repeatedly bendable electronic device. A flexible electronic device. The power storage device includes a film, a positive electrode, and a negative electrode. The film includes a plurality of projections. A difference between the maximum height and the minimum height of a surface of the film is greater than or equal to 0.15 mm and less than 0.8 mm. The modulus of rigidity of the film is less than 6.5×109 N. The film includes a metal layer. The thickness of the metal layer is greater than or equal to 5 ?m and less than or equal to 200 ?m. The positive electrode and the negative electrode are surrounded by the film.Type: GrantFiled: June 2, 2020Date of Patent: July 5, 2022Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Junya Goto, Ai Nakagawa, Yuika Sato
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Patent number: 11355784Abstract: In initial charge and discharge, decomposition products or a gas is generated, degrading a battery. At least one of solvents (e.g., ethylene carbonate) used for an electrolytic solution is brought into contact with a positive electrode and a negative electrode and then charge is performed to some degree, and after that, a different solvent or electrolytic solution (e.g., ethyl methyl carbonate or vinylene carbonate) was added to adjust the electrolytic solution and then charge is performed. Through this process, stable coating films are formed in initial charge and discharge, which stably inhibits a side reaction between the electrolytic solution and an active material.Type: GrantFiled: October 24, 2019Date of Patent: June 7, 2022Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Teppei Oguni, Junya Goto, Ai Nakagawa
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Patent number: 11322745Abstract: Provided is an electrode including a current collector and an active material layer. The active material layer includes an active material, a film including silicone, a conductive additive, and a binder. The active material is in the form of a particle. The film including silicone covers at least part of the active material.Type: GrantFiled: October 9, 2015Date of Patent: May 3, 2022Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Tatsuya Ikenuma, Kazutaka Kuriki, Ai Nakagawa
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Publication number: 20200295314Abstract: A repeatedly bendable power storage device. A highly reliable power storage device. A long-life power storage device. A repeatedly bendable electronic device. A flexible electronic device. The power storage device includes a film, a positive electrode, and a negative electrode. The film includes a plurality of projections. A difference between the maximum height and the minimum height of a surface of the film is greater than or equal to 0.15 mm and less than 0.8 mm. The modulus of rigidity of the film is less than 6.5×109 N. The film includes a metal layer. The thickness of the metal layer is greater than or equal to 5 ?m and less than or equal to 200 ?m. The positive electrode and the negative electrode are surrounded by the film.Type: ApplicationFiled: June 2, 2020Publication date: September 17, 2020Inventors: Junya GOTO, Ai NAKAGAWA, Yuika SATO
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Patent number: 10686167Abstract: A repeatedly bendable power storage device. A highly reliable power storage device. A long-life power storage device. A repeatedly bendable electronic device. A flexible electronic device. The power storage device includes a film, a positive electrode, and a negative electrode. The film includes a plurality of projections. A difference between the maximum height and the minimum height of a surface of the film is greater than or equal to 0.15 mm and less than 0.8 mm. The modulus of rigidity of the film is less than 6.5×109 N. The film includes a metal layer. The thickness of the metal layer is greater than or equal to 5 ?m and less than or equal to 200 ?m. The positive electrode and the negative electrode are surrounded by the film.Type: GrantFiled: July 21, 2016Date of Patent: June 16, 2020Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Junya Goto, Ai Nakagawa, Yuika Sato
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Publication number: 20200058954Abstract: In initial charge and discharge, decomposition products or a gas is generated, degrading a battery. At least one of solvents (e.g., ethylene carbonate) used for an electrolytic solution is brought into contact with a positive electrode and a negative electrode and then charge is performed to some degree, and after that, a different solvent or electrolytic solution (e.g., ethyl methyl carbonate or vinylene carbonate) was added to adjust the electrolytic solution and then charge is performed. Through this process, stable coating films are formed in initial charge and discharge, which stably inhibits a side reaction between the electrolytic solution and an active material.Type: ApplicationFiled: October 24, 2019Publication date: February 20, 2020Inventors: Teppei OGUNI, Junya GOTO, Ai NAKAGAWA
