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公开(公告)号：US20240258497A1
公开(公告)日：2024-08-01
申请号：US18562365
申请日：2022-05-16
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Shunpei YAMAZAKI , Tetsuya KAKEHATA , Teppei OGUNI , Tatsuyoshi TAKAHASHI , Kazuya SHIMADA , Yohei MOMMA , Atsushi KAWATSUKI
CPC classification number: H01M4/13 , H01G11/24 , H01G11/56 , H01G11/66 , H01M4/366 , H01M4/624 , H01M2004/021 , H01M2004/028 , H01M2220/10 , H01M2220/20 , H01M2220/30
Abstract: Electrodes and a secondary battery having high capacity density and being excellent in terms of rapid charging and rapid discharging are provided. The battery includes a positive electrode and a negative electrode. The positive electrode includes a current collector, a first layer overlapping with the current collector, and a second layer overlapping with the first layer. The first layer contains a first active material with a first particle diameter and the second layer contains a second active material with a second particle diameter. The first particle diameter is smaller than the second particle diameter. It is preferable that the second active material include a surface portion and an inner portion, the surface portion be a region within a depth of 10 nm or less from a surface of the second active material to the inner portion, and that the surface portion and the inner portion be topotaxy.
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公开(公告)号：US20230327092A1
公开(公告)日：2023-10-12
申请号：US18004700
申请日：2021-07-01
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Kazutaka KURIKI , Tatsuyoshi TAKAHASHI , Yoshiharu ASADA , Daichi HIGO , Yuji IWAKI , Shunpei YAMAZAKI , Taisuke NAKAO , Teppei OGUNI
Abstract: An electrode with little deterioration or a secondary battery with little deterioration is provided. An electrode includes a first region and a second region. The first region includes a particle containing silicon. The second region includes a particle containing silicon and a graphene compound. The second region is in contact with the first region to cover at least part thereof. Alternatively, an electrode includes a plurality of particles containing silicon and a graphene compound. Each of the plurality of particles containing silicon includes a functional group containing oxygen and carbon, a functional group containing oxygen, or a fluorine atom in at least part of the surface. The graphene compound includes at least one of carbon terminated with hydrogen and carbon terminated with fluorine in a plane of the graphene compound. The graphene compound is in contact with the plurality of particles containing silicon to closely cling thereto. The particle containing silicon preferably contains amorphous silicon or polycrystalline silicon.
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公开(公告)号：US20220292880A1
公开(公告)日：2022-09-15
申请号：US17638359
申请日：2020-08-25
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Teppei OGUNI , Tatsuya OKANO , Kengo AKIMOTO
Abstract: An information processing system is provided. The information processing system includes first and second information processors. The first information processor obtains a first moving image including a face and detecting an eye from two or more first images among the first moving image. The first information processor detects a pupil from the eye detected from the first image, calculating its size, and performing learning using a change over time in the size of the pupil. The second information processor obtains a second moving image including a face and detecting an eye from two or more second images among the second moving image. The second information processor detects a pupil from the eye detected from the second image, calculating its size, and performing inference on the change over time in the size of the pupil on the basis of the result of the learning performed by the first information processor.
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公开(公告)号：US20200274165A1
公开(公告)日：2020-08-27
申请号：US15930707
申请日：2020-05-13
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Hiroatsu TODORIKI , Junpei MOMO , Teppei OGUNI , Nobuhiro INOUE
Abstract: To increase the conductivity and electric capacity of an electrode which includes active material particles and the like and is used in a battery, a graphene net including 1 to 100 graphene sheets is used instead of a conventionally used conduction auxiliary agent and binder. The graphene net which has a two-dimensional expansion and a three-dimensional structure is more likely to touch active material particles or another conduction auxiliary agent, thereby increasing the conductivity and the bonding strength between active material particles. This graphene net is obtained by mixing graphene oxide and active material particles and then heating the mixture in a vacuum or a reducing atmosphere.
