公开(公告)号：US20160218367A1

公开(公告)日：2016-07-28

申请号：US15091770

申请日：2016-04-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Masaki YAMAKAJI

IPC: H01M4/58 ,  H01M10/04 ,  B60L11/18 ,  H01M4/136 ,  H01M10/0525

CPC classification number: H01M4/5825 ,  B60L11/18 ,  B82Y30/00 ,  H01M4/136 ,  H01M4/1397 ,  H01M10/0436 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2220/20 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

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°.

Abstract translation: 目的在于提高蓄电装置的特性，例如充放电率或充放电容量。 正极活性物质的粒子的粒径为纳米尺寸，使得每单位质量的活性物质的表面积增加。 具体地，将晶粒尺寸设定为大于或等于10nm且小于或等于100nm，优选大于或等于20nm且小于或等于60nm。 或者，每单位质量的表面积设定为10m 2 / g以上，优选为20m 2 / g以上。 此外，通过将XRD半值宽度设定为大于或等于0.12°并小于0.17°，优选大于或等于0.13°且小于0.16°，来提高活性材料的结晶度。

公开(公告)号：US20130164619A1

公开(公告)日：2013-06-27

申请号：US13724427

申请日：2012-12-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaki YAMAKAJI ,  Kuniharu NOMOTO

IPC: H01M4/62 ,  H01M4/134

CPC classification number: H01M4/625 ,  H01M4/0404 ,  H01M4/134 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/5825 ,  H01M4/622

Abstract: The positive electrode active material layer includes a plurality of particles of a positive electrode active material and a reaction mixture where reduced graphene oxide is bonded to a polymer having a functional group as a side chain. The reduced graphene oxide has a sheet-like shape and high conductivity and thus functions as a conductive additive by being in contact with the plurality of particles of the positive electrode active material. The reaction mixture serves as an excellent binder since the reduced graphene oxide is bonded to the polymer. Therefore, even a small amount of the reaction mixture where the reduced graphene oxide is covalently bonded to the polymer excellently serves as a conductive additive and a binder.

Abstract translation: 正极活性物质层包含多个正极活性物质的粒子和氧化还原性氧化物与作为侧链的官能团的聚合物结合的反应混合物。 还原型石墨烯氧化物具有片状形状和高导电性，因此通过与正极活性物质的多个颗粒接触而用作导电添加剂。 反应混合物用作优异的粘合剂，因为还原的氧化石墨烯结合到聚合物上。 因此，即使少量的还原型石墨烯氧化物与聚合物共价键合的反应混合物也极好地用作导电添加剂和粘合剂。

公开(公告)号：US20230041532A1

公开(公告)日：2023-02-09

申请号：US17969422

申请日：2022-10-19

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

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：US20220059824A1

公开(公告)日：2022-02-24

申请号：US17460483

申请日：2021-08-30

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/04 ,  H01M4/62 ,  H01M4/1391 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M4/58 ,  H01M10/0525

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 %.

公开(公告)号：US20190319268A1

公开(公告)日：2019-10-17

申请号：US16454116

申请日：2019-06-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yumiko YONEDA ,  Teppei OGUNI ,  Takuya MIWA ,  Masaki YAMAKAJI ,  Ayae TSURUTA

IPC: H01M4/587 ,  C01B32/23 ,  C01B32/225 ,  H01M10/0587 ,  H01M10/0525 ,  H01M4/1393 ,  H01M2/16 ,  H01M4/62 ,  H01M4/04 ,  H01M4/36 ,  H01M2/14

Abstract: To provide a manufacturing method of graphene oxide that allows mass production through a relatively simple process, at low costs, and with safety and efficiency. A hydrogen peroxide solution, sulfuric acid, and flake graphite are put in a reaction container, and the mixture is stirred to obtain expansion graphite. The synthesized expansion graphite is washed not with pure water but with a saturated aqueous solution of magnesium sulfate (MgSO4) or an organic solvent, whereby a large amount of sulfuric acid is contained between graphite layers. The expansion graphite is subjected to heat treatment or microwave irradiation to form expanded graphite, and a graphite layer is peeled by ultrasonic treatment and then oxidized to form a graphene compound.

公开(公告)号：US20180076482A1

公开(公告)日：2018-03-15

申请号：US15818814

申请日：2017-11-21

Applicant: Semiconductor Energy Laboratory Co., Ltd.