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Patent number: 10535844Abstract: A repeatedly bendable power storage device is provided. A highly reliable power storage device is provided. A long-life power storage device is provided. A repeatedly bendable electronic device is provided. A flexible electronic device is provided. The power storage device includes a positive electrode, a negative electrode, and an exterior body wrapping the positive electrode and the negative electrode. The exterior body includes a metal layer and a resin layer. The thickness of the metal layer in at least part of an outer edge of the exterior body is smaller than that in a region other than the outer edge. The exterior body has a plurality of slits in the outer edge.Type: GrantFiled: February 22, 2017Date of Patent: January 14, 2020Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Junya Goto, Ai Nakagawa, Yuika Sato
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Patent number: 10497982Abstract: In initial charge and discharge, decomposition products or a gas is generated, degrading a battery. At least one of solvents (e.g., ethylene carbonate) used for an electrolytic solution is brought into contact with a positive electrode and a negative electrode and then charge is performed to some degree, and after that, a different solvent or electrolytic solution (e.g., ethyl methyl carbonate or vinylene carbonate) was added to adjust the electrolytic solution and then charge is performed. Through this process, stable coating films are formed in initial charge and discharge, which stably inhibits a side reaction between the electrolytic solution and an active material.Type: GrantFiled: May 4, 2017Date of Patent: December 3, 2019Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Teppei Oguni, Junya Goto, Ai Nakagawa
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Patent number: 10354810Abstract: The cycle performance of a lithium-ion secondary battery or a lithium-ion capacitor can be obtained by minimizing the decomposition reaction of an electrolytic solution, etc. in the repeated charge and discharge cycles of the lithium-ion secondary battery or the lithium-ion capacitor. An electrode includes a current collector and an active material layer over the current collector. The active material layer includes active material particles, a conductive additive, a binder, and a film containing silicon oxide as its main component. The surface of one of the active material particles includes at least one of a region in contact with the surface of another active material particle, a region in contact with the conductive additive, and a region in contact with the binder. The surface of the active material particle except these regions is at least partly in contact with the film containing silicon oxide as its main component.Type: GrantFiled: March 11, 2015Date of Patent: July 16, 2019Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Tatsuya Ikenuma, Kazutaka Kuriki, Ai Nakagawa
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Patent number: 10128529Abstract: A lithium-ion secondary battery with a high capacity retention rate is provided. In addition, a fabricating method of a lithium-ion secondary battery with a high capacity retention rate is provided. The lithium-ion secondary battery includes a positive electrode, a negative electrode, and an electrolyte solution. The negative electrode includes a negative electrode active material layer. The electrolyte solution includes at least one of lithium bis(trifluoromethanesulfonyl)amide (LiTFSA) and lithium bis(fluorosulfonyl)amide (LiFSA). The electrolyte solution includes vinylene carbonate (VC). A coating film including lithium oxide is on a surface of the negative electrode active material layer.Type: GrantFiled: November 9, 2016Date of Patent: November 13, 2018Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Ai Nakagawa, Teppei Oguni, Kai Kimura, Rika Yatabe
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Publication number: 20170331144Abstract: In initial charge and discharge, decomposition products or a gas is generated, degrading a battery. At least one of solvents (e.g., ethylene carbonate) used for an electrolytic solution is brought into contact with a positive electrode and a negative electrode and then charge is performed to some degree, and after that, a different solvent or electrolytic solution (e.g., ethyl methyl carbonate or vinylene carbonate) was added to adjust the electrolytic solution and then charge is performed. Through this process, stable coating films are formed in initial charge and discharge, which stably inhibits a side reaction between the electrolytic solution and an active material.Type: ApplicationFiled: May 4, 2017Publication date: November 16, 2017Inventors: Teppei OGUNI, Junya GOTO, Ai NAKAGAWA
