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1.发明公开公开(公告)号：US20240092655A1
公开(公告)日：2024-03-21
申请号：US18263740
申请日：2022-01-21
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Shunpei YAMAZAKI , Yusuke YOSHITANI , Yohei MOMMA , Kunihiro FUKUSHIMA , Tetsuya KAKEHATA
IPC: C01G51/00
CPC classification number: C01G51/42
Abstract: A novel method for forming a positive electrode active material is provided. In the method for forming a positive electrode active material, a cobalt source and an additive element source are mixed to form an acidic solution; the acidic solution and an alkaline solution are made to react to form a cobalt compound; the cobalt compound and a lithium source are mixed to form a mixture; and the mixture is heated. The additive element source is a compound containing one or more selected from gallium, aluminum, boron, nickel, and indium.
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公开(公告)号：US20230286825A1
公开(公告)日：2023-09-14
申请号：US18040286
申请日：2021-08-06
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Shunpei YAMAZAKI , Tetsuya KAKEHATA , Tetsuji ISHITANI , Yohei MOMMA , Yusuke YOSHITANI
IPC: C01G53/00
CPC classification number: C01G53/44 , C01P2006/40
Abstract: A manufacturing method of a highly purified positive electrode active material is provided. Alternatively, a manufacturing method of a positive electrode active material whose crystal structure is not easily broken even when charging and discharging are repeated is provided. Provided is a manufacturing method of a positive electrode active material containing lithium and a transition metal. The manufacturing method includes a first step of forming a hydroxide containing the transition metal using a basic aqueous solution and an aqueous solution containing the transition metal, a second step of preparing a lithium compound, a third step of mixing the lithium compound and the hydroxide to form a mixture, and a fourth step of heating the mixture to form a composite oxide containing lithium and the transition metal. A material with a purity higher than or equal to 99.99% is prepared as the lithium compound in the second step, and the heating is performed in an oxygen-containing atmosphere with a dew point lower than or equal to −50° C. in the fourth step.
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公开(公告)号：US20230246183A1
公开(公告)日：2023-08-03
申请号：US18007789
申请日：2021-06-02
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Jo SAITO , Yohei MOMMA , Mayumi MIKAMI , Teruaki OCHIAI , Yusuke YOSHITANI , Azusa KIKUCHI , Kazuhei NARITA
CPC classification number: H01M4/525 , H01M4/366 , H01M4/131 , C01G53/66 , H01M2004/028
Abstract: According to one embodiment of the present invention, a positive electrode active material with high charge and discharge capacity is provided. Alternatively, a positive electrode active material with high charge and discharge voltage is provided. Alternatively, a positive electrode active material with little deterioration is provided. To improve the reliability of the positive electrode active material, the surface of the positive electrode active material is prevented from reacting with an electrolyte solution and being reduced. The provision of a projection on part of the positive electrode active material surface decreases the reduction of the positive electrode active material surface from reacting with the electrolyte solution, thereby improving the cycle performance.
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公开(公告)号：US20220326740A1
公开(公告)日：2022-10-13
申请号：US17845233
申请日：2022-06-21
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Yusuke YOSHITANI , Hideaki KUWABARA , Natsuko TAKASE
Abstract: A highly convenient electronic device used while being worn on a body is provided. The electronic device is an arm-worn electronic device including a display panel, a power storage device, a circuit, and a sealing structure. The display panel displays an image with power supplied from the power storage device. The circuit includes an antenna and charges the power storage device wirelessly. Inside the sealing structure, the display panel, the power storage device, and the circuit are provided. The sealing structure includes a portion that transmits visible light. The sealing structure can be worn on an arm or is connected to a structure body that can be worn on an arm.
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公开(公告)号：US20240322159A1
公开(公告)日：2024-09-26
申请号：US18580290
申请日：2022-07-08
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Yusuke YOSHITANI , Daichi HIGO , Takashi HIRAHARA , Noriko MIYAIRI
CPC classification number: H01M4/525 , H01M4/0471 , H01M4/505 , H01M2004/028
Abstract: A positive electrode active material with high charge and discharge capacity is provided. Alternatively, a novel positive electrode active material is provided. A compound containing nickel, cobalt, manganese, and aluminum (also referred to as a precursor) is obtained by using a coprecipitation method, and then, a mixture in which a lithium compound and the compound containing nickel, cobalt, manganese, and aluminum are mixed is heated at a first heating temperature. After the mixture is ground or crushed, the mixture is further heated at a second heating temperature, and an additive is mixed therein. Then, a third heat treatment is performed to manufacture a positive electrode active material.
