公开(公告)号：US12087935B2

公开(公告)日：2024-09-10

申请号：US18214109

申请日：2023-06-26

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teppei Oguni ,  Takuya Miwa

IPC: H01M4/136 ,  C01B25/45 ,  H01M4/36 ,  H01M4/58 ,  H01M10/0525 ,  H01M10/42 ,  H01M4/02

CPC classification number: H01M4/136 ,  C01B25/45 ,  H01M4/366 ,  H01M4/5825 ,  H01M10/0525 ,  H01M10/425 ,  H01M2004/028 ,  H01M2010/4278 ,  H01M2220/20 ,  H01M2220/30 ,  Y02E60/10 ,  Y02T10/70

Abstract: A lithium-ion secondary battery including a lithium-containing complex phosphate as a positive electrode active material is provided. Furthermore, a positive electrode active material with high diffusion rate of lithium ions is provided to provide a lithium-ion secondary battery with high output. A positive electrode active material of a lithium-ion secondary battery includes a first plate-like component and a second plate-like component, a third prismatic component between the first component and the second component, and a space between the first component and the second component.

公开(公告)号：US11728469B2

公开(公告)日：2023-08-15

申请号：US17316986

申请日：2021-05-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teppei Oguni ,  Takuya Miwa

IPC: H01M10/0525 ,  H01M4/136 ,  C01B25/45 ,  H01M4/36 ,  H01M4/58 ,  H01M10/42 ,  H01M4/02

CPC classification number: H01M4/136 ,  C01B25/45 ,  H01M4/366 ,  H01M4/5825 ,  H01M10/0525 ,  H01M10/425 ,  H01M2004/028 ,  H01M2010/4278 ,  H01M2220/20 ,  H01M2220/30 ,  Y02E60/10 ,  Y02T10/70

Abstract: A lithium-ion secondary battery including a lithium-containing complex phosphate as a positive electrode active material is provided. Furthermore, a positive electrode active material with high diffusion rate of lithium ions is provided to provide a lithium-ion secondary battery with high output. A positive electrode active material of a lithium-ion secondary battery includes a first plate-like component and a second plate-like component, a third prismatic component between the first component and the second component, and a space between the first component and the second component.

公开(公告)号：US11296322B2

公开(公告)日：2022-04-05

申请号：US16862651

申请日：2020-04-30

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teppei Oguni ,  Takeshi Osada ,  Toshihiko Takeuchi ,  Kuniharu Nomoto

IPC: H01M4/587 ,  B82Y40/00 ,  H01M4/133 ,  C25D5/50 ,  C25D5/48 ,  C25D13/12 ,  H01M4/04 ,  C25D13/02 ,  B82Y30/00 ,  H01M4/70 ,  H01M4/66 ,  H01M4/1393

Abstract: Graphene is formed with a practically uniform thickness on an uneven object. The object is immersed in a graphene oxide solution, and then taken out of the solution and dried; alternatively, the object and an electrode are immersed therein and voltage is applied between the electrode and the object used as an anode. Graphene oxide is negatively charged, and thus is drawn to and deposited on a surface of the object, with a practically uniform thickness. After that, the object is heated in vacuum or a reducing atmosphere, so that the graphene oxide is reduced to be graphene. In this manner, a graphene layer with a practically uniform thickness can be formed even on a surface of the uneven object.

公开(公告)号：US11024878B2

公开(公告)日：2021-06-01

申请号：US16544958

申请日：2019-08-20

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Hiroshi Kadoma ,  Teppei Oguni ,  Satoshi Seo

IPC: H01M10/0565 ,  C01B32/194 ,  C01B32/23 ,  C01B32/198 ,  H01M10/0585 ,  H01M50/116 ,  H01M10/0525

Abstract: A material that can be used in a wide temperature range is provided. A graphene compound includes graphene or graphene oxide and a substituted or unsubstituted chain group, the chain group includes two or more ether bonds, and the chain group is bonded to the above graphene or graphene oxide through a Si atom. Alternatively, a method for forming a graphene compound includes a first step and a second step after the first step. In the first step, graphene oxide and a base are stirred under a nitrogen stream. In the second step, the mixture is cooled to room temperature, a silylating agent that has a group having two or more ether bonds is introduced into the mixture, and the obtained mixture is stirred. The base is butylamine, pentylamine, hexylamine, diethylamine, dipropylamine, dibutylamine, triethylamine, tripropylamine, or pyridine.

公开(公告)号：US10985369B2

公开(公告)日：2021-04-20

申请号：US16893726

申请日：2020-06-05

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya Miwa ,  Yumiko Yoneda ,  Teppei Oguni

IPC: H01M4/58 ,  C01B25/45 ,  H01M4/02 ,  H01M10/0525

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：US10535899B2

公开(公告)日：2020-01-14

申请号：US15371820

申请日：2016-12-07

Applicant: Semiconductor Energy Laboratory Co., LTD.

