公开(公告)号：US20210210794A1

公开(公告)日：2021-07-08

申请号：US17116678

申请日：2020-12-09

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaki YAMAKAJI ,  Junpei MOMO ,  Ryota TAJIMA ,  Takahiro KASAHARA

IPC: H01M10/42 ,  H01M10/48 ,  H01M50/116 ,  H01M50/124

Abstract: To provide a lithium-ion storage battery or electronic device that is flexible and highly safe. One embodiment of the present invention is a flexible storage battery including a positive electrode, a negative electrode, a separator between the positive electrode and the negative electrode, an exterior body that surrounds the positive electrode, the negative electrode, and the separator, and a wiring provided along the exterior body. At least part of the wiring is more easily breakable by deformation than the exterior body. The wiring is more vulnerable to deformation than the exterior body and thus damaged earlier than the exterior body. Damage to the wiring is detected and an alert is sent to a user; thus, the use of the storage battery can be stopped before the exterior body is damaged.

公开(公告)号：US20210175507A1

公开(公告)日：2021-06-10

申请号：US17178286

申请日：2021-02-18

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaki YAMAKAJI ,  Kuniharu NOMOTO

IPC: H01M4/62 ,  H01M4/134 ,  H01M4/136 ,  H01M4/1397

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.

公开(公告)号：US20190157676A1

公开(公告)日：2019-05-23

申请号：US16261618

申请日：2019-01-30

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Masaki YAMAKAJI

IPC: H01M4/58 ,  H01M10/04 ,  B82Y30/00 ,  H01M4/136 ,  H01M4/1397 ,  H01M10/0525 ,  B60L50/50

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 0.12º and less than 0.17º, preferably greater than or equal to 0.13º and less than 0.16º.

公开(公告)号：US20170324082A1

公开(公告)日：2017-11-09

申请号：US15659665

申请日：2017-07-26

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

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

CPC classification number: H01M4/1393 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/364 ,  H01M4/625 ,  Y02E60/122

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：US20170187040A1

公开(公告)日：2017-06-29

申请号：US15381152

申请日：2016-12-16

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

IPC: H01M4/587 ,  H01M2/16 ,  H01M10/0587 ,  H01M4/1393 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/36 ,  H01M2/14

CPC classification number: H01M4/587 ,  C01B32/225 ,  C01B32/23 ,  C01P2006/40 ,  H01M2/145 ,  H01M2/1626 ,  H01M2/1653 ,  H01M2/1673 ,  H01M4/0404 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/364 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2004/027 ,  H01M2220/20

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：US20160351903A1

公开(公告)日：2016-12-01

申请号：US15232977

申请日：2016-08-10

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaki YAMAKAJI

IPC: H01M4/525 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/505

CPC classification number: H01M4/525 ,  H01M4/0402 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/366 ,  H01M4/485 ,  H01M4/505 ,  H01M4/5825 ,  H01M4/625 ,  H01M10/0525 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: An object is to provide an electrode material with high electrical conductivity and a power storage device using the electrode material. An object is to provide an electrode material with high capacity and a power storage device using the electrode material. Provided is a particulate electrode material including a core containing a compound represented by a general formula Li2MSiO4 (in the formula, M represents at least one kind of an element selected from Fe, Co, Mn, and Ni) as a main component, and a covering layer containing a compound represented by a general formula LiMPO4 as a main component and covering the core. Further, a solid solution material is provided between the core and the covering layer. With such a structure, an electrode material with high electrical conductivity can be obtained. Further, with such an electrode material, a power storage device with high discharge capacity can be obtained.

Abstract translation: 目的在于提供具有高导电性的电极材料和使用该电极材料的功率存储装置。 目的是提供一种具有高容量的电极材料和使用该电极材料的蓄电装置。 本发明提供一种颗粒电极材料，其包含含有由通式Li 2 MSiO 4表示的化合物（式中M表示选自Fe，Co，Mn和Ni中的至少一种元素）作为主要成分的核， 包含由通式LiMPO4表示的化合物作为主要成分并覆盖该芯的覆盖层。 此外，在芯和覆盖层之间提供固溶体材料。 通过这样的结构，可以获得具有高导电性的电极材料。 此外，通过这样的电极材料，可以获得具有高放电容量的蓄电装置。

公开(公告)号：US20160308200A1

公开(公告)日：2016-10-20

申请号：US15193478

申请日：2016-06-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/136 ,  H01M4/58 ,  H01M4/62 ,  H01M10/0525

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：US20160204437A1

公开(公告)日：2016-07-14

申请号：US14988159

申请日：2016-01-05

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Ryota Tajima ,  Junpei MOMO ,  Masaki YAMAKAJI

IPC: H01M4/62 ,  H01M2/02 ,  H01M10/04

CPC classification number: H01M4/62 ,  H01M2/02 ,  H01M4/13 ,  H01M10/0431

Abstract: A flexible power storage device or a power storage device of which the capacity and cycle characteristics do not easily deteriorate even when the power storage device is curved is provided. An electrode in which an active material layer, a current collector, and a friction layer are stacked in this order is provided. Furthermore, a power storage device that includes the electrode as at least one of a positive electrode and a negative electrode is provided.

Abstract translation: 提供即使在蓄电装置弯曲时容量和循环特性也不容易劣化的柔性蓄电装置或蓄电装置。 提供其中依次层叠活性物质层，集电体和摩擦层的电极。 此外，提供了包括作为正极和负极中的至少一个的电极的蓄电装置。

公开(公告)号：US20160156071A1

公开(公告)日：2016-06-02

申请号：US14943070

申请日：2015-11-17

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaki YAMAKAJI ,  Junpei MOMO ,  Ryota TAJIMA ,  Takahiro KASAHARA

IPC: H01M10/42 ,  H01M2/02 ,  H01M10/0525 ,  H01M10/48

CPC classification number: H01M10/425 ,  H01M2/0275 ,  H01M2/0287 ,  H01M10/0525 ,  H01M10/48 ,  H01M10/488 ,  H01M2220/30 ,  Y02E60/122

Abstract: To provide a lithium-ion storage battery or electronic device that is flexible and highly safe. One embodiment of the present invention is a flexible storage battery including a positive electrode, a negative electrode, a separator between the positive electrode and the negative electrode, an exterior body that surrounds the positive electrode, the negative electrode, and the separator, and a wiring provided along the exterior body. At least part of the wiring is more easily breakable by deformation than the exterior body. The wiring is more vulnerable to deformation than the exterior body and thus damaged earlier than the exterior body. Damage to the wiring is detected and an alert is sent to a user; thus, the use of the storage battery can be stopped before the exterior body is damaged.

Abstract translation: 提供灵活高度安全的锂离子蓄电池或电子设备。 本发明的一个实施例是一种柔性蓄电池，其包括正极，负极，正极和负极之间的隔板，围绕正极，负极和隔板的外部主体，以及 沿着外部主体设置的接线。 布线的至少一部分通过变形比外部体更容易破裂。 布线比外部主体更容易变形，因此比外部体更早地损坏。 检测到接线损坏，向用户发送警报; 因此，可以在外部体损坏之前停止使用蓄电池。

公开(公告)号：US20160087305A1

公开(公告)日：2016-03-24

申请号：US14854349

申请日：2015-09-15

Applicant: Semiconductor Energy Laboratory Co., Ltd.

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

IPC: H01M10/0565 ,  H01M2/02

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.

Abstract translation: 在正极集电体和负极集电体之间设置凝胶电解质和隔膜。 堆叠多个正极集电体和多个负极集电体，使得不涂覆有活性物质层的负极的表面或不涂覆活性物质层的正极的表面彼此接触 。