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Patent Agency Ranking
公开(公告)号：US20230317940A1
公开(公告)日：2023-10-05
申请号：US18019563
申请日：2021-07-26
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Jo Saito , Yohei MOMMA , Teruaki OCHIAI , Yusuke YOSHITANI , Mayumi MIKAMI
IPC: H01M4/525 , H01M10/0525 , H01M4/04 , H01M10/0587
CPC classification number: H01M4/525 , H01M10/0525 , H01M4/0471 , H01M4/0416 , H01M10/0587 , H01M2220/20 , H01M2004/028
Abstract: A secondary battery and a positive electrode active material each having high energy density per weight and per volume are provided. The secondary battery includes a positive electrode, the positive electrode includes lithium cobalt oxide, and the lithium cobalt oxide has a projection containing at least one or two or more selected from Hf, V, Nb, Ce, and Sm. The projection may further contain Mg, F, Ni, or Al as an additive element. The secondary battery is manufactured through a step of forming a mixed solution by mixing the lithium cobalt oxide and a metal alkoxide containing one or two or more selected from Hf, V, Nb, Ce, and Sm. With such a positive electrode active material, a secondary battery with a high charge voltage can be provided.
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公开(公告)号：US20200076223A1
公开(公告)日：2020-03-05
申请号：US16610931
申请日：2018-05-11
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Kazutaka KURIKI , Ryota TAJIMA , Hideaki SHISHIDO , Yusuke YOSHITANI , Haruki KATAGIRI , Yohei MOMMA
IPC: H02J7/04 , H02J7/02 , H02J7/00 , H02J50/20 , H02J50/80 , B60L53/12 , B60L50/60 , B60L53/62 , G05B13/02 , H01M10/46 , H01M10/44
Abstract: A charging control device using machine learning is provided. A high-security charging control device is provided. A charging control system with little deterioration is provided. A storage battery having excellent characteristics is provided.An approximate charging end time is calculated. A result obtained when it is different from the estimated charging end time is fed back and learned, and accordingly the charging end can be precisely estimated after the next time. That is, the portable information terminal makes a charging plan with the use of artificial intelligence and the secondary battery is charged based on information about the charging plan. The charging plan is made to reduce the retention time of the full charging (SOC 100%) and charging is executed. Charging history information is stored in the portable information terminal and made use of to make the next charging plan.
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8.发明公开公开(公告)号：US20240092658A1
公开(公告)日：2024-03-21
申请号：US18264266
申请日：2022-02-01
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Yusuke YOSHITANI , Takashi HIRAHARA , Noriko MIYAIRI , Masahiko HAYAKAWA , Yohei MOMMA
IPC: C01G53/00
CPC classification number: C01G53/50
Abstract: A positive electrode active material with high charge and discharge capacity is provided. A novel positive electrode active material is provided. The positive electrode active material is manufactured in such a manner that after a cobalt compound (also referred to as a precursor) containing nickel, cobalt, and manganese is obtained by a coprecipitation method, a mixture obtained by mixing a lithium compound and the cobalt compound is heated at a first temperature; after the mixture is ground or crushed, heating at a second temperature that is a temperature higher than the first temperature is further performed; and after an additive is mixed, third heat treatment is performed. The first temperature is higher than or equal to 400° C. and lower than or equal to 700° C. The second temperature is higher than 700° C. and lower than or equal to 1050° C.
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9.发明公开公开(公告)号：US20230307628A1
公开(公告)日：2023-09-28
申请号：US18017893
申请日：2021-07-28
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Jo SAITO , Yohei MOMMA , Teruaki OCHIAI , Yusuke YOSHITANI , Kanta ABE , Kazuki TANEMURA , Shunpei YAMAZAKI
CPC classification number: H01M4/525 , H01M4/0471 , H01M4/505 , H01M4/625 , H01M2004/028
Abstract: A positive electrode active material having a crystal structure that is unlikely to be broken by repeated charging and discharging is provided. A positive electrode active material with high charge and discharge capacity is provided. A projection is provided on the surface of the positive electrode active material. The projection preferably contains zirconium and yttrium and is a rectangular solid. The projection preferably has a crystal structure that is tetragonal, cubic, or a mixture of two phases, tetragonal and cubic. In the positive electrode active material, the transition metal is one or two or more selected from cobalt, nickel, and manganese, and the additive elements are at least two or more selected from magnesium, fluorine, aluminum, zirconium, and yttrium.
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公开(公告)号：US20170250156A1
公开(公告)日：2017-08-31
申请号：US15434489
申请日：2017-02-16
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Akio ENDO , Yusuke YOSHITANI , Jun KOYAMA , Naoto KUSUMOTO
Abstract: An imaging system using ultraviolet light or a manufacturing apparatus including the imaging system is provided. An imaging system includes an imaging element and a light source, which operates the imaging element with light that is emitted from the light source and reflected or transmitted by an object. A pixel included in the imaging element includes a photoelectric conversion element and a charge holding part. The light source has a function of emitting ultraviolet light to an object. The photoelectric conversion element is irradiated with the ultraviolet light reflected or transmitted by the object. The photoelectric conversion element has a function of changing the potential of the charge holding part when irradiated with the ultraviolet light and retaining the potential when not irradiated with the ultraviolet light.
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