公开(公告)号：US20250125329A1

公开(公告)日：2025-04-17

申请号：US18999021

申请日：2024-12-23

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Ryota TAJIMA ,  Yumiko YONEDA ,  Shunpei YAMAZAKI

IPC: H01M4/04 ,  C23C14/04 ,  C23C14/56 ,  H01M10/0562 ,  H01M10/0585

Abstract: An object is to achieve a manufacturing apparatus that can fully automate the manufacturing of a solid-state secondary battery. A mask alignment chamber, a first transfer chamber connected to the mask alignment chamber, a second transfer chamber connected to the first transfer chamber, a first film formation chamber connected to the second transfer chamber, a third transfer chamber connected to the first transfer chamber, and a second film formation chamber connected to the third transfer chamber are included. The first film formation chamber has a function of forming a positive electrode active material layer or a negative electrode active material layer by a sputtering method, the second film formation chamber has a function of forming a solid electrolyte layer by co-evaporation of an organic complex of lithium and SiOx (0

公开(公告)号：US20250087684A1

公开(公告)日：2025-03-13

申请号：US18798072

申请日：2024-08-08

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shuji FUKAI ,  Kazutaka KURIKI ,  Yumiko YONEDA ,  Yosiharu ASADA ,  Kazuya SHIMADA

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/04 ,  H01M10/0525 ,  H01M10/0569

Abstract: A method for forming a positive electrode active material applicable to a lithium-ion battery having excellent charge and discharge characteristics even in a low-temperature environment is provided. The method for forming a positive electrode active material includes: a first step of heating lithium cobalt oxide with a median diameter of less than or equal to 10 μm; a second step of mixing a fluorine source and a magnesium source with the lithium cobalt oxide subjected to the first step, thereby forming a first mixture; a third step of heating the first mixture; a fourth step of mixing a nickel source and an aluminum source with the first mixture subjected to the third step, thereby forming a second mixture; and a fifth step of heating the second mixture. The third step and the fifth step are performed in a state where the first mixture is held to have a thickness of less than or equal to 2.0 mm in a first setter. The first step, the third step, and the fifth step are performed in an atmosphere containing oxygen.

公开(公告)号：US20250007051A1

公开(公告)日：2025-01-02

申请号：US18707723

申请日：2022-10-31

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Yumiko YONEDA ,  Seiya SAITO ,  Tatsuyoshi TAKAHASHI

IPC: H01M50/129 ,  H01M50/54

Abstract: A secondary battery that has flexibility and can inhibit degradation of a positive electrode lead connection portion or a negative electrode lead connection portion is provided. The secondary battery has a structure in which a positive electrode lead is connected to a positive electrode current collector exposed portion of a first positive electrode and a positive electrode current collector exposed portion of a second positive electrode while penetrating through the inner side of one opening portion of a first separator, an opening portion of a first negative electrode, and one opening portion of a second separator; a negative electrode lead is connected to a negative electrode current collector exposed portion of a first negative electrode while penetrating through the inner side of the other opening portion of the first separator; and the negative electrode lead and the negative electrode current collector exposed portion of the first negative electrode are connected to a negative electrode current collector exposed portion of a second negative electrode while penetrating through the inner side of the other opening portion of the second separator, an opening portion of the first positive electrode, an opening portion of the second positive electrode, and the other opening portion provided in a third separator.

公开(公告)号：US20230238583A1

公开(公告)日：2023-07-27

申请号：US17925357

申请日：2021-05-10

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kaori OGITA ,  Kazutaka KURIKI ,  Yumiko YONEDA ,  Hiroshi KADOMA ,  Kunihiko SUZUKI ,  Yuji IWAKI ,  Shunpei YAMAZAKI

IPC: H01M10/0569 ,  H01M4/583

CPC classification number: H01M10/0569 ,  H01M4/583 ,  H01M2004/028

Abstract: According to one embodiment of the present invention, a secondary battery that can be used at a wide range of temperatures and is less likely to be influenced by an environmental temperature is provided. Furthermore, a secondary battery with high safety is provided. An electrolyte obtained by mixing an acyclic ester having high temperature characteristics with a fluorinated carbonic ester at 5 vol. % or higher, preferably 20 vol. % or higher, is used for the purpose of reducing interface resistance between an electrode and an electrolyte, whereby a secondary battery capable of operating at a wide range of temperatures, specifically, at temperatures higher than or equal to −40° C. and lower than or equal to 150° C., preferably higher than or equal to −40° C. and lower than or equal to 85° C. can be achieved.