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公开(公告)号：US20200156936A1
公开(公告)日：2020-05-21
申请号：US16751938
申请日：2020-01-24
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Teppei OGUNI , Takeshi OSADA , Toshihiko TAKEUCHI
IPC: B82Y30/00 , C25D13/22 , H01M10/0525 , H01M4/587 , H01M4/36 , H01M4/1395 , H01M4/1393 , H01M4/139 , H01M4/134 , H01M4/133 , H01M4/13 , H01M4/04 , C25D13/02
Abstract: To form graphene to a practically even thickness on an object having an uneven surface or a complex surface, in particular, an object having a surface with a three-dimensional structure due to complex unevenness, or an object having a curved surface. The object and an electrode are immersed in a graphene oxide solution, and voltage is applied between the object and the electrode. At this time, the object serves as an anode. Graphene oxide is attracted to the anode because of being negatively charged, and deposited on the surface of the object to have a practically even thickness A portion where graphene oxide is deposited is unlikely coated with another graphene oxide. Thus, deposited graphene oxide is reduced to graphene, whereby graphene can be formed to have a practically even thickness on an object having surface with complex unevenness.
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Patent Agency Ranking
公开(公告)号：US20190221848A1
公开(公告)日：2019-07-18
申请号：US16361416
申请日：2019-03-22
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Hiroatsu TODORIKI , Junpei MOMO , Teppei OGUNI , Nobuhiro INOUE
CPC classification number: H01M4/624 , H01M4/0404 , H01M4/0471 , H01M4/131 , H01M4/364 , H01M4/505 , H01M4/525 , H01M4/5825 , H01M4/587 , H01M4/625 , H01M4/627 , H01M10/052
Abstract: To increase the conductivity and electric capacity of an electrode which includes active material particles and the like and is used in a battery, a graphene net including 1 to 100 graphene sheets is used instead of a conventionally used conduction auxiliary agent and binder. The graphene net which has a two-dimensional expansion and a three-dimensional structure is more likely to touch active material particles or another conduction auxiliary agent, thereby increasing the conductivity and the bonding strength between active material particles. This graphene net is obtained by mixing graphene oxide and active material particles and then heating the mixture in a vacuum or a reducing atmosphere.
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7.发明申请公开(公告)号：US20180019466A1
公开(公告)日：2018-01-18
申请号：US15713732
申请日：2017-09-25
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Shunpei YAMAZAKI , Teppei OGUNI , Ryota TAJIMA
IPC: H01M4/36 , C01B33/027 , C01B33/113 , H01M4/04 , H01M4/38 , H01M10/0525
CPC classification number: H01M4/366 , C01B33/027 , C01B33/113 , H01M4/0421 , H01M4/386 , H01M10/0525
Abstract: To provide a lithium-ion secondary battery which has high charge and discharge capacity, is capable of being charged and discharged at high rate and has good cycle characteristics. A negative electrode includes a current collector and a negative electrode active material layer. The current collector includes a plurality of protrusion portions extending in the direction substantially perpendicular to the current collector and a base portion connected to the plurality of protrusion portions. The protrusion portions and the base portion are formed using the same material containing titanium. At least side surfaces of the protrusion portions are covered with the negative electrode active material layer. In the negative electrode active material layer, silicon layers and silicon oxide layers are alternately stacked between a plane where the protrusion portions are in contact with the negative electrode active material layer and a surface of the negative electrode active material layer.
