公开(公告)号：US20130283603A1

公开(公告)日：2013-10-31

申请号：US13923428

申请日：2013-06-21

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takuya MIWA ,  Kuniharu Nomoto ,  Nobuhiro Inoue

IPC: H01M4/58 ,  H01G9/042 ,  H01M10/04

CPC classification number: H01G9/042 ,  B82Y30/00 ,  H01M4/5825 ,  H01M4/622 ,  H01M4/625 ,  H01M10/04 ,  Y10T29/417 ,  Y10T29/49115

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.

Abstract translation: 含有锂的水溶液A，含有铁，锰，钴或镍的水溶液B和含有磷酸的水溶液C中的至少一种包括氧化石墨烯。 将水溶液A滴入水溶液C中，制备包含析出物D的混合溶液E。 将混合溶液E滴加到水溶液B中，从而制备包含沉淀物F的混合溶液G. 混合溶液G在加压气氛中进行热处理，制备混合溶液H，然后过滤混合溶液H. 因此，获得了具有小尺寸的含有锂和氧的化合物的颗粒。

公开(公告)号：US20210226216A1

公开(公告)日：2021-07-22

申请号：US17224229

申请日：2021-04-07

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya MIWA ,  Yumiko YONEDA ,  Teppei OGUNI

IPC: H01M4/58 ,  C01B25/45

Abstract: A composite oxide with high diffusion rate of lithium is provided. Alternatively, a lithium-containing complex phosphate with high diffusion rate of lithium is provided. Alternatively, a positive electrode active material with high diffusion rate of lithium is provided. Alternatively, a lithium ion battery with high output is provided. Alternatively, a lithium ion battery that can be manufactured at low cost is provided. A positive electrode active material is formed through a first step of mixing a lithium compound, a phosphorus compound, and water, a second step of adjusting pH by adding a first aqueous solution to a first mixed solution formed in the first step, a third step of mixing an iron compound with a second mixed solution formed in the second step, a fourth step of performing heat treatment under a pressure more than or equal to 0.1 MPa and less than or equal to 2 MPa at a highest temperature more than 100° C. and less than or equal to 119° C. on a third mixed solution formed in the third step with a pH of more than or equal to 3.5 and less than or equal to 5.0.

公开(公告)号：US20200295382A1

公开(公告)日：2020-09-17

申请号：US16892582

申请日：2020-06-04

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yumiko YONEDA ,  Takuya MIWA

IPC: H01M6/10 ,  H01M4/1397 ,  H01M4/36 ,  H01M2/26 ,  H01M4/58 ,  H01M10/04

Abstract: A positive electrode active material includes a plurality of groups of particles. The plurality of groups of particles has a particle diameter of more than or equal to 300 nm and less than or equal to 3 μm. Each of the groups includes two or more particles. The two or more particles are each a lithium-containing complex phosphate including one or more of iron, nickel, manganese, and cobalt. The group of particles includes a first particle and a second particle each having a major diameter and a minor diameter in the upper surface when seen from a predetermined direction. The major diameters of the first and second particles are substantially parallel to each other. The major diameter of the first particle is two to six times larger than the minor diameter of the first particle and the minor diameter of the first particle is more than or equal to 20 nm and less than or equal to 130 nm.

公开(公告)号：US20190319268A1

公开(公告)日：2019-10-17

申请号：US16454116

申请日：2019-06-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yumiko YONEDA ,  Teppei OGUNI ,  Takuya MIWA ,  Masaki YAMAKAJI ,  Ayae TSURUTA

IPC: H01M4/587 ,  C01B32/23 ,  C01B32/225 ,  H01M10/0587 ,  H01M10/0525 ,  H01M4/1393 ,  H01M2/16 ,  H01M4/62 ,  H01M4/04 ,  H01M4/36 ,  H01M2/14

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：US20170288256A1

公开(公告)日：2017-10-05

申请号：US15622995

申请日：2017-06-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya MIWA ,  Kuniharu NOMOTO ,  Nobuhiro INOUE

IPC: H01M10/04 ,  H01M4/58

CPC classification number: H01G9/042 ,  B82Y30/00 ,  H01M4/5825 ,  H01M4/622 ,  H01M4/625 ,  H01M10/04 ,  Y10T29/417 ,  Y10T29/49115

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：US20170054141A1

公开(公告)日：2017-02-23

申请号：US15342860

申请日：2016-11-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kuniharu NOMOTO ,  Takuya MIWA ,  Masaki YAMAKAJI ,  Takahiro KAWAKAMI