公开(公告)号：US20230231199A1

公开(公告)日：2023-07-20

申请号：US18001623

申请日：2021-06-30

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kaori OGITA ,  Hiroshi KADOMA ,  Fumiko TANAKA ,  Kazutaka KURIKI ,  Yumiko YONEDA ,  Shotaro MURATSUBAKI ,  Kaori FUJIE ,  Taku ICHINO

IPC: H01M10/0569 ,  H01M10/0568

CPC classification number: H01M10/0569 ,  H01M10/0568 ,  H01M2300/0034

Abstract: An object is to provide a nonaqueous solvent, a secondary battery, or a vehicle having a wide usable temperature range and high heat resistance. The nonaqueous solvent of the present invention contains an ionic liquid at greater than or equal to 50 vol % and less than or equal to 95 vol % and a fluorinated cyclic carbonate, and the ionic liquid contains an imidazolium cation. The nonaqueous solvent of the present invention has low viscosity at low temperatures and high heat resistance, thereby having a wide usable temperature range.

公开(公告)号：US20230207800A1

公开(公告)日：2023-06-29

申请号：US18083622

申请日：2022-12-19

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazuki TANEMURA ,  Yumiko YONEDA ,  Mayumi MIKAMI ,  Kazutaka KURIKI

IPC: H01M4/525 ,  H01M4/66 ,  H01M10/0525

CPC classification number: H01M4/525 ,  H01M4/667 ,  H01M4/661 ,  H01M10/0525 ,  H01M2004/028

Abstract: To provide a positive electrode active material film that does not have a (003) orientation and has a layered rock-salt crystal structure even though an inexpensive substrate such as a glass substrate is used, and a positive electrode including the positive electrode active material film. The positive electrode includes a substrate, a positive electrode current collector film, and the positive electrode active material film. The positive electrode current collector film has a stacked structure of a titanium film and a titanium nitride film. The titanium film has a crystal structure belonging to a space group P63/mmc and a (101) orientation, the titanium nitride film has a crystal structure belonging to a space group Fm-3m and a (311) orientation, and the positive electrode active material film has a layered rock-salt crystal structure and a (116) orientation.

公开(公告)号：US20220285681A1

公开(公告)日：2022-09-08

申请号：US17750436

申请日：2022-05-23

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Mayumi MIKAMI ,  Aya UCHIDA ,  Yumiko YONEDA ,  Yohei MOMMA ,  Masahiro TAKAHASHI ,  Teruaki OCHIAI

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/139 ,  H01M4/36 ,  H01M4/505 ,  H01M10/0525 ,  H01M6/16

Abstract: A positive electrode active material having high capacity and excellent cycle performance is provided. The positive electrode active material has a small difference in a crystal structure between the charged state and the discharged state. For example, the crystal structure and volume of the positive electrode active material, which has a layered rock-salt crystal structure in the discharged state and a pseudo-spinel crystal structure in the charged state at a high voltage of approximately 4.6 V, are less likely to be changed by charge and discharge as compared with those of a known positive electrode active material.

公开(公告)号：US20220209214A1

公开(公告)日：2022-06-30

申请号：US17606861

申请日：2020-04-16

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Ryota TAJIMA ,  Yumiko YONEDA ,  Shunpei YAMAZAKI

IPC: H01M4/04 ,  C23C14/04 ,  H01M10/0562 ,  H01M10/0585

Abstract: An object is to achieve a manufacturing apparatus that can fully automate the manufacturing of a solid-state secondary battery. A mask alignment chamber, a first transfer chamber connected to the mask alignment chamber, a second transfer chamber connected to the first transfer chamber, a first film formation chamber connected to the second transfer chamber, a third transfer chamber connected to the first transfer chamber, and a second film formation chamber connected to the third transfer chamber are included. The first film formation chamber has a function of forming a positive electrode active material layer or a negative electrode active material layer by a sputtering method, the second film formation chamber has a function of forming a solid electrolyte layer by co-evaporation of an organic complex of lithium and SiOx (0

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.