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公开(公告)号：US20170338491A1
公开(公告)日：2017-11-23
申请号：US15668743
申请日：2017-08-04
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Kai KIMURA , Kazutaka KURIKI , Teppei OGUNI , Aya UCHIDA (Forme: HITOTSUYANAGI)
IPC: H01M4/62 , H01G11/28 , H01G11/38 , H01M4/13 , H01M10/0525 , H01M10/0566 , H01M4/133 , H01G11/26 , H01G11/24 , H01M10/42 , H01M10/44 , H01M4/02
CPC classification number: H01M4/622 , H01G11/24 , H01G11/26 , H01G11/28 , H01G11/38 , H01M4/13 , H01M4/133 , H01M4/62 , H01M10/0525 , H01M10/0566 , H01M10/446 , H01M2004/021 , H01M2010/4292 , H01M2220/20 , H01M2220/30 , Y02E60/122 , Y02E60/13 , Y02T10/7011 , Y02T10/7022
Abstract: A power storage device with high capacity or high energy density is provided. A highly reliable power storage device is provided. A long-life power storage device is provided. An electrode includes an active material, a first binder, and a second binder. The specific surface area of the active material is S [m2/g]. The weight of the active material, the weight of the first binder, and the weight of the second binder are a, b, and c, respectively. The solution of {(b+c)/(a+b+c)}×100÷S is 0.3 or more. The electrode includes a first film in contact with the active material. The first film preferably includes a region in contact with the active material. The first film preferably includes a region with a thickness of 2 nm or more and 20 nm or less. The first film contains a water-soluble polymer.
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9.发明申请公开(公告)号：US20170256817A1
公开(公告)日：2017-09-07
申请号：US15445433
申请日：2017-02-28
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Hiroshi KADOMA , Teppei OGUNI , Satoshi SEO
IPC: H01M10/0565 , H01M2/02 , H01M10/0525
CPC classification number: H01M10/0565 , C01B32/194 , C01B32/198 , C01B32/23 , C01B2204/22 , H01M2/0275 , H01M10/0525 , H01M10/0585 , H01M2300/0082 , Y02E60/122 , Y02P70/54 , Y02T10/7011
Abstract: A material that can be used in a wide temperature range is provided. A graphene compound includes graphene or graphene oxide and a substituted or unsubstituted chain group, the chain group includes two or more ether bonds, and the chain group is bonded to the above graphene or graphene oxide through a Si atom. Alternatively, a method for forming a graphene compound includes a first step and a second step after the first step. In the first step, graphene oxide and a base are stirred under a nitrogen stream. In the second step, the mixture is cooled to room temperature, a silylating agent that has a group having two or more ether bonds is introduced into the mixture, and the obtained mixture is stirred. The base is butylamine, pentylamine, hexylamine, diethylamine, dipropylamine, dibutylamine, triethylamine, tripropylamine, or pyridine.
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10.发明申请公开(公告)号：US20170237127A1
公开(公告)日：2017-08-17
申请号：US15519692
申请日：2015-10-15
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Jun ISHIKAWA , Kazuhei NARITA , Teppei OGUNI , Aya UCHIDA
IPC: H01M10/42 , H01G11/70 , H01G11/86 , H01G11/52 , H01M4/58 , H01G11/08 , H01M10/0525 , H01M4/66 , H01M4/04 , H01M4/587 , H01G11/28 , H01G11/68
CPC classification number: H01M10/4235 , H01G11/06 , H01G11/08 , H01G11/26 , H01G11/28 , H01G11/52 , H01G11/68 , H01G11/70 , H01G11/86 , H01M4/0404 , H01M4/0471 , H01M4/13 , H01M4/139 , H01M4/5825 , H01M4/587 , H01M4/66 , H01M4/661 , H01M4/667 , H01M10/0525 , H01M2004/021 , Y02T10/7011
Abstract: A power storage device with a high capacity is provided. A power storage device with a high energy density is provided. A highly reliable power storage device is provided. A power storage device with a long lifetime is provided.A method for manufacturing an electrode is characterized by including the steps of: mixing an active material, a binder, and a conductive additive to form a slurry; applying the slurry onto a current collector; drying the applied slurry to form an active material layer; and performing heat treatment in an atmosphere containing oxygen to form a film in contact with the current collector. The film is formed on a surface of the current collector where the active material layer is not provided and includes at least one component of the current collector and oxygen.
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