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公开(公告)号：US20240283023A1
公开(公告)日：2024-08-22
申请号：US18557127
申请日：2022-04-15
IPC分类号： H01M10/0567 , H01G11/46 , H01G11/50 , H01G11/62 , H01M4/02 , H01M4/131 , H01M4/525 , H01M10/0525
CPC分类号： H01M10/0567 , H01G11/46 , H01G11/50 , H01G11/62 , H01M4/131 , H01M4/525 , H01M10/0525 , H01M2004/028 , H01M2300/0025
摘要： 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.
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公开(公告)号：US20230246224A1
公开(公告)日：2023-08-03
申请号：US18132504
申请日：2023-04-10
发明人： Minoru TAKAHASHI , Yuugo GOTO , Yumiko YONEDA , Takuya MIWA , Ryota TAJIMA
IPC分类号： H01M10/04 , H01M50/176 , H01M50/121 , H01M50/119 , H01M50/116 , H01M50/543
CPC分类号： H01M10/0436 , H01M50/176 , H01M50/121 , H01M50/119 , H01M50/116 , H01M50/543 , H01M50/124
摘要： In the case where a film, which has lower strength than a metal can, is used as an exterior body of a secondary battery, a current collector provided in a region surrounded by the exterior body, an active material layer provided on a surface of the current collector, or the like might be damaged when force is externally applied to the secondary battery. A secondary battery which is resistant to external force in obtained. An opening is provided in a central portion of the secondary battery, and a terminal is formed in the opening. An outer edge of the secondary battery is fixed by thermocompression bonding. In addition, the central portion of the secondary battery is fixed by thermocompression bonding, so that the amount of bending is limited even when the outer edge portion of the secondary battery is bent.
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3.发明公开公开(公告)号：US20230246198A1
公开(公告)日：2023-08-03
申请号：US17766336
申请日：2020-09-29
发明人： Kaori OGITA , Hiroshi KADOMA , Tomoya HIROSE , Yumiko YONEDA , Yuji IWAKI , Tatsuyoshi TAKAHASHI , Shunpei YAMAZAKI , Mayumi MIKAMI , Kazuki TANEMURA
IPC分类号： H01M4/62 , H01M4/525 , H01M4/131 , H01M10/0525
CPC分类号： H01M4/628 , H01M4/525 , H01M4/131 , H01M10/0525 , H01M2004/028
摘要： A positive electrode for a secondary battery having excellent cycle performance is provided. The positive electrode for a secondary battery includes a positive electrode current collector layer, a base film, a positive electrode active material layer, and a cap layer; the base film contains titanium nitride; the positive electrode active material layer contains lithium cobalt oxide; and the cap layer contains titanium oxide. The use of titanium nitride for the base film can inhibit oxidation of the positive electrode current collector and diffusion of metal atoms while ensuring an adequate conductivity. The use of titanium oxide for the cap layer can inhibit a side reaction between the positive electrode active material layer and an electrolyte and collapse of a crystal structure of the electrode active material, improving the cycle performance.
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公开(公告)号：US20230074610A1
公开(公告)日：2023-03-09
申请号：US17904395
申请日：2021-03-02
IPC分类号： H01M4/62 , H01M4/04 , H01M10/0525 , H01M4/38 , B60L50/64
摘要： An active material layer that has a high filling rate and a higher density and is formed using a small amount of conductive additive is provided. A positive electrode active material layer includes a first carbon material and a second carbon material, which is more likely to aggregate than the first carbon material, and mixing is performed such that the weight of the second carbon material is more than or equal to 1.5 times and less than or equal to 20 times that of the first carbon material, thereby preventing the aggregation of the second carbon material and the aggregation of the first carbon material and reducing the proportion of the aggregated portions.
