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公开(公告)号：US20230378459A1
公开(公告)日：2023-11-23
申请号：US18248103
申请日：2021-10-13
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Kazutaka KURIKI , Yumiko YONEDA , Shiori SAGA , Yoshiharu ASADA , Shunpei YAMAZAKI
IPC: H01M4/525 , H01M10/44 , H01M4/583 , H01M10/0569 , H01M4/133 , C07D233/58
CPC classification number: H01M4/525 , H01M10/44 , H01M4/583 , H01M10/0569 , H01M4/133 , C07D233/58 , H01M2004/028
Abstract: A lithium-ion secondary battery having high capacity and excellent charge and discharge cycle performance is provided. A secondary battery having high capacity is provided. A secondary battery with excellent charge and discharge characteristics is provided. A secondary battery in which a reduction in capacity is suppressed even when a state being charged with a high voltage is held for a long time is provided. In the secondary battery, after constant current charging is performed in an environment at 60° C. with a current value of 0.5 C until a voltage reaches 4.5 V, a charging process of performing constant voltage charging until a current value reaches 0.2 C and a discharging process of performing constant current discharging with a current value of 0.5 C until a voltage reaches 3 V are alternately repeated 150 or more times, and then discharging is performed, lithium cobalt oxide that is a surface portion of the positive electrode active material particle has an O3 structure, and an electrolyte includes an imidazolium cation.
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公开(公告)号：US20230352655A1
公开(公告)日：2023-11-02
申请号：US18003514
申请日：2021-06-29
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Kunihiko SUZUKI , Kengo AKIMOTO , Marina SUGANUMA , Yuji IWAKI , Kazutaka KURIKI , Taisuke NAKAO , Shunpei YAMAZAKI
CPC classification number: H01M4/364 , H01M4/583 , H01M4/386 , H01M2220/20
Abstract: An electrode with excellent characteristics is provided. An active material with excellent characteristics is provided. A novel silicon material is provided. An electrode includes a plurality of particles and a graphene compound. At least part of the surface of each of the plurality of particles is terminated by a functional group containing oxygen, the graphene compound contains the plurality of particles so as to cover the surrounding of the plurality of particles, and the graphene compound is graphene containing at least one of a carbon atom terminated by a hydrogen atom and a carbon atom terminated by a fluorine atom in a two-dimensional structure formed with a six-membered ring of carbon.
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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：US20230317925A1
公开(公告)日：2023-10-05
申请号：US18017189
申请日：2021-07-30
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Kazutaka KURIKI , Taisuke NAKAO , Yoshiharu ASADA , Yumiko YONEDA
CPC classification number: H01M4/366 , H01M4/0471 , H01M4/386 , H01M4/583 , H01M4/625 , H01M10/0525 , H01M2004/027
Abstract: A negative electrode with little deterioration is provided. A novel negative electrode is provided. A power storage device with little deterioration is provided. A novel power storage device is provided. The electrode contains silicon, graphite, and a graphene compound. A silicon particle with a particle diameter of less than or equal to 1 µm is attached to a graphite particle with a particle diameter 10 times or more that of the silicon particle. The graphene compound is in contact with the graphite particle so as to cover the silicon particle.
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75.发明公开公开(公告)号：US20230216019A1
公开(公告)日：2023-07-06
申请号：US18119422
申请日：2023-03-09
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Nobuhiro INOUE , Sachiko KATANIWA , Kazutaka KURIKI , Junpei MOMO
IPC: H01M4/583 , H01M10/0525 , H01M4/04
CPC classification number: H01M4/583 , H01M10/0525 , H01M4/0404 , H01M2004/027
Abstract: An object is to suppress electrochemical decomposition of an electrolyte solution and the like at a negative electrode in a lithium ion battery or a lithium ion capacitor; thus, irreversible capacity is reduced, cycle performance is improved, or operating temperature range is extended. A negative electrode for a power storage device including a negative electrode current collector, a negative electrode active material layer which is over the negative electrode current collector and includes a plurality of particles of a negative electrode active material, and a film covering part of the negative electrode active material. The film has an insulating property and lithium ion conductivity.
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Patent Agency Ranking
公开(公告)号：US20230155199A1
公开(公告)日：2023-05-18
申请号：US18093833
申请日：2023-01-06
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Kazutaka KURIKI , Ryota TAJIMA , Kouhei TOYOTAKA , Hideaki SHISHIDO , Toshiyuki ISA
CPC classification number: H01M10/482 , G06N3/04 , H01M10/441 , H01M10/486 , H02J7/0013 , H02J7/0047 , H02J7/007 , G06N3/065
Abstract: A power storage system with excellent characteristics is provided. A power storage system with a high degree of safety is provided. A power storage system with less deterioration is provided. A storage battery with excellent characteristics is provided. The power storage system includes a neural network and a storage battery. The neural network includes an input layer, an output layer, and one or more hidden layers between the input layer and the output layer. The predetermined hidden layer is connected to the previous hidden layer or the previous input layer by a predetermined weight coefficient, and connected to the next hidden layer or the next output layer by a predetermined weight coefficient. In the storage battery, voltage and time at which the voltage is obtained are measured as one of sets of data. The sets of data measured at different times are input to the input layer and the operational condition of the storage battery is changed in accordance with a signal output from the output layer.
