-
公开(公告)号：US20240283023A1
公开(公告)日：2024-08-22
申请号：US18557127
申请日：2022-04-15
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Kazutaka KURIKI , Yumiko YONEDA , Yoshiharu ASADA , Tetsuya KAKEHATA
IPC: H01M10/0567 , H01G11/46 , H01G11/50 , H01G11/62 , H01M4/02 , H01M4/131 , H01M4/525 , H01M10/0525
CPC classification number: H01M10/0567 , H01G11/46 , H01G11/50 , H01G11/62 , H01M4/131 , H01M4/525 , H01M10/0525 , H01M2004/028 , H01M2300/0025
Abstract: A lithium-ion secondary battery with a high capacity and excellent charge and discharge cycle performance is provided. A secondary battery with a high capacity is provided. A secondary battery whose shape hardly changes in a vacuum is provided. A bendable secondary battery is provided. The secondary battery contains a positive electrode active material and an electrolyte; the positive electrode active material is lithium cobalt oxide to which magnesium is added; magnesium has a gradient in which a concentration increases from an inner portion toward a surface of the positive electrode active material; the electrolyte contains an imidazolium salt; and a temperature range where the secondary battery can operate is higher than or equal to −20° C. and lower than or equal to 100° C.
-
Patent Agency Ranking
公开(公告)号：US20230216051A1
公开(公告)日：2023-07-06
申请号：US17996697
申请日：2021-04-23
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Kazutaka KURIKI , Yuji IWAKI , Kaori OGITA , Mayumi MIKAMI , Yoshiharu ASADA , Tatsuyoshi TAKAHASHI , Shunpei YAMAZAKI , Kazuki TANEMURA
CPC classification number: H01M4/583 , H01M4/0471 , H01M2004/027
Abstract: A negative electrode active material particle with little deterioration is provided. Alternatively, a novel negative electrode active material particle is provided. Alternatively, a power storage device with little deterioration is provided. Alternatively, a highly safe power storage device is provided. Alternatively, a novel power storage device is provided. The electrode includes an active material and a conductive additive; the active material contains a metal or a compound including one or more elements selected from silicon, tin, gallium, aluminum, germanium, lead, antimony, bismuth, silver, zinc, cadmium, and indium; the conductive additive contains a graphene compound; and the graphene compound contains fluorine.
-
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.
-
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.
-
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.
-
公开(公告)号：US20230052866A1
公开(公告)日：2023-02-16
申请号：US17788844
申请日：2020-12-15
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Mayumi MIKAMI , Jo SAITO , Teruaki OCHIAI , Yohei MOMMA , Yoshimi NAKASHIMA , Yoshiharu ASADA , Kazuki TANEMURA
IPC: H01M4/525 , H01M10/0525 , H01M4/36
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 positive electrode active material including lithium, cobalt, nickel, magnesium, and oxygen, in which the a-axis lattice constant of an outermost surface layer of the positive electrode active material is larger than the a-axis lattice constant of an inner portion and in which the c-axis lattice constant of the outermost surface layer is larger than the c-axis lattice constant of the inner portion. A rate of change between the a-axis lattice constant of the outermost surface layer and the a-axis lattice constant of the inner portion is preferably larger than 0 and less than or equal to 0.12, and a rate of change between the c-axis lattice constant of the outermost surface layer and the c-axis lattice constant of the inner portion is preferably larger than 0 and less than or equal to 0.18.
-
-
-
-
-
Search Results
6
records
(took 0.02 seconds)