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公开(公告)号：US20220416239A1
公开(公告)日：2022-12-29
申请号：US17780049
申请日：2020-11-26
发明人： Kazutaka KURIKI , Yumiko YONEDA , Mayumi MIKAMI , Hiroshi KADOMA , Kunihiko SUZUKI , Shunpei YAMAZAKI
IPC分类号： H01M4/525 , H01M10/0525 , H01M4/505 , H01M4/583 , H01M10/0567
摘要： A secondary battery that can withstand at least high temperature is achieved by designing the structure of the secondary battery. The secondary battery uses: a positive electrode active material obtained by a formation method including a first step of forming a first mixture by pulverizing magnesium fluoride, lithium fluoride, a nickel source, and an aluminum source and then mixing the pulverized materials with powder of lithium cobalt oxide, and a second step of forming a second mixture by heating the first mixture at a temperature lower than an upper temperature limit of the lithium cobalt oxide; and an electrolyte solution to which LiBOB is added.
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公开(公告)号：US20220216524A1
公开(公告)日：2022-07-07
申请号：US17606839
申请日：2020-04-17
发明人： Shunpei YAMAZAKI , Kazutaka KURIKI , Yumiko YONEDA , Ryota TAJIMA
IPC分类号： H01M10/0585 , H01M10/0525 , H01M10/0562 , H01M4/48 , H01M4/13
摘要： A solid-state secondary battery with high safety is provided. The solid-state secondary battery includes a first film that has a function of releasing and accumulating a lithium ion and is over a negative electrode current collector layer, a second film that has a function of transporting a lithium ion and is over the first film, a third film that has a function of releasing and accumulating a lithium ion and is over the second film, and a positive electrode current collector layer over the third film. The total thickness of the first to third films is the same before and after charging.
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公开(公告)号：US20210408593A1
公开(公告)日：2021-12-30
申请号：US17468766
申请日：2021-09-08
发明人： Yumiko YONEDA , Masaki YAMAKAJI , Ryota TAJIMA , Masaaki HIROKI
IPC分类号： H01M10/0565 , H01M4/02 , H01M4/13 , H01M10/04 , H01M10/052 , H01M10/0585
摘要： A gel electrolyte and a separator are provided between the positive electrode current collector and the negative electrode current collector. The plurality of positive electrode current collectors and the plurality of negative electrode current collectors are stacked such that surfaces of negative electrodes with which active material layers are not coated or surfaces of positive electrodes with which active material layers are not coated are in contact with each other.
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8.发明申请NEGATIVE ELECTRODE FOR POWER STORAGE DEVICE, POWER STORAGE DEVICE, AND ELECTRICAL DEVICE 审中-公开蓄电装置用蓄电池，蓄电装置及电气装置公开(公告)号：US20150132649A1
公开(公告)日：2015-05-14
申请号：US14534275
申请日：2014-11-06
发明人： Kiyofumi OGINO , Yumiko YONEDA , Rika YATABE , Nobuhiro INOUE
摘要： A power storage device having high capacitance is provided. A power storage device with excellent cycle characteristics is provided. A power storage device with high charge and discharge efficiency is provided. A power storage device including a negative electrode with low resistance is provided. A negative electrode for the power storage device includes a current collector and an active material layer including a plurality of active material particles over the current collector. The active material particle is silicon, and the size of the silicon particle is greater than or equal to 0.001 μm and less than or equal to 7 μm.
摘要翻译： 提供具有高电容的蓄电装置。 提供了具有优异循环特性的蓄电装置。 提供具有高充放电效率的蓄电装置。 提供了包括具有低电阻的负极的蓄电装置。 蓄电装置的负极包括集电体和在集电体上包含多个活性物质粒子的活性物质层。 活性物质颗粒是硅，硅颗粒的尺寸大于或等于0.001μm且小于或等于7μm。
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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
IPC分类号： H01M4/525 , H01M10/44 , H01M4/583 , H01M10/0569 , H01M4/133 , C07D233/58
CPC分类号： H01M4/525 , H01M10/44 , H01M4/583 , H01M10/0569 , H01M4/133 , C07D233/58 , H01M2004/028
摘要： 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：US20230317925A1
公开(公告)日：2023-10-05
申请号：US18017189
申请日：2021-07-30
发明人： Kazutaka KURIKI , Taisuke NAKAO , Yoshiharu ASADA , Yumiko YONEDA
CPC分类号： H01M4/366 , H01M4/0471 , H01M4/386 , H01M4/583 , H01M4/625 , H01M10/0525 , H01M2004/027
摘要： 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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