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公开(公告)号：US20190267607A1
公开(公告)日：2019-08-29
申请号：US16406645
申请日：2019-05-08
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Yohei MOMMA , Junpei MOMO , Minoru TAKAHASHI , Takahiro KAWAKAMI
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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72.发明申请公开(公告)号：US20180366726A1
公开(公告)日：2018-12-20
申请号：US16114312
申请日：2018-08-28
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Takahiro KAWAKAMI , Teruaki OCHIAI , Shuhei YOSHITOMI , Takuya HIROHASHI , Mako MOTOYOSHI , Yohei MOMMA , Junya GOTO
IPC: H01M4/505 , H01M4/131 , H01M4/1391 , H01M4/36
Abstract: To increase capacity per weight of a power storage device, a particle includes a first region, a second region in contact with at least part of a surface of the first region and located on the outside of the first region, and a third region in contact with at least part of a surface of the second region and located on the outside of the second region. The first and the second regions contain lithium and oxygen. At least one of the first region and the second region contains manganese. At least one of the first and the second regions contains an element M. The first region contains a first crystal having a layered rock-salt structure. The second region contains a second crystal having a layered rock-salt structure. An orientation of the first crystal is different from an orientation of the second crystal.
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公开(公告)号：US20160351838A1
公开(公告)日：2016-12-01
申请号：US15236710
申请日：2016-08-15
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Yohei MOMMA , Tomohiko SUGANOYA , Saki OBANA
CPC classification number: H01L51/0097 , H01L27/1225 , H01L27/32 , H01L27/3244 , H01L27/3258 , H01L33/52 , H01L51/5203 , H01L51/5237 , H01L51/524 , H01L51/5246 , H01L51/5253 , H01L51/56 , H01L2251/301 , H01L2251/5338 , H01L2924/0002 , Y02E10/549 , Y02P70/521 , H01L2924/00
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：US20150041804A1
公开(公告)日：2015-02-12
申请号：US14492607
申请日：2014-09-22
Applicant: Semiconductor Energy Laboratory Co., Ltd.
Inventor： Yohei MOMMA , Tomohiko SUGANOYA , Saki OBANA
CPC classification number: H01L51/0097 , H01L27/1225 , H01L27/32 , H01L27/3244 , H01L27/3258 , H01L33/52 , H01L51/5203 , H01L51/5237 , H01L51/524 , H01L51/5246 , H01L51/5253 , H01L51/56 , H01L2251/301 , H01L2251/5338 , H01L2924/0002 , Y02E10/549 , Y02P70/521 , H01L2924/00
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.
Abstract translation: 提供具有弯曲发光面的发光装置。 此外，提供了高度可靠的发光装置。 使用具有可塑性的基材。 在平坦状态下在基板上形成发光元件。 设置有发光元件的基板弯曲并放置在具有曲面的支撑体的表面上。 然后，在相同的状态下形成用于保护发光元件的保护层。 因此，可以制造具有弯曲发光面的发光装置，例如照明装置或显示装置。
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公开(公告)号：US20150014581A1
公开(公告)日：2015-01-15
申请号：US14328251
申请日：2014-07-10
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Takahiro KAWAKAMI , Shuhei YOSHITOMI , Teruaki OCHIAI , Yumiko SAITO , Yohei MOMMA , Satoshi SEO
Abstract: A positive electrode active material that achieves high capacity and high energy density of a secondary battery is provided. The positive electrode active material is represented by Li2Mn1-XAXO3 and contains a metal element, Si, or P as A. The positive electrode active material has higher discharge capacity than Li2MnO3.
Abstract translation: 提供了实现二次电池的高容量和高能量密度的正极活性物质。 正极活性物质由Li2Mn1-XAXO3表示，并含有金属元素Si或P为A.正极活性物质的放电容量高于Li2MnO3。
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Patent Agency Ranking
公开(公告)号：US20250140843A1
公开(公告)日：2025-05-01
申请号：US18927228
申请日：2024-10-25
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Mayumi MIKAMI , Jo SAITO , Teruaki OCHIAI , Masahiro TAKAHASHI , Tatsuyoshi TAKAHASHI , Yohei MOMMA , Kazutaka KURIKI , Kazune YOKOMIZO , Shunpei YAMAZAKI , Rihito WADA
IPC: H01M4/525 , H01M4/02 , H01M4/36 , H01M10/052 , H01M10/0568 , H01M10/0569
Abstract: To provide a positive electrode active material in which a phase transition is inhibited and a secondary battery including the positive electrode active material. An unprecedented synthesis method has been developed in which lithium cobalt oxide particles are treated with a molten salt of MgF2—LiF as a reaction accelerator to facilitate the diffusion and doping of magnesium into lithium cobalt oxide bulk and to form a stable coating layer in the particle surface portion. Ex situ XRD analysis confirms the inhibition of the harmful phase transition and the emergence of a novel phase as the modified LiCoO2 is charged up to 4.7 V. The modified LiCoO2 shows high electrochemical performance during high-voltage operation. This technology provides a guideline for suppressing fundamental degradation associated with phase transition and achieving ultra-high energy density LiCoO2 positive electrodes.
