公开(公告)号：US20190280337A1

公开(公告)日：2019-09-12

申请号：US16462420

申请日：2017-11-22

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kazuhei NARITA ,  Ryota TAJIMA

IPC: H01M10/0569 ,  H01G11/52 ,  H01G11/60 ,  H01G11/62 ,  H01G11/68 ,  H01G11/78 ,  H01M10/052 ,  H01M10/0568 ,  H01M2/02 ,  H01M2/10 ,  H01M2/16 ,  H01M4/66

Abstract: Provided is a power storage device whose charging and discharging characteristics are unlikely to be degraded by heat treatment or 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 electrolyte, and an exterior body. The separator is positioned between the positive electrode and the negative electrode and includes polyphenylene sulfide or cellulosic fiber. The electrolyte includes propylene carbonate, ethylene carbonate, and vinylene carbonate, lithium hexafluorophosphate, and lithium bis(pentafluoroethanesulfonyl)amide. A concentration of lithium hexafluorophosphate with respect to the electrolyte is more than or equal to 0.01 wt % and less than or equal to 1.9 wt % in a weight ratio.

公开(公告)号：US20170170521A1

公开(公告)日：2017-06-15

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

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：US20250105277A1

公开(公告)日：2025-03-27

申请号：US18970314

申请日：2024-12-05

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yohei MOMMA ,  Mayumi MIKAMI ,  Teruaki OCHIAI ,  Kazuhei NARITA ,  Jyo SAITO

IPC: H01M4/525 ,  B60L58/12 ,  H01M4/38 ,  H01M4/58 ,  H01M10/0525 ,  H01M10/42 ,  H05K5/00

Abstract: A positive electrode active material for a lithium ion secondary battery which has a large capacity and a good charge-and-discharge cycle performance is provided. The positive electrode active material includes lithium, cobalt, oxygen, and magnesium, and has a compound represented by a layered rock-salt crystal structure. A space group of the compound is represented by R-3m. The compound is a composite oxide in which magnesium is substituted for a lithium position and a cobalt position. The compound is a particle. The magnesium substituted for a lithium position and a cobalt position exists more in the region from the surface to 5 nm than in the region deeper than 10 nm from the surface. More magnesium is substituted for a lithium position than for a cobalt position.

公开(公告)号：US20240363905A1

公开(公告)日：2024-10-31

申请号：US18763137

申请日：2024-07-03

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kazuhei NARITA ,  Ryota TAJIMA

IPC: H01M10/0569 ,  H01G11/52 ,  H01G11/60 ,  H01G11/62 ,  H01G11/68 ,  H01G11/78 ,  H01M4/66 ,  H01M10/052 ,  H01M10/0568 ,  H01M50/119 ,  H01M50/121 ,  H01M50/129 ,  H01M50/136 ,  H01M50/178 ,  H01M50/429 ,  H01M50/44 ,  H01M50/55 ,  H01M50/557

CPC classification number: H01M10/0569 ,  H01G11/52 ,  H01G11/60 ,  H01G11/62 ,  H01G11/68 ,  H01G11/78 ,  H01M4/661 ,  H01M4/662 ,  H01M10/052 ,  H01M10/0568 ,  H01M50/136 ,  H01M50/178 ,  H01M50/4295 ,  H01M50/44 ,  H01M50/55 ,  H01M50/557 ,  H01M50/119 ,  H01M50/121 ,  H01M50/129 ,  H01M2220/30 ,  Y02E60/13

Abstract: Provided is a power storage device whose charging and discharging characteristics are unlikely to be degraded by heat treatment or 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 electrolyte, and an exterior body. The separator is positioned between the positive electrode and the negative electrode and includes polyphenylene sulfide or cellulosic fiber. The electrolyte includes propylene carbonate, ethylene carbonate, and vinylene carbonate, lithium hexafluorophosphate, and lithium bis(pentafluoroethanesulfonyl)amide. A concentration of lithium hexafluorophosphate with respect to the electrolyte is more than or equal to 0.01 wt % and less than or equal to 1.9 wt % in a weight ratio.

公开(公告)号：US20230335733A1

公开(公告)日：2023-10-19

申请号：US18138790

申请日：2023-04-25

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Mayumi MIKAMI ,  Yohei MOMMA ,  Kazutaka KURIKI ,  Kazuhei NARITA

IPC: H01M4/58 ,  H01M10/0525 ,  H01M10/0562 ,  H01M50/446

CPC classification number: H01M4/582 ,  H01M10/0525 ,  H01M10/0562 ,  H01M50/446 ,  H01M2004/028

Abstract: A conduction path in an all-solid-state secondary battery is difficult to keep with a volume change in an active material due to charging and discharging in some cases. A positive electrode active material with a small volume change between the charged state and the discharged state is used for an all-solid-state secondary battery. For example, a positive electrode active material that has a layered rock-salt crystal structure in the discharged state and a crystal structure similar to the cadmium chloride type crystal structure in the charged state with a depth of charge of approximately 0.8 changes less in its volume and crystal structure between charging and discharging than known positive electrode active materials.

