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公开(公告)号：US12142759B2
公开(公告)日：2024-11-12
申请号：US17291463
申请日：2019-11-07
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Mayumi Mikami , Yohei Momma , Teruaki Ochiai
IPC: H01M4/525 , H01M4/02 , H01M4/505 , H01M10/0525
Abstract: A positive electrode active material with high capacity and excellent charging and discharging cycle performance for a lithium-ion secondary battery is provided. The positive electrode active material contains lithium, cobalt, and oxygen, and the spin density attributed to a bivalent cobalt ion and a tetravalent cobalt ion is within a predetermined range. It is preferable that the positive electrode active material further contain magnesium. An appropriate magnesium concentration is represented as a concentration with respect to cobalt. It is also preferable that the positive electrode active material further contain fluorine.
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公开(公告)号：US12087938B2
公开(公告)日：2024-09-10
申请号：US15374048
申请日：2016-12-09
Applicant: Semiconductor Energy Laboratory Co., LTD.
Inventor： Hiroyuki Miyake , Nobuhiro Inoue , Ryo Yamauchi , Mako Motoyoshi , Takahiro Kawakami , Mayumi Mikami , Miku Fujita , Shunpei Yamazaki
IPC: H01M4/36 , H01G11/06 , H01G11/28 , H01G11/30 , H01G11/36 , H01G11/50 , H01M4/134 , H01M4/38 , H01M4/62 , H01M10/0525
CPC classification number: H01M4/366 , H01G11/06 , H01G11/28 , H01G11/30 , H01G11/36 , H01G11/50 , H01M4/134 , H01M4/386 , H01M4/626 , H01M10/0525
Abstract: 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 a power storage device includes a number of composites in particulate forms. The composites include a negative electrode active material, a first functional material, and a compound. The compound includes a constituent element of the negative electrode active material and a constituent element of the first functional material. The negative electrode active material includes a region in contact with at least one of the first functional material or the compound.
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公开(公告)号：US12040653B2
公开(公告)日：2024-07-16
申请号：US17283689
申请日：2019-10-15
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Munehiro Kozuma , Takayuki Ikeda , Takanori Matsuzaki , Kei Takahashi , Mayumi Mikami , Shunpei Yamazaki
IPC: H02J7/00 , G11C11/401 , H01L27/06 , H01M10/0525 , H01M10/42 , H01M10/48 , H01M10/613 , H01M10/615 , H01M10/625 , H01M10/633
CPC classification number: H02J7/007194 , G11C11/401 , H01M10/0525 , H01M10/425 , H01M10/4257 , H01M10/48 , H01M10/486 , H01M10/613 , H01M10/615 , H01M10/625 , H01M10/633 , H02J7/0029 , H02J7/0047 , H01L27/0629 , H01M2010/4271 , H01M2220/20
Abstract: The safety is ensured in such a manner that with an abnormality detection system of a secondary battery, abnormality of a secondary battery is detected, for example, a phenomenon that lowers the safety of the secondary battery is detected early, and a user is warned or the use of the secondary battery is stopped. The abnormality detection system of the secondary battery determines whether the temperature of the secondary battery is within a temperature range in which normal operation can be performed on the basis of temperature data obtained with a temperature sensor. In the case where the temperature of the secondary battery is high, a cooling device is driven by a control signal from the abnormality detection system of the secondary battery. The abnormality detection system of the secondary battery includes at least a memory means. The memory means has a function of holding an analog signal and includes a transistor using an oxide semiconductor for a semiconductor layer.
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Patent Agency Ranking
公开(公告)号：US11870042B2
公开(公告)日：2024-01-09
申请号：US16641336
申请日：2018-08-28
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Mayumi Mikami , Ryota Tajima , Hideaki Shishido , Kensuke Yoshizumi
CPC classification number: H01M10/4257 , B60L50/60 , G06N3/04 , H01M10/48 , H01M10/486 , H01L27/1207 , H01L27/1225 , H01L27/1255 , H01L29/24 , H01L29/7869 , H01L29/78648 , H01M2010/4271 , H01M2220/20 , H10B99/00
Abstract: A sensor element with excellent characteristics is provided. An electronic device including a power storage system with excellent characteristics is provided. A vehicle including a power storage system with excellent characteristics is provided. A novel semiconductor device is provided. The power storage system includes a storage battery, a neural network, and a sensor element; the neural network includes an input layer, an output layer, and one or a plurality of middle layers provided between the input layer and the output layer; a value corresponding to a first signal output from the sensor element is supplied to the input layer; the first signal is an analog signal; the sensor element includes a region in contact with a surface of the storage battery; and the sensor element has a function of measuring one or both of strain and temperature.