IPC: H01M4/1397 ,  H01M4/62 ,  H01M4/36 ,  H01M4/58 ,  H01M4/04 ,  H01M4/38

CPC classification number: H01M4/1397 ,  H01M4/0433 ,  H01M4/0471 ,  H01M4/136 ,  H01M4/366 ,  H01M4/38 ,  H01M4/5825 ,  H01M4/625 ,  H01M2004/028 ,  Y02E60/122 ,  Y02P70/54

Abstract: An energy storage device having high capacity per weight or volume and a positive electrode active material for the energy storage device are manufactured. A surface of a main material included in the positive electrode active material for the energy storage device is coated with two-dimensional carbon. The main material included in the positive electrode active material is coated with a highly conductive material which has a structure expanding two-dimensionally and whose thickness is ignorable, whereby the amount of carbon coating can be reduced and an energy storage device having capacity close to theoretical capacity can be obtained even when a conduction auxiliary agent is not used or the amount of the conduction auxiliary agent is extremely small. Accordingly, the amount of carbon coating in a positive electrode and the volume of the conduction auxiliary agent can be reduced; consequently, the volume of the positive electrode can be reduced.

Abstract translation: 制造具有高容量/重量或体积的储能装置和用于储能装置的正极活性物质。 包含在能量储存装置的正极活性物质中的主要材料的表面涂覆有二维碳。 包含在正极活性物质中的主要材料涂覆有具有二维膨胀并且其厚度可忽略的结构的高导电性材料，由此可以减少碳涂层的量，并且具有接近理论值的能量存储装置 即使不使用导电助剂或导电助剂的量极少，也可以获得容量。 因此，可以减少正极中的碳涂覆量和导电助剂的体积; 因此，可以减小正极的体积。

公开(公告)号：US20240030436A1

公开(公告)日：2024-01-25

申请号：US18373510

申请日：2023-09-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya MIWA ,  Kuniharu NOMOTO ,  Junpei MOMO

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

CPC classification number: H01M4/5825 ,  C01D15/02 ,  C01G45/006 ,  C01G49/009 ,  C01G51/006 ,  C01G53/006 ,  C30B7/10 ,  H01M4/364 ,  H01M4/587 ,  C30B29/14

Abstract: A hydrothermal synthesis for LiFePO4 is provided. First, each raw material solution is prepared using a degassed water in advance, second, those solution are mixed by dripping in a fixed order, and then those materials are reacted in a hydrothermal synthesis, so that LiFePO4 is obtained in a predesigned form.

公开(公告)号：US20230299305A1

公开(公告)日：2023-09-21

申请号：US18202523

申请日：2023-05-26

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Teruaki OCHIAI ,  Takahiro KAWAKAMI ,  Takuya MIWA

IPC: H01M4/66 ,  H01M4/131 ,  H01M4/587 ,  H01M4/36 ,  H01M4/62 ,  H01G11/50 ,  H01G11/36 ,  H01G11/86 ,  H01G11/38

CPC classification number: H01M4/663 ,  H01M4/131 ,  H01M4/587 ,  H01M4/366 ,  H01M4/625 ,  H01G11/50 ,  H01G11/36 ,  H01G11/86 ,  H01G11/38 ,  H01M10/0525

Abstract: A novel electrode is provided. A novel power storage device is provided. A conductor having a sheet-like shape is provided. The conductor has a thickness of greater than or equal to 800 nm and less than or equal to 20 μm. The area of the conductor is greater than or equal to 25 mm2 and less than or equal to 10 m2. The conductor includes carbon and oxygen. The conductor includes carbon at a concentration of higher than 80 atomic % and oxygen at a concentration of higher than or equal to 2 atomic % and lower than or equal to 20 atomic %.

公开(公告)号：US20230246224A1

公开(公告)日：2023-08-03

申请号：US18132504

申请日：2023-04-10

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Minoru TAKAHASHI ,  Yuugo GOTO ,  Yumiko YONEDA ,  Takuya MIWA ,  Ryota TAJIMA

IPC: H01M10/04 ,  H01M50/176 ,  H01M50/121 ,  H01M50/119 ,  H01M50/116 ,  H01M50/543

CPC classification number: H01M10/0436 ,  H01M50/176 ,  H01M50/121 ,  H01M50/119 ,  H01M50/116 ,  H01M50/543 ,  H01M50/124

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 which is resistant to external force in obtained. An opening is provided in a central portion of the secondary battery, and a terminal is formed in the opening. An outer edge of the secondary battery is fixed by thermocompression bonding. In addition, the central portion of the secondary battery is fixed by thermocompression bonding, so that the amount of bending is limited even when the outer edge portion of the secondary battery is bent.

公开(公告)号：US20220199998A1

公开(公告)日：2022-06-23

申请号：US17692502

申请日：2022-03-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya MIWA ,  Kuniharu NOMOTO ,  Junpei MOMO

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

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.