公开(公告)号：US20200328402A1

公开(公告)日：2020-10-15

申请号：US16914607

申请日：2020-06-29

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

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.

公开(公告)号：US20200295349A1

公开(公告)日：2020-09-17

申请号：US16885350

申请日：2020-05-28

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

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.

公开(公告)号：US20200152961A1

公开(公告)日：2020-05-14

申请号：US16609621

申请日：2018-04-19

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yohei MOMMA ,  Mayumi MIKAMI ,  Aya UCHIDA ,  Kazuhito MACHIKAWA

IPC: H01M4/04 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/583 ,  H01M4/505 ,  H01M4/485

Abstract: To provide a positive electrode active material with which the cycle performance of a secondary battery can be improved and a manufacturing method thereof. When a secondary battery is fabricated using, for a positive electrode, a positive electrode active material obtained by depositing a solid electrolyte on a lithium compound with the use of a graphene compound by spray-drying treatment and volatilizing carbon from the graphene compound by heat treatment, the decomposition of an electrolyte solution in contact with the positive electrode active material can be inhibited, contributing to improvement in the cycle performance of the secondary battery.

公开(公告)号：US20180358566A1

公开(公告)日：2018-12-13

申请号：US16055612

申请日：2018-08-06

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yohei MOMMA ,  Tomohiko SUGANOYA ,  Saki OBANA

IPC: H01L51/00 ,  H01L51/52 ,  H01L27/12 ,  H01L27/32 ,  H01L33/52 ,  H01L51/56

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.

公开(公告)号：US20180145317A1

公开(公告)日：2018-05-24

申请号：US15800184

申请日：2017-11-01

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yohei MOMMA ,  Takahiro KAWAKAMI ,  Teruaki OCHIAI ,  Masahiro TAKAHASHI

IPC: H01M4/46 ,  H01M4/131 ,  H01M10/0525

CPC classification number: H01M4/466 ,  C01P2002/00 ,  G01N23/2273 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/62 ,  H01M10/0525 ,  H01M2004/028

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.

公开(公告)号：US20170317346A1

公开(公告)日：2017-11-02

申请号：US15649179

申请日：2017-07-13

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Tatsuya IKENUMA ,  Shuhei YOSHITOMI ,  Takahiro KAWAKAMI ,  Yumiko YONEDA ,  Yohei MOMMA

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/04 ,  H01M4/505 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/366 ,  H01M4/0402 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028 ,  Y02T10/7011

Abstract: To increase the volume density or weight density of lithium ions that can be received and released in and from a positive electrode active material to achieve high capacity and high energy density of a secondary battery. A lithium manganese composite oxide represented by LixMnyMzOw that includes a region belonging to a space group C2/c and is covered with a carbon-containing layer is used as the positive electrode active material. The element M is an element other than lithium and manganese. The lithium manganese composite oxide has high structural stability and high capacity.

公开(公告)号：US20160349905A1

公开(公告)日：2016-12-01

申请号：US15159036

申请日：2016-05-19

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yohei MOMMA ,  Takahiro KAWAKAMI ,  Junpei MOMO

IPC: G06F3/041 ,  G09G3/36 ,  G02F1/1333 ,  G06F3/044

CPC classification number: G09G3/3696 ,  G02F1/13338 ,  G02F1/13439 ,  G06F3/0412 ,  G06F3/044 ,  G06F2203/04102 ,  G06F2203/04103 ,  G06F2203/04111 ,  G06F2203/04112 ,  G09G3/3677 ,  G09G2300/0809 ,  G09G2300/0842

Abstract: A novel element, a novel formation method of a film, or a novel formation method of an element is provided. Alternatively, a film including graphene is formed at low cost and high yield. A formation method of a film including graphene includes a first step of forming a film including graphene oxide that includes a first region and a second region by application of a dispersion liquid in which graphene oxide is dispersed over a substrate and removal of dispersion medium from the applied dispersion liquid, a second step of forming a film including graphene by light irradiation to the first region to reduce the first region, and a third step of removing the second region by washing.