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公开(公告)号：US20220190313A1
公开(公告)日：2022-06-16
申请号：US17687800
申请日：2022-03-07
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Teruaki Ochiai , Takahiro Kawakami , Mayumi Mikami , Yohei Momma , Masahiro Takahashi , Ayae Tsuruta
IPC: H01M4/131 , H01M4/134 , H01M4/36 , H01M4/13915 , H01M4/525 , H01M4/1315 , H01M4/86 , H01M4/1391 , H01M4/62
Abstract: A positive electrode active material which can improve cycle characteristics of a secondary battery is provided. Two kinds of regions are provided in a superficial portion of a positive electrode active material such as lithium cobaltate which has a layered rock-salt crystal structure. The inner region is a non-stoichiometric compound containing a transition metal such as titanium, and the outer region is a compound of representative elements such as magnesium oxide. The two kinds of regions each have a rock-salt crystal structure. The inner layered rock-salt crystal structure and the two kinds of regions in the superficial portion are topotaxy; thus, a change of the crystal structure of the positive electrode active material generated by charging and discharging can be effectively suppressed. In addition, since the outer coating layer in contact with an electrolyte solution is the compound of representative elements which is chemically stable, the secondary battery having excellent cycle characteristics can be obtained.
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公开(公告)号：US11094927B2
公开(公告)日：2021-08-17
申请号：US15726520
申请日：2017-10-06
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Takahiro Kawakami , Teruaki Ochiai , Yohei Momma , Ayae Tsuruta , Masahiro Takahashi , Mayumi Mikami
IPC: H01M4/36 , H01M4/04 , H01M4/62 , H01G11/24 , H01G11/86 , H01G11/50 , H01G11/60 , H01M4/505 , H01M4/525 , H01M10/0525 , H01M4/02
Abstract: Provided is a positive electrode active material which suppresses a reduction in capacity due to charge and discharge cycles when used in a lithium ion secondary battery. A covering layer is formed by segregation on a superficial portion of the positive electrode active material. The positive electrode active material includes a first region and a second region. The first region exists in an inner portion of the positive electrode active material. The second region exists in a superficial portion of the positive electrode active material and part of the inner portion thereof. The first region includes lithium, a transition metal, and oxygen. The second region includes magnesium, fluorine, and oxygen.
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公开(公告)号：US10741828B2
公开(公告)日：2020-08-11
申请号：US15638449
申请日：2017-06-30
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Teruaki Ochiai , Takahiro Kawakami , Mayumi Mikami , Yohei Momma , Masahiro Takahashi , Ayae Tsuruta
IPC: H01M4/131 , H01M4/1315 , H01M4/1391 , H01M4/62 , H01M4/13915 , H01M4/86 , H01M4/02 , H01M10/0525
Abstract: A positive electrode active material which can improve cycle characteristics of a secondary battery is provided. Two kinds of regions are provided in a superficial portion of a positive electrode active material such as lithium cobaltate which has a layered rock-salt crystal structure. The inner region is a non-stoichiometric compound containing a transition metal such as titanium, and the outer region is a compound of representative elements such as magnesium oxide. The two kinds of regions each have a rock-salt crystal structure. The inner layered rock-salt crystal structure and the two kinds of regions in the superficial portion are topotaxy; thus, a change of the crystal structure of the positive electrode active material generated by charging and discharging can be effectively suppressed. In addition, since the outer coating layer in contact with an electrolyte solution is the compound of representative elements which is chemically stable, the secondary battery having excellent cycle characteristics can be obtained.
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公开(公告)号：US20180076489A1
公开(公告)日：2018-03-15
申请号：US15698695
申请日：2017-09-08
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Mayumi Mikami , Yohei Momma , Minoru Takahashi , Hiroshi Kadoma , Teppei Oguni , Satoshi Seo
IPC: H01M10/42 , H01M10/0525 , H01M4/505 , H01M4/525 , H01M4/36 , H01G11/36 , H01G11/42 , H01G11/46 , H01G11/26 , C07F7/18
CPC classification number: H01M10/4235 , C07F7/12 , C07F7/1804 , H01G11/06 , H01G11/26 , H01G11/30 , H01G11/36 , H01G11/38 , H01G11/42 , H01G11/46 , H01G11/50 , H01G11/52 , H01G11/58 , H01M4/131 , H01M4/366 , H01M4/505 , H01M4/525 , H01M4/625 , H01M10/052 , H01M10/0525 , H01M2220/20 , Y02E60/122
Abstract: A novel electrode, a novel power storage device, an electrode with less deterioration, an electrode with a high capacity, a long-life power storage device, a power storage device with less deterioration, a power storage device with high energy density, or a highly reliable power storage device is provided. The electrode includes a graphene compound including a graphene layer and a substituted or unsubstituted chain group, and an active material. The graphene layer is bonded to the chain group through a substituent containing silicon. The graphene compound includes a region in contact with the active material in particle form. The active material includes an element A, which is one or more elements selected from elements belonging to Group 1 and elements belonging to Group 2, and an element M, which is one or more elements selected from manganese and nickel. The chain group includes one or more groups selected from a carbonyl group, an ester group, a carboxyl group, an ether group, and an epoxy group.
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