公开(公告)号：US20250062349A1

公开(公告)日：2025-02-20

申请号：US18935745

申请日：2024-11-04

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Ryota TAJIMA ,  Yumiko YONEDA ,  Yohei MOMMA ,  Shunpei YAMAZAKI

IPC: H01M4/583 ,  H01M4/02 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0562

Abstract: Use of silicon as a negative electrode active material particle causes a problem of expansion and contraction of the negative electrode active material particle due to charging and discharging. A negative electrode active material particle or a plurality of negative electrode active material particles are bound or fixed using a graphene compound to inhibit expansion and contraction of the negative electrode active material particle due to charging and discharging. In an all-solid-state secondary battery, an interface between a solid electrolyte and a negative electrode or an interface between the solid electrolyte and a positive electrode has the highest resistance. In order to reduce the interface resistance, at least the negative electrode active material particle is surrounded by a graphene compound to increase the conductivity. Alternatively, a positive electrode active material particle is surrounded by a graphene compound to increase the conductivity. Carrier ions, e.g., lithium ions, pass through a graphene compound, and thus the graphene compound does not hinder the transfer of lithium ions between the positive electrode and the negative electrode in charging or discharging.

公开(公告)号：US20240283023A1

公开(公告)日：2024-08-22

申请号：US18557127

申请日：2022-04-15

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Yumiko YONEDA ,  Yoshiharu ASADA ,  Tetsuya KAKEHATA

IPC: H01M10/0567 ,  H01G11/46 ,  H01G11/50 ,  H01G11/62 ,  H01M4/02 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  H01G11/46 ,  H01G11/50 ,  H01G11/62 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028 ,  H01M2300/0025

Abstract: A lithium-ion secondary battery with a high capacity and excellent charge and discharge cycle performance is provided. A secondary battery with a high capacity is provided. A secondary battery whose shape hardly changes in a vacuum is provided. A bendable secondary battery is provided. The secondary battery contains a positive electrode active material and an electrolyte; the positive electrode active material is lithium cobalt oxide to which magnesium is added; magnesium has a gradient in which a concentration increases from an inner portion toward a surface of the positive electrode active material; the electrolyte contains an imidazolium salt; and a temperature range where the secondary battery can operate is higher than or equal to −20° C. and lower than or equal to 100° C.

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：US20230246198A1

公开(公告)日：2023-08-03

申请号：US17766336

申请日：2020-09-29

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kaori OGITA ,  Hiroshi KADOMA ,  Tomoya HIROSE ,  Yumiko YONEDA ,  Yuji IWAKI ,  Tatsuyoshi TAKAHASHI ,  Shunpei YAMAZAKI ,  Mayumi MIKAMI ,  Kazuki TANEMURA

IPC: H01M4/62 ,  H01M4/525 ,  H01M4/131 ,  H01M10/0525

CPC classification number: H01M4/628 ,  H01M4/525 ,  H01M4/131 ,  H01M10/0525 ,  H01M2004/028

Abstract: A positive electrode for a secondary battery having excellent cycle performance is provided. The positive electrode for a secondary battery includes a positive electrode current collector layer, a base film, a positive electrode active material layer, and a cap layer; the base film contains titanium nitride; the positive electrode active material layer contains lithium cobalt oxide; and the cap layer contains titanium oxide. The use of titanium nitride for the base film can inhibit oxidation of the positive electrode current collector and diffusion of metal atoms while ensuring an adequate conductivity. The use of titanium oxide for the cap layer can inhibit a side reaction between the positive electrode active material layer and an electrolyte and collapse of a crystal structure of the electrode active material, improving the cycle performance.

公开(公告)号：US20230074610A1

公开(公告)日：2023-03-09

申请号：US17904395

申请日：2021-03-02

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teruaki OCHIAI ,  Yumiko YONEDA ,  Kazutaka KURIKI ,  Shunpei YAMAZAKI

IPC: H01M4/62 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/38 ,  B60L50/64

Abstract: An active material layer that has a high filling rate and a higher density and is formed using a small amount of conductive additive is provided. A positive electrode active material layer includes a first carbon material and a second carbon material, which is more likely to aggregate than the first carbon material, and mixing is performed such that the weight of the second carbon material is more than or equal to 1.5 times and less than or equal to 20 times that of the first carbon material, thereby preventing the aggregation of the second carbon material and the aggregation of the first carbon material and reducing the proportion of the aggregated portions.