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Publication number: 20170250383Abstract: A repeatedly bendable power storage device is provided. A highly reliable power storage device is provided. A long-life power storage device is provided. A repeatedly bendable electronic device is provided. A flexible electronic device is provided. The power storage device includes a positive electrode, a negative electrode, and an exterior body wrapping the positive electrode and the negative electrode. The exterior body includes a metal layer and a resin layer. The thickness of the metal layer in at least part of an outer edge of the exterior body is smaller than that in a region other than the outer edge. The exterior body has a plurality of slits in the outer edge.Type: ApplicationFiled: February 22, 2017Publication date: August 31, 2017Inventors: Junya GOTO, Ai NAKAGAWA, Yuika SATO
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Publication number: 20170141428Abstract: A lithium-ion secondary battery with a high capacity retention rate is provided. In addition, a fabricating method of a lithium-ion secondary battery with a high capacity retention rate is provided. The lithium-ion secondary battery includes a positive electrode, a negative electrode, and an electrolyte solution. The negative electrode includes a negative electrode active material layer. The electrolyte solution includes at least one of lithium bis(trifluoromethanesulfonyl)amide (LiTFSA) and lithium bis(fluorosulfonyl)amide (LiFSA). The electrolyte solution includes vinylene carbonate (VC). A coating film including lithium oxide is on a surface of the negative electrode active material layer.Type: ApplicationFiled: November 9, 2016Publication date: May 18, 2017Inventors: Ai NAKAGAWA, Teppei OGUNI, Kai KIMURA, Rika YATABE
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Publication number: 20170117589Abstract: To provide a power storage device whose charging and discharging characteristics are unlikely to be degraded by heat treatment. To provide a power storage device that is highly safe against heat treatment. The power storage device includes a positive electrode, a negative electrode, a separator, an electrolytic solution, and an exterior body. The separator is located between the positive electrode and the negative electrode. The separator contains polyphenylene sulfide. The electrolytic solution contains a solute and two or more kinds of solvents. The solute contains LiFSA at a concentration of higher than or equal to 0.1 wt % and lower than or equal to 50 wt % in the electrolytic solution. One of the solvents is propylene carbonate.Type: ApplicationFiled: October 26, 2016Publication date: April 27, 2017Inventors: Ryota TAJIMA, Teppei OGUNI, Kazuhei NARITA, Junya GOTO, Ai NAKAGAWA, Minoru TAKAHASHI
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Publication number: 20170033326Abstract: A repeatedly bendable power storage device. A highly reliable power storage device. A long-life power storage device. A repeatedly bendable electronic device. A flexible electronic device. The power storage device includes a film, a positive electrode, and a negative electrode. The film includes a plurality of projections. A difference between the maximum height and the minimum height of a surface of the film is greater than or equal to 0.15 mm and less than 0.8 mm. The modulus of rigidity of the film is less than 6.5×109 N. The film includes a metal layer. The thickness of the metal layer is greater than or equal to 5 ?m and less than or equal to 200 ?m. The positive electrode and the negative electrode are surrounded by the film.Type: ApplicationFiled: July 21, 2016Publication date: February 2, 2017Inventors: Junya GOTO, Ai NAKAGAWA, Yuika SATO
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Publication number: 20160118689Abstract: A lithium-ion storage battery with a favorable cycle life at high temperatures is provided. A lithium-ion storage battery with a longer lifetime due to reduction of the capacity decrease is provided. A lithium-ion storage battery where reaction between a positive electrode active material and an electrolyte in an electrolyte solution is inhibited is provided. One embodiment of the present invention is a lithium-ion storage battery including a positive electrode, a negative electrode, an electrolyte solution. The positive electrode includes an active material, the active material includes a metal, and the electrolyte solution includes at least one of LiTFSA and LiFSA. Note that, in the lithium-ion storage battery of one embodiment of the present invention, the positive electrode may include a current collector, and the current collector may include Al. In the lithium-ion storage battery, the electrolyte solution may further include LiPF6.Type: ApplicationFiled: October 22, 2015Publication date: April 28, 2016Inventors: Teppei OGUNI, Kazutaka KURIKI, Ai NAKAGAWA, Aya UCHIDA