公开(公告)号：US20240356067A1

公开(公告)日：2024-10-24

申请号：US18395852

申请日：2023-12-26

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 ,  H01M50/119 ,  H01M50/121 ,  H01M50/122 ,  H01M50/124

CPC classification number: H01M10/0565 ,  H01M4/02 ,  H01M4/13 ,  H01M10/0436 ,  H01M10/052 ,  H01M10/0585 ,  H01M50/119 ,  H01M50/121 ,  H01M50/122 ,  H01M50/124 ,  H01M2300/0085 ,  Y02T10/70

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：US20240356027A1

公开(公告)日：2024-10-24

申请号：US18760368

申请日：2024-07-01

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Masaki YAMAKAJI

IPC: H01M4/58 ,  B60L50/64 ,  B82Y30/00 ,  H01M4/02 ,  H01M4/136 ,  H01M4/1397 ,  H01M10/04 ,  H01M10/0525

CPC classification number: H01M4/5825 ,  B60L50/64 ,  B82Y30/00 ,  H01M4/136 ,  H01M4/1397 ,  H01M10/0436 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2220/20 ,  Y02E60/10 ,  Y02P70/50 ,  Y02T10/70

Abstract: An object is to improve the characteristics of a power storage device such as a charging and discharging rate or a charge and discharge capacity. The grain size of particles of a positive electrode active material is nano-sized so that a surface area per unit mass of the active material is increased. Specifically, the grain size is set to greater than or equal to 10 nm and less than or equal to 100 nm, preferably greater than or equal to 20 nm and less than or equal to 60 nm. Alternatively, the surface area per unit mass is set to 10 m2/g or more, preferably 20 m2/g or more. Further, the crystallinity of the active material is increased by setting an XRD half width to greater than or equal to 0.12° and less than 0.17°, preferably greater than or equal to 0.13° and less than 0.16°.

公开(公告)号：US20240038966A1

公开(公告)日：2024-02-01

申请号：US18376988

申请日：2023-10-05

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Masaki YAMAKAJI ,  Mako MOTOYOSHI ,  Rika YATABE

IPC: H01M4/1393 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/62

CPC classification number: H01M4/1393 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/364 ,  H01M4/625 ,  Y02E60/10

Abstract: A positive electrode for a nonaqueous secondary battery including an active material layer which has sufficient electron conductivity with a low ratio of a conductive additive is provided. A positive electrode for a nonaqueous secondary battery including an active material layer which is highly filled with an active material, id est, including the active material and a low ratio of a conductive additive. The active material layer includes a plurality of particles of an active material with a layered rock salt structure, graphene that is in surface contact with the plurality of particles of the active material, and a binder.

公开(公告)号：US20200373581A1

公开(公告)日：2020-11-26

申请号：US16986372

申请日：2020-08-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Hiroatsu TODORIKI ,  Mikio YUKAWA ,  Yumiko SAITO ,  Masaki YAMAKAJI ,  Rika YATABE ,  Tatsuya IKENUMA

IPC: H01M4/62 ,  H01M4/36 ,  H01M10/052 ,  H01M4/136 ,  H01M4/58 ,  C01B32/23

Abstract: A graphene oxide used as a raw material of a conductive additive for forming an active material layer with high electron conductivity with a small amount of a conductive additive is provided. A positive electrode for a nonaqueous secondary battery using the graphene oxide as a conductive additive is provided. The graphene oxide is used as a raw material of a conductive additive in a positive electrode for a nonaqueous secondary battery and, in the graphene oxide, the atomic ratio of oxygen to carbon is greater than or equal to 0.405.

公开(公告)号：US20200287239A1

公开(公告)日：2020-09-10

申请号：US16881076

申请日：2020-05-22

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaki YAMAKAJI

IPC: H01M10/0562 ,  C07F7/18 ,  H01M10/056 ,  C01B32/194 ,  C01B32/198 ,  C07D301/00 ,  C07D303/40 ,  H01M10/0525

Abstract: To provide a graphene compound having an insulating property and an affinity for lithium ions. To increase the molecular weight of a substituent included in a graphene compound. To provide a graphene compound including a chain group containing an ether bond or an ester bond. To provide a graphene compound including a substituent containing one or more branches. To provide a graphene compound including a substituent including at least one of an ester bond and an amide bond.

