公开(公告)号：US20210202945A1

公开(公告)日：2021-07-01

申请号：US17184074

申请日：2021-02-24

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yumiko Yoneda ,  Teppei Oguni ,  Takuya Miwa ,  Masaki Yamakaji ,  Ayae Tsuruta

IPC: H01M4/587 ,  H01M4/62 ,  C01B32/225 ,  C01B32/23 ,  H01M50/44 ,  H01M50/46 ,  H01M50/403 ,  H01M50/411 ,  H01M50/429 ,  H01M4/04 ,  H01M4/1393 ,  H01M4/36 ,  H01M10/0525 ,  H01M10/0587

Abstract: To provide a manufacturing method of graphene oxide that allows mass production through a relatively simple process, at low costs, and with safety and efficiency. A hydrogen peroxide solution, sulfuric acid, and flake graphite are put in a reaction container, and the mixture is stirred to obtain expansion graphite. The synthesized expansion graphite is washed not with pure water but with a saturated aqueous solution of magnesium sulfate (MgSO4) or an organic solvent, whereby a large amount of sulfuric acid is contained between graphite layers. The expansion graphite is subjected to heat treatment or microwave irradiation to form expanded graphite, and a graphite layer is peeled by ultrasonic treatment and then oxidized to form a graphene compound.

公开(公告)号：US10270097B2

公开(公告)日：2019-04-23

申请号：US14948965

申请日：2015-11-23

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya Miwa ,  Kuniharu Nomoto ,  Junpei Momo

IPC: H01M4/56 ,  H01M4/587 ,  H01M4/36 ,  H01M4/58 ,  C01D15/02 ,  C01G45/00 ,  C01G49/00 ,  C01G51/00 ,  C01G53/00 ,  C30B7/10 ,  C30B29/14 ,  H01M4/02

Abstract: An object is to reduce variation in shape of crystals that are to be formed. Solutions containing respective raw materials are made in an environment where an oxygen concentration is lower than that in air, the solutions containing the respective raw materials are mixed in an environment where an oxygen concentration is lower than that in air to form a mixture solution, and with use of the mixture solution, a composite oxide is formed by a hydrothermal method.

公开(公告)号：US10096428B2

公开(公告)日：2018-10-09

申请号：US15622995

申请日：2017-06-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya Miwa ,  Kuniharu Nomoto ,  Nobuhiro Inoue

IPC: H01G9/042 ,  H01M10/04 ,  H01M4/58 ,  H01M4/62 ,  B82Y30/00

Abstract: At least one of an aqueous solution A containing lithium, an aqueous solution B containing iron, manganese, cobalt, or nickel, and an aqueous solution C containing a phosphoric acid includes graphene oxide. The aqueous solution A is dripped into the aqueous solution C, so that a mixed solution E including a precipitate D is prepared. The mixed solution E is dripped into the aqueous solution B, so that a mixed solution G including a precipitate F is prepared. The mixed solution G is subjected to heat treatment in a pressurized atmosphere, so that a mixed solution H is prepared, and the mixed solution H is then filtered. Thus, particles of a compound containing lithium and oxygen which have a small size are obtained.

公开(公告)号：US10056578B2

公开(公告)日：2018-08-21

申请号：US15492015

申请日：2017-04-20

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Ryota Tajima ,  Minoru Takahashi ,  Junya Goto ,  Takuya Miwa

IPC: H01M2/00 ,  H01M2/02 ,  H01M10/0525 ,  H01M10/0585

CPC classification number: H01M2/0275 ,  H01M2/021 ,  H01M2/0277 ,  H01M2/18 ,  H01M2/26 ,  H01M4/13 ,  H01M10/0436 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/058 ,  H01M10/0585 ,  H01M2220/30

Abstract: 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 that is durable even when force is externally applied thereto is provided. A region that is easily partly bent and a region that is not easily partly bent owing to a protective material provided in the region are intentionally formed to obtain the durable secondary battery.

公开(公告)号：US20150333359A1

公开(公告)日：2015-11-19

申请号：US14709950

申请日：2015-05-12

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Minoru TAKAHASHI ,  Ryota Tajima ,  Takuya Miwa ,  Yuugo Goto

IPC: H01M10/04 ,  H01M10/42

Abstract: 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 that is durable even when force is externally applied thereto is provided. A cushioning material is provided in a region surrounded by an exterior body of a secondary battery. Specifically, a cushioning material is provided on the periphery of a current collector such that a sealing portion of an exterior body (film) is located outside the cushioning material.

Abstract translation: 在将具有比金属罐低的强度的膜用作二次电池的外部主体的情况下，设置在由外部主体包围的区域中的集电体，设置在外部主体的表面上的活性物质层 集电器等可能会在外部施加到二次电池上时损坏。 提供即使在外部施加力时也耐用的二次电池。 缓冲材料设置在由二次电池的外部主体围绕的区域中。 具体而言，在集电体的周围设置有缓冲材料，使得外部体（膜）的密封部位于缓冲材料的外侧。

公开(公告)号：US20150147626A1

公开(公告)日：2015-05-28

申请号：US14555644

申请日：2014-11-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Ryota TAJIMA ,  Yuugo Goto ,  Yumiko Yoneda ,  Junya Goto ,  Takuya Miwa

IPC: H01M2/16 ,  H05K5/00

CPC classification number: H05K5/0086 ,  H01M2/0277 ,  H01M2/0285 ,  H01M2/0287 ,  H01M2/06 ,  H01M2/1613 ,  H01M2/162 ,  H01M2/1626 ,  H01M2/1653 ,  H01M2/18 ,  H01M2/266 ,  H01M4/58 ,  H01M10/0463 ,  H01M10/052 ,  H01M10/0585 ,  H01M2220/20 ,  H01M2220/30 ,  Y02E60/122 ,  Y02E60/13

Abstract: To provide a power storage unit having a structure which is unlikely to break down by change in shape, such as bending. An electrode plate is covered with a sheet of an insulator which is folded in two. The sheet is preferably processed into a bag-like shape or an envelope-like shape by bonding overlapping portions of the sheet in the periphery of the electrode plate. The electrode plate and the sheet are fixed to an exterior body. In the case where the shape of the exterior body is changed by bending or the like, the electrode plate and the sheet can slide together in the exterior body. Thus, stress on the electrode plate due to bending can be relieved.

Abstract translation: 提供一种具有不易因形状变化（例如弯曲）而分解的结构的蓄电单元。 电极板被折叠成两个的绝缘体片覆盖。 优选通过在电极板的周边粘合片材的重叠部分来将片材加工成袋状或包封状。 电极板和片材固定在外部主体上。 在通过弯曲等改变外部主体的形状的情况下，电极板和片材可以在外部主体中一起滑动。 因此，可以减轻由于弯曲引起的电极板上的应力。