公开(公告)号：US20240347760A1

公开(公告)日：2024-10-17

申请号：US18293877

申请日：2022-07-26

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazuya SHIMADA ,  Yohei MOMMA ,  Shuhei YOSHITOMI ,  Fumiko TANAKA ,  Kazutaka KURIKI

IPC: H01M10/0525 ,  H01M4/02 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0568 ,  H01M10/44

CPC classification number: H01M10/0525 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0568 ,  H01M10/443 ,  H01M2004/021

Abstract: A lithium ion battery having an excellent discharge characteristics even at temperatures below freezing is to be provided. The lithium ion battery includes a positive electrode including a positive electrode active material, an electrolyte, and a negative electrode including a negative electrode active material that is a carbon material. In the lithium ion battery, a value of discharge capacity obtained by, after performing constant current charging at a charge rate of 0.1 C (where 1 C=200 mA/g) until a voltage reaches 4.5 V and then performing constant voltage charging at 4.5 V until a current value achieves 0.01 C in an environment of 25° C., performing constant current discharging at a discharge rate of 0.1 C until a voltage reaches 2.5 V in an environment of −40° C. is higher than or equal to 50% of a value of discharge capacity obtained by, after performing constant current charging at a charge rate of 0.1 C (where 1 C=200 mA/g) until a voltage reaches 4.5 V and then performing constant voltage charging at 4.5 V until a current value achieves 0.01 C in an environment of 25° C., performing constant current discharging at a discharge rate of 0.1 C until a voltage reaches 2.5V in an environment of 25° C.

公开(公告)号：US20240097194A1

公开(公告)日：2024-03-21

申请号：US18039505

申请日：2021-12-03

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kaori OGITA ,  Kazuya SHIMADA ,  Takashi HIRAHARA ,  Fumiko TANAKA ,  Shotaro MURATSUBAKI ,  Satoshi SEO

IPC: H01M10/0569 ,  C01G53/00 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0567

CPC classification number: H01M10/0569 ,  C01G53/66 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0567 ,  C01P2002/72 ,  C01P2002/76 ,  C01P2006/40 ,  H01M2004/028

Abstract: A novel ionic liquid is provided. A highly safe secondary battery with high charge and discharge capacity is provided. The ionic liquid includes a cation represented by General Formula (G1) and an anion represented by Structural Formula (200). In the formula, X1 to X3 each independently represent any one of fluorine, chlorine, bromine, and iodine. One of X1 to X3 may be hydrogen. In addition, n and m each independently represent 0 to 5. Furthermore, a secondary battery including the above-described ionic liquid is provided.

公开(公告)号：US20240097278A1

公开(公告)日：2024-03-21

申请号：US18029779

申请日：2021-10-19

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kaori OGITA ,  Tetsuji ISHITANI ,  Shuhei YOSHITOMI ,  Fumiko TANAKA ,  Shotaro MURATSUBAKI ,  Teppei OGUNI

IPC: H01M50/451 ,  H01M10/0525 ,  H01M50/403 ,  H01M50/434 ,  H01M50/491

CPC classification number: H01M50/451 ,  H01M10/0525 ,  H01M50/403 ,  H01M50/434 ,  H01M50/491

Abstract: A secondary battery with little deterioration is provided. A secondary battery with high safety is provided. A separator having excellent characteristics is provided. A separator achieving the secondary battery with high safety is provided. A novel separator is provided. In the separator, a polymer porous film and a layer including a ceramic-based material containing a metal oxide microparticle are stacked, the thickness of the layer including a ceramic-based material is greater than or equal to 1 μm and less than or equal to 100 μm, and the film thickness of the polymer porous film is greater than or equal to 4 μm and less than or equal to 50 μm.

公开(公告)号：US20230141951A1

公开(公告)日：2023-05-11

申请号：US17905093

申请日：2021-03-01

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Hiroshi KADOMA ,  Kazutaka KURIKI ,  Yumiko YONEDA ,  Kaori OGITA ,  Fumiko TANAKA ,  Yohei MOMMA ,  Shunpei YAMAZAKI

IPC: H01M10/0565 ,  H01M4/38 ,  H01M4/04

CPC classification number: H01M10/0565 ,  H01M4/386 ,  H01M4/0404 ,  H01M2004/027 ,  H01M2300/0082

Abstract: Interface contact between a polymer electrolyte and an active material layer is improved. A secondary battery with improved discharge capacity is provided. The secondary battery includes a positive electrode, a negative electrode, and an electrolyte layer between the positive electrode and the negative electrode. The positive electrode includes a positive electrode active material, a first lithium-ion conductive polymer, a first lithium salt, and a conductive material over a positive electrode current collector. The electrolyte layer includes a second lithium-ion conductive polymer and a second lithium salt. The conductive material is preferably graphene. The negative electrode preferably includes a negative electrode active material, a third lithium-ion conductive polymer, a third lithium salt, and a second conductive material over a negative electrode current collector.

公开(公告)号：US20240047751A1

公开(公告)日：2024-02-08

申请号：US18265913

申请日：2021-12-02

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kaori OGITA ,  Fumiko TANAKA ,  Shotaro MURATSUBAKI ,  Tetsuji ISHITANI ,  Shunpei YAMAZAKI

IPC: H01M10/0568 ,  H01M10/0525

CPC classification number: H01M10/0568 ,  H01M10/0525 ,  H01M2220/20

Abstract: A lithium-ion secondary battery with high capacity and excellent charge and discharge cycle performance is provided. A secondary battery with high capacity is provided. A secondary battery with excellent charge and discharge characteristics is provided. A secondary battery in which a reduction in capacity is inhibited even when a state being charged with a high voltage is held for a long time is provided. A secondary battery includes a positive electrode, a negative electrode, and an electrolyte, and the amount of moisture in the electrolyte is less than 1000 ppm.

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：US20220173429A1

公开(公告)日：2022-06-02

申请号：US17530763

申请日：2021-11-19

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masayuki KIMURA ,  Kaori OGITA ,  Fumiko TANAKA ,  Shotaro MURATSUBAKI

IPC: H01M10/0525 ,  H01M4/525 ,  H01M10/0569 ,  H01M10/0568

Abstract: A storage battery that is less likely to be affected by the ambient temperature is provided. A storage battery that can be charged and discharged at low temperatures is provided. In the storage battery, a secondary battery that can be charged and discharged at low temperatures is provided adjacent to a general secondary battery. The storage battery having such a structure can use, as an internal heat source in a low temperature environment, heat generated by charging and discharging of the secondary battery that can be charged and discharged at low temperatures. Specifically, the storage battery includes a first lithium-ion secondary battery and a second lithium-ion secondary battery adjacent to each other. The first lithium-ion secondary battery contains at least one of an ionic liquid, a molecular crystalline electrolyte, a semi-solid-state electrolyte, an all-solid-state electrolyte, and lithium titanate. The second lithium-ion secondary battery contains an organic electrolyte solution.