公开(公告)号：US20220416239A1

公开(公告)日：2022-12-29

申请号：US17780049

申请日：2020-11-26

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Yumiko YONEDA ,  Mayumi MIKAMI ,  Hiroshi KADOMA ,  Kunihiko SUZUKI ,  Shunpei YAMAZAKI

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/583 ,  H01M10/0567

Abstract: A secondary battery that can withstand at least high temperature is achieved by designing the structure of the secondary battery. The secondary battery uses: a positive electrode active material obtained by a formation method including a first step of forming a first mixture by pulverizing magnesium fluoride, lithium fluoride, a nickel source, and an aluminum source and then mixing the pulverized materials with powder of lithium cobalt oxide, and a second step of forming a second mixture by heating the first mixture at a temperature lower than an upper temperature limit of the lithium cobalt oxide; and an electrolyte solution to which LiBOB is added.

公开(公告)号：US20220216524A1

公开(公告)日：2022-07-07

申请号：US17606839

申请日：2020-04-17

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

IPC: H01M10/0585 ,  H01M10/0525 ,  H01M10/0562 ,  H01M4/48 ,  H01M4/13

Abstract: A solid-state secondary battery with high safety is provided. The solid-state secondary battery includes a first film that has a function of releasing and accumulating a lithium ion and is over a negative electrode current collector layer, a second film that has a function of transporting a lithium ion and is over the first film, a third film that has a function of releasing and accumulating a lithium ion and is over the second film, and a positive electrode current collector layer over the third film. The total thickness of the first to third films is the same before and after charging.

公开(公告)号：US20210408593A1

公开(公告)日：2021-12-30

申请号：US17468766

申请日：2021-09-08

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yumiko YONEDA ,  Masaki YAMAKAJI ,  Ryota TAJIMA ,  Masaaki HIROKI

IPC: H01M10/0565 ,  H01M4/02 ,  H01M4/13 ,  H01M10/04 ,  H01M10/052 ,  H01M10/0585

Abstract: A gel electrolyte and a separator are provided between the positive electrode current collector and the negative electrode current collector. The plurality of positive electrode current collectors and the plurality of negative electrode current collectors are stacked such that surfaces of negative electrodes with which active material layers are not coated or surfaces of positive electrodes with which active material layers are not coated are in contact with each other.

公开(公告)号：US20150132649A1

公开(公告)日：2015-05-14

申请号：US14534275

申请日：2014-11-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kiyofumi OGINO ,  Yumiko YONEDA ,  Rika YATABE ,  Nobuhiro INOUE

IPC: H01M4/38 ,  H01M4/62

CPC classification number: H01M4/386 ,  H01M4/134 ,  H01M4/38 ,  H01M4/625

Abstract: A power storage device having high capacitance is provided. A power storage device with excellent cycle characteristics is provided. A power storage device with high charge and discharge efficiency is provided. A power storage device including a negative electrode with low resistance is provided. A negative electrode for the power storage device includes a current collector and an active material layer including a plurality of active material particles over the current collector. The active material particle is silicon, and the size of the silicon particle is greater than or equal to 0.001 μm and less than or equal to 7 μm.

Abstract translation: 提供具有高电容的蓄电装置。 提供了具有优异循环特性的蓄电装置。 提供具有高充放电效率的蓄电装置。 提供了包括具有低电阻的负极的蓄电装置。 蓄电装置的负极包括集电体和在集电体上包含多个活性物质粒子的活性物质层。 活性物质颗粒是硅，硅颗粒的尺寸大于或等于0.001μm且小于或等于7μm。

公开(公告)号：US20250167359A1

公开(公告)日：2025-05-22

申请号：US18838429

申请日：2023-02-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yosiharu ASADA ,  Kazutaka KURIKI ,  Yumiko YONEDA ,  Harushi ITO

IPC: H01M50/178 ,  H01M10/0585 ,  H01M50/105 ,  H01M50/121

Abstract: A secondary battery that can inhibit deterioration of an electrode is provided. A flexible secondary battery is provided. The secondary battery includes a positive electrode, a negative electrode, a separator, a first spacer, a second spacer, a positive electrode lead, a negative electrode lead, and an exterior body. The positive electrode includes a first portion coated with a positive electrode active material and a second portion where a positive electrode current collector is exposed. The negative electrode includes a third portion coated with a negative electrode active material and a fourth portion where a negative electrode current collector is exposed. The first portion, the third portion, and the separator overlap with each other in a stacked portion. The positive electrode lead is connected to the second portion in a position overlapping with the stacked portion. The negative electrode lead is connected to the fourth portion in a position overlapping with the stacked portion. The first spacer is in contact with the exterior body in a region surrounded by one end portion of the stacked portion, the positive electrode lead, and the negative electrode lead. The second spacer includes a region interposed between the stacked portion and the second portion, a region interposed between the stacked portion and the fourth portion, and a region connected to the first spacer.