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公开(公告)号：US20240234718A1
公开(公告)日：2024-07-11
申请号：US18561360
申请日：2022-05-09
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Jo SAITO , Yohei MOMMA , Mayumi MIKAMI , Teruaki OCHIAI
IPC: H01M4/525 , C01G51/00 , H01M4/02 , H01M4/131 , H01M10/0525
CPC classification number: H01M4/525 , C01G51/42 , H01M4/131 , H01M10/0525 , C01P2002/72 , C01P2004/03 , C01P2004/04 , C01P2006/40 , H01M2004/028 , H01M2220/20
Abstract: A method for forming a positive electrode active material that is stable in a high potential state and/or a high temperature state is provided. The method for forming a positive electrode active material includes a step of mixing a composite oxide containing lithium and cobalt with a barium source, a magnesium source, and a fluorine source to fabricate a first mixture containing barium fluoride, magnesium fluoride, and lithium fluoride; a step of heating the first mixture at a temperature higher than or equal to 800° C. and lower than or equal to 1100° C. for longer than or equal to 2 hours; a step of mixing the first mixture with a nickel source and an aluminum source to fabricate a second mixture; and a step of heating the second mixture at a temperature higher than or equal to 800° C. and lower than or equal to 1100° C. for longer than or equal to 2 hours. When a molar ratio of magnesium fluoride to barium fluoride contained in the first mixture is MgF2:BaF2=y:1, y satisfies greater than or equal to 0.5 and less than or equal to 10.
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公开(公告)号：US20240079583A1
公开(公告)日：2024-03-07
申请号：US18262126
申请日：2022-01-13
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Kazuya SHIMADA , Kousuke SASAKI , Takashi HIRAHARA , Yusuke YOSHITANI , Mayumi MIKAMI , Yohei MOMMA
CPC classification number: H01M4/525 , C01G51/42 , C01P2002/60 , C01P2002/72 , C01P2004/03 , C01P2006/40 , H01M2004/028
Abstract: A novel method for forming a positive electrode active material is provided. The method for forming a positive electrode active material includes causing a reaction between a cobalt aqueous solution and an alkaline aqueous solution to form a cobalt compound; mixing the cobalt compound and a lithium compound and performing a first heat treatment to form a first composite oxide; mixing the first composite oxide and a compound containing a first additive element and performing a second heat treatment to form a second composite oxide; and mixing the second composite oxide and a compound containing a second additive element and performing a third heat treatment. The first heat treatment is performed at a temperature higher than or equal to 700° C. and lower than or equal to 1100° C. The second heat treatment is performed at a temperature higher than or equal to 700° C. and lower than or equal to 1000° C. The third heat treatment is performed at a temperature equal to the temperature of the second heat treatment or at a temperature lower than the temperature of the second heat treatment.
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79.发明公开公开(公告)号：US20230327095A1
公开(公告)日：2023-10-12
申请号：US18204451
申请日：2023-06-01
Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Inventor： Yohei MOMMA , Takahiro KAWAKAMI , Teruaki OCHIAI , Masahiro TAKAHASHI
IPC: H01M4/46 , H01M4/1391 , H01M4/62 , H01M4/36 , C01G51/00 , H01M4/525 , H01M4/131 , H01M10/0525
CPC classification number: H01M4/466 , H01M4/1391 , H01M4/62 , H01M4/366 , C01G51/42 , H01M4/525 , H01M4/625 , H01M4/131 , H01M10/0525 , C01P2002/85 , C01P2004/04 , C01P2006/40 , C01P2002/00 , G01N23/2273
Abstract: Provided is a positive electrode active material for a lithium ion secondary battery having favorable cycle characteristics and high capacity. A covering layer containing aluminum and a covering layer containing magnesium are provided on a superficial portion of the positive electrode active material. The covering layer containing magnesium exists in a region closer to a particle surface than the covering layer containing aluminum is. The covering layer containing aluminum can be formed by a sol-gel method using an aluminum alkoxide. The covering layer containing magnesium can be formed as follows: magnesium and fluorine are mixed as a starting material and then subjected to heating after the sol-gel step, so that magnesium is segregated.
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80.发明公开公开(公告)号：US20230327075A1
公开(公告)日：2023-10-12
申请号：US18204432
申请日：2023-06-01
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
CPC classification number: H01M4/131 , H01M4/1315 , H01M4/1391 , H01M4/625 , H01M2004/021 , H01M4/134 , H01M4/366 , H01M4/525 , H01M4/8657 , H01M4/13915
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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