公开(公告)号：US20230246183A1

公开(公告)日：2023-08-03

申请号：US18007789

申请日：2021-06-02

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Jo SAITO ,  Yohei MOMMA ,  Mayumi MIKAMI ,  Teruaki OCHIAI ,  Yusuke YOSHITANI ,  Azusa KIKUCHI ,  Kazuhei NARITA

IPC: H01M4/525 ,  H01M4/36 ,  H01M4/131 ,  C01G53/00

CPC classification number: H01M4/525 ,  H01M4/366 ,  H01M4/131 ,  C01G53/66 ,  H01M2004/028

Abstract: According to one embodiment of the present invention, a positive electrode active material with high charge and discharge capacity is provided. Alternatively, a positive electrode active material with high charge and discharge voltage is provided. Alternatively, a positive electrode active material with little deterioration is provided. To improve the reliability of the positive electrode active material, the surface of the positive electrode active material is prevented from reacting with an electrolyte solution and being reduced. The provision of a projection on part of the positive electrode active material surface decreases the reduction of the positive electrode active material surface from reacting with the electrolyte solution, thereby improving the cycle performance.

公开(公告)号：US20230028284A1

公开(公告)日：2023-01-26

申请号：US17788369

申请日：2020-12-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teruaki OCHIAI ,  Yumiko YONEDA ,  Kazuhei NARITA ,  Kazutaka KURIKI

IPC: H01M4/04 ,  H01M4/62

Abstract: A method for manufacturing a novel electrode is provided. The method includes the steps of applying, to a current collector, a mixture comprising an active material, a conductive additive comprising a graphene compound, a binder, and a dispersion medium; performing a drying treatment on the mixture; performing a heat treatment on the mixture at a temperature higher than a temperature of the drying treatment; reducing the graphene compound in the mixture by a chemical reaction using a reducing agent; and performing a thermal reduction treatment on the mixture at a temperature higher than the temperature of the heat treatment.

公开(公告)号：US20170301896A1

公开(公告)日：2017-10-19

申请号：US15471261

申请日：2017-03-28

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Ryota TAJIMA ,  Kazuhei NARITA ,  Kensuke YOSHIZUMI

IPC: H01M2/10 ,  H01M2/02 ,  H01M2/26 ,  H01M2/30

CPC classification number: H01M2/1061 ,  H01M2/0275 ,  H01M2/20 ,  H01M2/26 ,  H01M2/30 ,  H01M2220/30

Abstract: A battery module with high impact resistance is provided. A battery module using an elastic body such as rubber for its exterior body covering a battery is provided. A bendable battery module is provided. As the exterior body covering a battery, an elastic body such as rubber is used, and the exterior body is molded in two steps. First, a first portion provided with a depression in which a battery is stored is molded using a first mold. Next, a battery is inserted into the first portion. Subsequently, second molding is performed using a second mold so as to fill an opening of the depression in the first portion, so that a second portion is formed. The second portion serves as a cover for closing the opening of the depression in the first portion. The second portion is formed in contact with part of the electrodes in the battery and part of an end portion of the second exterior body in the battery.

公开(公告)号：US20240258575A1

公开(公告)日：2024-08-01

申请号：US18613703

申请日：2024-03-22

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 ,  H01G11/84 ,  H01G11/86 ,  H01M4/36 ,  H01M4/525 ,  H01M4/587 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/0568 ,  H01M50/414 ,  H01M50/429 ,  H01M50/44

CPC classification number: H01M10/0569 ,  G04G19/00 ,  H01G11/28 ,  H01G11/32 ,  H01G11/52 ,  H01G11/60 ,  H01G11/62 ,  H01G11/84 ,  H01G11/86 ,  H01M4/366 ,  H01M4/525 ,  H01M4/587 ,  H01M4/661 ,  H01M4/669 ,  H01M10/0525 ,  H01M10/0568 ,  H01M50/414 ,  H01M50/429 ,  H01M50/4295 ,  H01M50/44 ,  H01M2300/0037 ,  Y02E60/13 ,  Y02T10/70

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：US20220029159A1

公开(公告)日：2022-01-27

申请号：US17312082

申请日：2019-12-02

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yohei MOMMA ,  Jyo SAITO ,  Teruaki OCHIAI ,  Kazuhei NARITA ,  Kazuhito MACHIKAWA ,  Mayumi MIKAMI

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/36 ,  C01G53/00

Abstract: An object is to provide a method for manufacturing a positive electrode active material that achieves high powder properties and high load resistance (e.g., rate performance and output resistance) when used in a lithium-ion secondary battery, within a short manufacturing cycle time and at low cost. To perform heat treatment at temperatures lower than the melting point of magnesium fluorine, lithium fluoride is mixed to melt magnesium fluorine and modify the surface of lithium cobalt oxide powder. By mixing lithium fluoride, magnesium fluorine can be melted at a temperature lower than its melting point, and a positive electrode active material is formed utilizing this eutectic phenomenon.