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

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

CPC classification number: H01M10/0565 ,  H01M2/0275 ,  H01M4/02 ,  H01M4/13 ,  H01M10/0436 ,  H01M10/052 ,  H01M10/0585 ,  H01M2300/0085 ,  Y02T10/7011

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：US20170222265A1

公开(公告)日：2017-08-03

申请号：US15407283

申请日：2017-01-17

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Masaki YAMAKAJI ,  Jun ISHIKAWA ,  Kazuhei NARITA

IPC: H01M10/0568 ,  H01M4/36 ,  H01M4/62 ,  H01M4/38 ,  H01M10/0525 ,  H01M10/054

CPC classification number: H01M10/0568 ,  H01M4/364 ,  H01M4/366 ,  H01M4/38 ,  H01M4/386 ,  H01M4/587 ,  H01M4/625 ,  H01M10/0525 ,  H01M10/054 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2010/4278 ,  H01M2220/30 ,  H01M2300/0025 ,  Y02E60/122 ,  Y02T10/7011

Abstract: A storage battery includes positive and negative electrodes and an electrolytic solution. The negative electrode includes a first element and carbon. The first element is any of silicon, tin, gallium, aluminum, germanium, lead, antimony, bismuth, silver, zinc, cadmium, and indium. The negative electrode includes an active material and a first layer in contact with a surface of the active material. The first layer has a thickness of 10 nm to 1000 nm inclusive. The electrolytic solution contains first and second cations. The first cation is one or more of a lithium ion, a sodium ion, a calcium ion, and a magnesium ion. The second cation is an imidazolium cation or a tertiary sulfonium cation.

公开(公告)号：US20170054141A1

公开(公告)日：2017-02-23

申请号：US15342860

申请日：2016-11-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kuniharu NOMOTO ,  Takuya MIWA ,  Masaki YAMAKAJI ,  Takahiro KAWAKAMI

IPC: H01M4/1397 ,  H01M4/62 ,  H01M4/36 ,  H01M4/58 ,  H01M4/04 ,  H01M4/38

CPC classification number: H01M4/1397 ,  H01M4/0433 ,  H01M4/0471 ,  H01M4/136 ,  H01M4/366 ,  H01M4/38 ,  H01M4/5825 ,  H01M4/625 ,  H01M2004/028 ,  Y02E60/122 ,  Y02P70/54

Abstract: An energy storage device having high capacity per weight or volume and a positive electrode active material for the energy storage device are manufactured. A surface of a main material included in the positive electrode active material for the energy storage device is coated with two-dimensional carbon. The main material included in the positive electrode active material is coated with a highly conductive material which has a structure expanding two-dimensionally and whose thickness is ignorable, whereby the amount of carbon coating can be reduced and an energy storage device having capacity close to theoretical capacity can be obtained even when a conduction auxiliary agent is not used or the amount of the conduction auxiliary agent is extremely small. Accordingly, the amount of carbon coating in a positive electrode and the volume of the conduction auxiliary agent can be reduced; consequently, the volume of the positive electrode can be reduced.

Abstract translation: 制造具有高容量/重量或体积的储能装置和用于储能装置的正极活性物质。 包含在能量储存装置的正极活性物质中的主要材料的表面涂覆有二维碳。 包含在正极活性物质中的主要材料涂覆有具有二维膨胀并且其厚度可忽略的结构的高导电性材料，由此可以减少碳涂层的量，并且具有接近理论值的能量存储装置 即使不使用导电助剂或导电助剂的量极少，也可以获得容量。 因此，可以减少正极中的碳涂覆量和导电助剂的体积; 因此，可以减小正极的体积。

公开(公告)号：US20160190545A1

公开(公告)日：2016-06-30

申请号：US14976504

申请日：2015-12-21

Applicant: Semiconductor Energy Laboratory Co., LTD.

Inventor： Junpei MOMO ,  Yohei MOMMA ,  Masaki YAMAKAJI ,  Teppei OGUNI

IPC: H01M4/04 ,  H01M10/058 ,  C25D3/42 ,  H01M10/04 ,  H01M4/38 ,  H01M10/052

CPC classification number: H01M4/0452 ,  C25D11/00 ,  C25D21/02 ,  C25D21/10 ,  H01M4/0445 ,  H01M4/0471 ,  H01M10/049 ,  H01M10/052 ,  H01M10/058 ,  H01M2220/30

Abstract: To provide a method of manufacturing a lithium-ion secondary battery having stable charge characteristics and lifetime characteristics. A positive electrode is subjected to an electrochemical reaction in a large amount of electrolytic solution in advance before a secondary battery is completed. In this manner, the positive electrode can have stability. The use of the positive electrode enables manufacture of a highly reliable secondary battery. Similarly, a negative electrode is subjected to an electrochemical reaction in a large amount of electrolytic solution in advance. The use of the negative electrode enables manufacture of a highly reliable secondary battery.

Abstract translation: 提供具有稳定的电荷特性和寿命特性的锂离子二次电池的制造方法。 在二次电池完成之前，正电极预先在大量的电解液中进行电化学反应。 以这种方式，正极可以具有稳定性。 使用正极能够制造高可靠性的二次电池。 类似地，负极预先在大量的电解液中进行电化学反应。 使用负极能够制造高可靠性的二次电池。

公开(公告)号：US20240347696A1

公开(公告)日：2024-10-17

申请号：US18753138

申请日：2024-06-25

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.