Abstract translation: 提供了一种新颖的元件，一种薄膜的新颖形成方法或一种新颖的元件形成方法。 或者，以低成本和高产率形成包括石墨烯的膜。 包括石墨烯的薄膜的形成方法包括：通过施加分散液体形成包括氧化石墨烯的薄膜的第一步骤，其中将石墨烯氧化物分散在基材上并从其中除去分散介质 第二步骤，通过光照射形成包括石墨烯的膜到第一区域以减少第一区域;以及第三步骤，通过洗涤除去第二区域。

公开(公告)号：US20160190545A1

公开(公告)日：2016-06-30

申请号：US14976504

申请日：2015-12-21

Applicant: Semiconductor Energy Laboratory Co., LTD.

Inventor： Junpei MOMO ,  Yohei MOMMA ,  Masaki YAMAKAJI ,  Teppei OGUNI

IPC: H01M4/04 ,  H01M10/058 ,  C25D3/42 ,  H01M10/04 ,  H01M4/38 ,  H01M10/052

CPC classification number: H01M4/0452 ,  C25D11/00 ,  C25D21/02 ,  C25D21/10 ,  H01M4/0445 ,  H01M4/0471 ,  H01M10/049 ,  H01M10/052 ,  H01M10/058 ,  H01M2220/30

Abstract: To provide a method of manufacturing 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 manufacture 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 manufacture of a highly reliable secondary battery.

Abstract translation: 提供具有稳定的电荷特性和寿命特性的锂离子二次电池的制造方法。 在二次电池完成之前，正电极预先在大量的电解液中进行电化学反应。 以这种方式，正极可以具有稳定性。 使用正极能够制造高可靠性的二次电池。 类似地，负极预先在大量的电解液中进行电化学反应。 使用负极能够制造高可靠性的二次电池。

公开(公告)号：US20160111710A1

公开(公告)日：2016-04-21

申请号：US14886298

申请日：2015-10-19

Applicant: Semiconductor Energy Laboratory Co., LTD.

Inventor： Junpei MOMO ,  Yohei MOMMA

IPC: H01M4/04 ,  C25D17/02

CPC classification number: H01M4/0438 ,  H01M10/0404 ,  H01M10/0409

Abstract: A fabricating method and a fabricating apparatus for a lithium-ion secondary battery having stable charge characteristics and lifetime characteristics are provided. A positive electrode is subjected to an electrochemical reaction in a large amount of electrolyte solution in advance before a secondary battery is completed. In this manner, the positive electrode can have stability. In a manner similar to that of the positive electrode, a negative electrode is also subjected to the electrochemical reaction in a large amount of the electrolyte solution in advance, whereby a high reliable secondary battery can be manufactured.

Abstract translation: 提供了具有稳定的电荷特性和寿命特性的锂离子二次电池的制造方法和制造装置。 在二次电池完成之前，正极在预先大量的电解液中进行电化学反应。 以这种方式，正极可以具有稳定性。 以与正极类似的方式，负极也预先在大量的电解液中进行电化学反应，从而可以制造出高可靠性的二次电池。

公开(公告)号：US20250015263A1

公开(公告)日：2025-01-09

申请号：US18763866

申请日：2024-07-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Atsushi KAWATSUKI ,  Naoto OKUZAWA ,  Mayumi MIKAMI ,  Yohei MOMMA

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/58 ,  H01M4/60

Abstract: One embodiment of the present invention is to provide a high-capacity lithium ion secondary battery and a production method thereof. To perform surface modification, a spherical resin is subjected to first heat treatment at a temperature higher than or equal to 500° C. in an inert atmosphere. By the heating, the contraction of a particle, the void formation due to a gas release from an inside of the particle, the crack on a particle surface, and the like are caused so as to form a support for sulfur that is to be mixed later. Obtained spherical particles and sulfur powder are mixed and then stored in a container. The mixture in the container is subjected to second heat treatment at a temperature higher than or equal to 120° C. without being exposed to outside air.