公开(公告)号：US20180108944A1

公开(公告)日：2018-04-19

申请号：US15719620

申请日：2017-09-29

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaki YAMAKAJI

IPC: H01M10/0562 ,  C01B32/194 ,  C01B32/198 ,  C07D303/40 ,  C07F7/18 ,  C07D301/00 ,  H01M10/0525

CPC classification number: H01M10/0562 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/194 ,  C01B32/198 ,  C07D301/00 ,  C07D303/40 ,  C07F7/1804 ,  C07F7/188 ,  H01M10/0525 ,  H01M10/056 ,  H01M2300/0068 ,  H01M2300/0091 ,  Y10S977/734 ,  Y10S977/847 ,  Y10S977/948

Abstract: To provide a graphene compound having an insulating property and an affinity for lithium ions. To increase the molecular weight of a substituent included in a graphene compound. To provide a graphene compound including a chain group containing an ether bond or an ester bond. To provide a graphene compound including a substituent containing one or more branches. To provide a graphene compound including a substituent including at least one of an ester bond and an amide bond.

公开(公告)号：US20160204440A1

公开(公告)日：2016-07-14

申请号：US15075387

申请日：2016-03-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Hiroatsu TODORIKI ,  Mikio YUKAWA ,  Yumiko SAITO ,  Masaki YAMAKAJI ,  Rika YATABE ,  Tatsuya IKENUMA

IPC: H01M4/62 ,  C01B31/04 ,  H01M10/052 ,  H01M4/58 ,  H01M4/36

CPC classification number: H01M4/625 ,  C01B32/23 ,  H01M4/136 ,  H01M4/364 ,  H01M4/366 ,  H01M4/5825 ,  H01M4/624 ,  H01M10/052

Abstract: A graphene oxide used as a raw material of a conductive additive for forming an active material layer with high electron conductivity with a small amount of a conductive additive is provided. A positive electrode for a nonaqueous secondary battery using the graphene oxide as a conductive additive is provided. The graphene oxide is used as a raw material of a conductive additive in a positive electrode for a nonaqueous secondary battery and, in the graphene oxide, the weight ratio of oxygen to carbon is greater than or equal to 0.405.

公开(公告)号：US20140057165A1

公开(公告)日：2014-02-27

申请号：US13973524

申请日：2013-08-22

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Masaki YAMAKAJI ,  Takahiro Kawakami ,  Mako Motoyoshi ,  Rika Yatabe

IPC: H01M4/131 ,  H01M4/62 ,  H01M4/1391 ,  H01M4/04

CPC classification number: H01M4/366 ,  H01M4/0404 ,  H01M4/043 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/136 ,  H01M4/1391 ,  H01M4/1397 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/587 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: A positive electrode for a secondary battery which enables both good battery characteristics and electrode strength at a predetermined level, a secondary battery, and a method for fabricating the positive electrode for a secondary battery are provided.The positive electrode for a secondary battery includes a current collector and an active material layer over the current collector. The active material layer includes an active material, graphene, and a binder. A carbon layer is on a surface of the active material. The proportion of the graphene in the active material layer is greater than or equal to 0.1 wt % and less than or equal to 1.0 wt %.

Abstract translation: 提供一种能够实现良好的电池特性和预定电极电极强度的二次电池用正极，二次电池以及二次电池用正极的制造方法。 二次电池用正极在集电体上具有集电体和活性物质层。 活性物质层包括活性物质，石墨烯和粘合剂。 碳层在活性材料的表面上。 活性物质层中的石墨烯的比例大于或等于0.1重量％且小于或等于1.0重量％。

公开(公告)号：US20130084384A1

公开(公告)日：2013-04-04

申请号：US13628223

申请日：2012-09-27

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Masaki YAMAKAJI

IPC: H01M4/04 ,  H01B1/00 ,  H01B1/04 ,  B82Y30/00 ,  B82Y40/00

CPC classification number: H01M4/0404 ,  B82Y30/00 ,  H01B1/04 ,  H01B1/08 ,  H01M4/485 ,  H01M4/505 ,  H01M4/5825 ,  H01M4/623 ,  H01M4/625 ,  H01M2004/021

Abstract: The conductivity of an active material layer provided in an electrode of a secondary battery is sufficiently increased and active material powders in a slurry containing active materials each have a certain size. Secondary particles are manufactured through the following steps: mixing at least active material powders and oxidized conductive material powders to form a slurry; drying the slurry to form a dried substance; grinding the dried substance to form a powder mixture; and reducing the powder mixture. Further, an electrode of a power storage device is manufactured through the following steps: forming a slurry containing at least the secondary particles; applying the slurry to a current collector; and drying the slurry over the current collector.

Abstract translation: 提供在二次电池的电极中的活性材料层的导电性充分增加，并且含有活性物质的浆料中的活性物质粉末各自具有一定的尺寸。 通过以下步骤制造二次颗粒：将至少活性物质粉末和氧化的导电材料粉末混合以形成浆料; 干燥浆料以形成干物质; 研磨干燥物质以形成粉末混合物; 并减少粉末混合物。 此外，通过以下步骤制造蓄电装置的电极：形成至少包含二次粒子的浆料; 将浆料施加到集电器; 并在集电器上干燥浆料。