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公开(公告)号：US11664488B2
公开(公告)日：2023-05-30
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 , H01M4/1315 , H01M4/1391 , H01M4/62 , H01M4/13915 , H01M4/134 , H01M4/36 , H01M4/525 , H01M4/86 , H01M4/02 , H01M10/0525
CPC classification number: H01M4/131 , H01M4/134 , H01M4/1315 , H01M4/1391 , H01M4/13915 , H01M4/366 , H01M4/525 , H01M4/625 , H01M4/8657 , H01M10/0525 , H01M2004/021 , H01M2004/028
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：US10593929B2
公开(公告)日：2020-03-17
申请号：US14789174
申请日：2015-07-01
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Yohei Momma , Junpei Momo , Minoru Takahashi , Takahiro Kawakami
IPC: H01M4/04 , H01M4/13 , H01M10/05 , H01M4/139 , H01M10/058
Abstract: To provide a fabricating method and a fabricating apparatus for a lithium-ion secondary battery having stable charge characteristics and lifetime characteristics. A positive electrode is subjected to an electrochemical reaction in a large amount of electrolytic solution in advance before a secondary battery is completed. In this manner, the positive electrode can have stability. The use of the positive electrode enables fabrication of a highly reliable secondary battery. Similarly, a negative electrode is subjected to an electrochemical reaction in a large amount of electrolytic solution in advance. The use of the negative electrode enables fabrication of a highly reliable secondary battery.
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13.发明授权公开(公告)号：US10367188B2
公开(公告)日：2019-07-30
申请号：US15538049
申请日：2015-12-25
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Takahiro Kawakami , Yohei Momma , Teruaki Ochiai , Tatsuya Ikenuma
Abstract: In manufacturing a storage battery electrode, a method for manufacturing a storage battery electrode with high capacity and stability is provided.As a method for preventing a mixture for forming an active material layer from becoming strongly basic, a first aqueous solution is formed by mixing an active material exhibiting basicity with an aqueous solution exhibiting acidity and including an oxidized derivative of a first conductive additive; a first mixture is formed by reducing the oxidized derivative of the first conductive additive by drying the first aqueous solution; a second mixture is formed by mixing a second conductive additive and a binder; a third mixture is formed by mixing the first mixture and the second mixture; and a current collector is coated with the third mixture. The strong basicity of the mixture for forming an active material layer is lowered; thus, the binder can be prevented from becoming gelled.
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公开(公告)号：US10043989B2
公开(公告)日：2018-08-07
申请号：US15583058
申请日：2017-05-01
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Yohei Momma , Tomohiko Suganoya , Saki Obana
Abstract: A light-emitting device having a curved light-emitting surface is provided. Further, a highly-reliable light-emitting device is provided. A substrate with plasticity is used. A light-emitting element is formed over the substrate in a flat state. The substrate provided with the light-emitting element is curved and put on a surface of a support having a curved surface. Then, a protective layer for protecting the light-emitting element is formed in the same state. Thus, a light-emitting device having a curved light-emitting surface, such as a lighting device or a display device can be manufactured.
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公开(公告)号：US09882211B2
公开(公告)日：2018-01-30
申请号：US14704508
申请日：2015-05-05
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Takahiro Kawakami , Tatsuya Ikenuma , Teruaki Ochiai , Shuhei Yoshitomi , Mako Motoyoshi , Hiroyuki Miyake , Yohei Momma , Takuya Hirohashi , Satoshi Seo
IPC: H01M4/36 , H01M4/485 , H01M4/48 , H01M4/62 , H01M4/583 , G06F1/16 , H01M4/505 , G04G21/00 , H01M4/525 , H01M10/052
CPC classification number: H01M4/485 , G04C10/00 , G04G21/00 , G06F1/16 , G06F1/1626 , G06F1/163 , G06F1/1635 , G06F1/1652 , H01M4/366 , H01M4/483 , H01M4/505 , H01M4/525 , H01M4/583 , H01M4/623 , H01M4/625 , H01M10/052 , H01M2220/30
Abstract: A lithium-ion secondary battery with high capacity is provided. Alternatively, a lithium-ion secondary battery with improved cycle characteristics is provided. To achieve this, an active material including a particle having a cleavage plane and a layer containing carbon covering at least part of the cleavage plane is provided. The particle having the cleavage plane contains lithium, manganese, nickel, and oxygen. The layer containing carbon preferably contains graphene. When a lithium-ion secondary battery is fabricated using an electrode including the particle having the cleavage plane at least part of which is covered with the layer containing carbon as an active material, the discharge capacity can be increased and the cycle characteristics can be improved.