Inventor： Kazuhei Narita ,  Ryota Tajima ,  Teppei Oguni

IPC: H01M10/0569 ,  G04G19/00 ,  H01G11/28 ,  H01G11/32 ,  H01G11/52 ,  H01G11/60 ,  H01G11/62 ,  H01G11/86 ,  H01M2/16 ,  H01M4/525 ,  H01M4/587 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/0568 ,  H01G11/84 ,  H01M4/36

Abstract: To provide a power storage device whose charge and discharge characteristics are unlikely to be degraded by heat treatment. To provide a power storage device that is highly safe against heat treatment. The power storage device includes a positive electrode, a negative electrode, a separator, an electrolytic solution, and an exterior body. The separator is located between the positive electrode and the negative electrode. The separator contains polyphenylene sulfide or solvent-spun regenerated cellulosic fiber. The electrolytic solution contains a solute and two or more kinds of solvents. The solute contains LiBETA. One of the solvents is propylene carbonate.

公开(公告)号：US10230095B2

公开(公告)日：2019-03-12

申请号：US15156524

申请日：2016-05-17

Applicant: Semiconductor Energy Laboratory Co., LTD.

Inventor： Kai Kimura ,  Tatsuya Ikenuma ,  Nobuhiro Inoue ,  Teppei Oguni

IPC: H01M4/133 ,  H01M4/36 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/38 ,  H01M10/052 ,  H01M4/02

Abstract: To provide a power storage device with a high capacity. To provide a power storage device with a high energy density. To provide a highly reliable power storage device. To provide a long-life power storage device. To provide an electrode with a high capacity. To provide an electrode with a high energy density. To provide a highly reliable electrode. To provide a long-life electrode. The power storage device includes a first electrode and a second electrode. The first electrode includes a first current collector and a first active material layer. The first active material layer includes a first active material and a first binder. The first active material is graphite. A separation strength F of the first electrode that is measured when the first active material layer is separated from the first current collector after the first electrode is immersed in a solution at a temperature higher than or equal to 20° C. and lower than or equal to 70° C. for longer than or equal to three hours is higher than or equal to 0.05 N/cm and lower than or equal to 5 N/cm per unit width of a sample that is separated.

公开(公告)号：US10147556B2

公开(公告)日：2018-12-04

申请号：US14659651

申请日：2015-03-17

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Aya Uchida ,  Teppei Oguni ,  Rie Yokoi ,  Jun Ishikawa

IPC: H01G11/24 ,  H01G11/28 ,  H01G11/26 ,  H01M2/08 ,  H01M2/22 ,  H01M2/24 ,  H01M2/26 ,  H01M4/64 ,  H01G11/62 ,  H01M10/0569 ,  H01G11/06 ,  H01G11/60 ,  H01M10/052 ,  H01G11/52

Abstract: A power storage device with high capacity, a power storage device with high energy density, a highly reliable power storage device, and a long-life power storage device are provided. The power storage device includes a positive electrode, a separator, a negative electrode, and an electrolytic solution. The electrolytic solution contains an alkali metal salt and an ionic liquid. The separator is located between the positive electrode and the negative electrode. At least part of the positive electrode overlaps with the negative electrode. At least part of an end portion of the negative electrode is located inside a region between end portions of the positive electrode.

公开(公告)号：US09653728B2

公开(公告)日：2017-05-16

申请号：US14969949

申请日：2015-12-15

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya Hirohashi ,  Teppei Oguni

IPC: H01M4/583 ,  H01M4/38 ,  B82Y30/00 ,  H01G11/32 ,  H01M4/587 ,  H01M10/0525 ,  B82Y40/00

CPC classification number: H01M4/386 ,  B82Y30/00 ,  B82Y40/00 ,  H01G11/32 ,  H01M4/583 ,  H01M4/587 ,  H01M10/0525 ,  H01M2220/20 ,  H01M2220/30 ,  Y02E60/122 ,  Y02E60/13 ,  Y02P70/54 ,  Y02T10/7011 ,  Y02T10/7022

Abstract: An object is to provide graphene which has high conductivity and is permeable to ions of lithium or the like. Another object is to provide, with use of the graphene, a power storage device with excellent charging and discharging characteristics. Graphene having a hole inside a ring-like structure formed by carbon and nitrogen has conductivity and is permeable to ions of lithium or the like. The nitrogen concentration in graphene is preferably higher than or equal to 0.4 at. % and lower than or equal to 40 at. %. With use of such graphene, ions of lithium or the like can be preferably made to pass; thus, a power storage device with excellent charging and discharging characteristics can be provided.

公开(公告)号：US11088363B2

公开(公告)日：2021-08-10

申请号：US15446041

申请日：2017-03-01

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teppei Oguni ,  Takuya Miwa

IPC: H01M4/136 ,  C01B25/45 ,  H01M4/36 ,  H01M4/58 ,  H01M10/0525 ,  H01M10/42 ,  H01M4/02

Abstract: A lithium-ion secondary battery including a lithium-containing complex phosphate as a positive electrode active material is provided. Furthermore, a positive electrode active material with high diffusion rate of lithium ions is provided to provide a lithium-ion secondary battery with high output. A positive electrode active material of a lithium-ion secondary battery includes a first plate-like component and a second plate-like component, a third prismatic component between the first component and the second component, and a space between the first component and the second component.