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公开(公告)号：US20230044210A1
公开(公告)日：2023-02-09
申请号：US17788483
申请日：2020-12-16
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Shunpei YAMAZAKI , Mayumi MIKAMI , Kazutaka KURIKI , Yumiko YONEDA , Teruaki OCHIAI , Yuji IWAKI
Abstract: A secondary battery with favorable cycle performance is provided. Alternatively, a secondary battery with higher capacity is provided. A positive electrode active material layer including a first graphene layer, a second graphene layer, and a positive electrode active material. The first graphene layer includes a first region covering the positive electrode active material. The second graphene layer includes a second region covering the positive electrode active material and a third region overlapping with the first region. The first region includes a plane positioned between the positive electrode active material and the third region and formed of arranged six-membered carbon rings. The positive electrode active material includes a fourth region with a layered rock-salt structure. A lithium layer with a layered rock-salt structure included in the fourth region is substantially perpendicular to the plane formed of six-membered carbon rings and included in the second region.
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公开(公告)号：US20230009782A1
公开(公告)日：2023-01-12
申请号：US17782707
申请日：2020-11-27
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Kazutaka KURIKI , Teruaki OCHIAI , Yumiko YONEDA , Shunpei YAMAZAKI
IPC: H01M4/66 , H01M10/0525 , H01M4/62
Abstract: To provide a secondary battery in which a side reaction does not easily occur at an interface between a positive electrode active material and a solid electrolyte, an interface between the positive electrode active material and a positive electrode current collector, or the like even when charge and discharge are repeated. In one embodiment of the present invention, a buffer layer or a protective layer is provided on a current collector surface or between a current collector layer and an active material layer to prevent deterioration such as oxidation of the current collector. As the buffer layer or the protective layer, it is possible to use a titanium compound such as titanium oxide, titanium oxide in which nitrogen is substituted for part of oxygen, titanium nitride, titanium nitride in which oxygen is substituted for part of nitrogen, or titanium oxynitride (TiOxNy, where 0
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公开(公告)号：US20220231341A1
公开(公告)日：2022-07-21
申请号：US17616582
申请日：2020-05-26
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Kazutaka KURIKI , Yumiko YONEDA , Yohei MOMMA , Teruaki OCHIAI
IPC: H01M10/0568 , H01M50/124 , H01M50/119 , H01M50/121 , H01M4/525 , H01M10/0525 , H01M4/587 , H01M10/48
Abstract: A lithium-ion secondary battery having high capacity and excellent charge and discharge cycle performance is provided. A secondary battery having high capacity is provided. A secondary battery having excellent charge and discharge performance is provided. A secondary battery in which a decrease in capacity is suppressed even at high temperatures is provided. The secondary battery includes a positive electrode, a negative electrode, an electrolyte solution, and an exterior body. The positive electrode includes a positive electrode active material. The positive electrode active material contains lithium, cobalt, oxygen, magnesium, and fluorine. The number of magnesium atoms contained in the positive electrode active material is greater than or equal to 0.001 times and less than or equal to 0.1 times the number of cobalt atoms contained in the positive electrode active material. The positive electrode active material includes a region having a layered rock-salt crystal structure. The electrolyte solution contains an ionic liquid. The exterior body includes a metal layer and a polymer layer stacked over the metal layer. The polymer layer includes a region in contact with the electrolyte solution.
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公开(公告)号：US20220231285A1
公开(公告)日：2022-07-21
申请号：US17617188
申请日：2020-06-01
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Kazutaka KURIKI , Ryota TAJIMA , Yumiko YONEDA
Abstract: A solid-state secondary battery with high charge and discharge characteristics is provided. The solid-state secondary battery includes a first layer and a positive electrode active material layer over a substrate. The first layer and the positive electrode active material layer are in contact with each other; the first layer has conductivity; the first layer has a first crystal structure including first cations and first anions; the positive electrode active material layer has a second structure including second cations and second anions; and a value calculated by the following formula (1) is less than or equal to 0.1 when La denotes the minimum value of a distance between one of the first cations and another one of the first cations in the first crystal structure and Lb denotes the minimum value of a distance between one of the second cations and another one of the second cations. La - Lb L a ( 1 )
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