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Patent Agency Ranking
16.发明授权公开(公告)号：US09293236B2
公开(公告)日：2016-03-22
申请号：US14318727
申请日：2014-06-30
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Takahiro Kawakami , Shuhei Yoshitomi , Teruaki Ochiai , Yumiko Saito , Yohei Momma , Satoshi Seo , Mayumi Mikami , Shunsuke Adachi
CPC classification number: H01M4/505 , H01B1/08 , H01M4/362 , H01M4/525 , H01M10/052 , H01M10/0525 , H01M2004/028 , H01M2220/20 , H01M2220/30 , Y02E60/122
Abstract: The amount of lithium ions that can be received and released in and from a positive electrode active material is increased, and high capacity and high energy density of a secondary battery are achieved. Provided is a lithium-manganese composite oxide represented by LixMnyMzOw, where M is a metal element other than Li and Mn, or Si or P, and y, z, and w satisfy 0≦x/(y+z) 0, z>0, 0.26≦(y+z)/w
Abstract translation: 能够在正极活性物质中吸收和释放的锂离子的量增加，二次电池的高容量和高能量密度得以实现。 提供了由LixMnyMzOw表示的锂锰复合氧化物，其中M是除Li和Mn以外的金属元素，或Si或P，y，z和w满足0＆lt; nlE; x /（y + z）<2，y > 0，z> 0,0.26和nlE;（y + z）/ w <0.5和0.2
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公开(公告)号：US11988720B2
公开(公告)日：2024-05-21
申请号：US17312475
申请日：2019-12-13
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Kei Takahashi , Takayuki Ikeda , Ryota Tajima , Mayumi Mikami , Yohei Momma , Munehiro Kozuma , Takanori Matsuzaki
IPC: G01R31/392 , H01M10/44 , H01M10/48 , H02J7/00 , H01L29/786
CPC classification number: G01R31/392 , H01M10/44 , H01M10/48 , H02J7/005 , H01L29/7869 , H01M2220/20
Abstract: A semiconductor device that detects deterioration of a secondary battery is provided. The semiconductor device includes a power gauge, an anomalous current detection circuit, and a control circuit. The power gauge includes a current divider circuit and an integrator circuit. The anomalous current detection circuit includes a first memory, a second memory, and a first comparator. The integrator circuit can convert a detection current detected at the current divider circuit into a detection voltage by integrating the detection current. The anomalous current detection circuit is supplied with the detection voltage, a first signal at a first time, and a second signal at a second time. The first signal can make the detection voltage at the first time be stored in the first memory and the second signal can make the detection voltage at the second time be stored in the second memory. The first comparator outputs a change from the detection voltage at the first time to the detection voltage at the second time as a first output signal to the control circuit.
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公开(公告)号：US11777089B2
公开(公告)日：2023-10-03
申请号：US17729170
申请日：2022-04-26
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Mayumi Mikami , Aya Uchida , Yumiko Yoneda , Yohei Momma , Masahiro Takahashi , Teruaki Ochiai
IPC: H01B1/08 , H01M4/505 , C01G53/00 , H01M4/525 , H01M4/131 , H01M4/133 , H01M4/134 , H01M4/139 , H01M4/36 , H01M10/0525 , H01M6/16 , H01M4/02
CPC classification number: H01M4/525 , C01G53/50 , H01B1/08 , H01M4/131 , H01M4/133 , H01M4/134 , H01M4/139 , H01M4/366 , H01M4/505 , H01M6/164 , H01M10/0525 , C01P2002/74 , H01M2004/028
Abstract: A positive electrode active material having high capacity and excellent cycle performance is provided. The positive electrode active material has a small difference in a crystal structure between the charged state and the discharged state. For example, the crystal structure and volume of the positive electrode active material, which has a layered rock-salt crystal structure in the discharged state and a pseudo-spinel crystal structure in the charged state at a high voltage of approximately 4.6 V, are less likely to be changed by charge and discharge as compared with those of a known positive electrode active material.
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19.发明授权公开(公告)号：US11545655B2
公开(公告)日：2023-01-03
申请号：US17171042
申请日：2021-02-09
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Takahiro Kawakami , Yohei Momma , Teruaki Ochiai , Tatsuya Ikenuma
Abstract: In manufacturing a storage battery electrode, a method for manufacturing a storage battery electrode with high capacity and stability is provided.
As a method for preventing a mixture for forming an active material layer from becoming strongly basic, a first aqueous solution is formed by mixing an active material exhibiting basicity with an aqueous solution exhibiting acidity and including an oxidized derivative of a first conductive additive; a first mixture is formed by reducing the oxidized derivative of the first conductive additive by drying the first aqueous solution; a second mixture is formed by mixing a second conductive additive and a binder; a third mixture is formed by mixing the first mixture and the second mixture; and a current collector is coated with the third mixture. The strong basicity of the mixture for forming an active material layer is lowered; thus, the binder can be prevented from becoming gelled.-
20.发明授权公开(公告)号：US10923706B2
公开(公告)日：2021-02-16
申请号：US16521650
申请日：2019-07-25
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Takahiro Kawakami , Yohei Momma , Teruaki Ochiai , Tatsuya Ikenuma
Abstract: In manufacturing a storage battery electrode, a method for manufacturing a storage battery electrode with high capacity and stability is provided.
As a method for preventing a mixture for forming an active material layer from becoming strongly basic, a first aqueous solution is formed by mixing an active material exhibiting basicity with an aqueous solution exhibiting acidity and including an oxidized derivative of a first conductive additive; a first mixture is formed by reducing the oxidized derivative of the first conductive additive by drying the first aqueous solution; a second mixture is formed by mixing a second conductive additive and a binder; a third mixture is formed by mixing the first mixture and the second mixture; and a current collector is coated with the third mixture. The strong basicity of the mixture for forming an active material layer is lowered; thus, the binder can be prevented from becoming gelled.
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