公开(公告)号：US20190207203A1

公开(公告)日：2019-07-04

申请号：US16256305

申请日：2019-01-24

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kai KIMURA ,  Tatsuya IKENUMA ,  Nobuhiro INOUE ,  Teppei OGUNI

IPC: H01M4/133 ,  H01M4/38 ,  H01M4/587 ,  H01M4/62 ,  H01M4/134 ,  H01M10/052 ,  H01M10/0525

CPC classification number: H01M4/133 ,  H01M4/134 ,  H01M4/366 ,  H01M4/386 ,  H01M4/587 ,  H01M4/622 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2220/20 ,  Y02E60/122

Abstract: To provide a power storage device with a high capacity. To provide a power storage device with a high energy density. To provide a highly reliable power storage device. To provide a long-life power storage device. To provide an electrode with a high capacity. To provide an electrode with a high energy density. To provide a highly reliable electrode. To provide a long-life electrode. The power storage device includes a first electrode and a second electrode. The first electrode includes a first current collector and a first active material layer. The first active material layer includes a first active material and a first binder. The first active material is graphite. A separation strength F of the first electrode that is measured when the first active material layer is separated from the first current collector after the first electrode is immersed in a solution at a temperature higher than or equal to 20° C. and lower than or equal to 70° C. for longer than or equal to three hours is higher than or equal to 0.05 N/cm and lower than or equal to 5 N/cm per unit width of a sample that is separated.

公开(公告)号：US20180065848A1

公开(公告)日：2018-03-08

申请号：US15810953

申请日：2017-11-13

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teppei OGUNI ,  Takeshi OSADA ,  Toshihiko TAKEUCHI

IPC: B82Y30/00 ,  C25D13/22 ,  H01M4/04 ,  H01M4/13 ,  H01M4/133 ,  H01M4/134 ,  H01M4/139 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/36 ,  H01M4/587 ,  H01M10/0525

CPC classification number: B82Y30/00 ,  C25D13/02 ,  C25D13/22 ,  H01M4/0416 ,  H01M4/0452 ,  H01M4/13 ,  H01M4/133 ,  H01M4/134 ,  H01M4/139 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/366 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/027

Abstract: To form graphene to a practically even thickness on an object having an uneven surface or a complex surface, in particular, an object having a surface with a three-dimensional structure due to complex unevenness, or an object having a curved surface. The object and an electrode are immersed in a graphene oxide solution, and voltage is applied between the object and the electrode. At this time, the object serves as an anode. Graphene oxide is attracted to the anode because of being negatively charged, and deposited on the surface of the object to have a practically even thickness. A portion where graphene oxide is deposited is unlikely coated with another graphene oxide. Thus, deposited graphene oxide is reduced to graphene, whereby graphene can be formed to have a practically even thickness on an object having surface with complex unevenness.

公开(公告)号：US20180019462A1

公开(公告)日：2018-01-18

申请号：US15646626

申请日：2017-07-11

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Hiroshi KADOMA ,  Teppei OGUNI ,  Satoshi SEO

IPC: H01M4/1393 ,  H01M4/04 ,  H01M10/052 ,  H01M2/16 ,  H01M4/60 ,  H01M4/62 ,  H01M4/1395 ,  H01M4/02

CPC classification number: H01M4/1393 ,  C01B32/194 ,  H01M2/1686 ,  H01M4/0471 ,  H01M4/1395 ,  H01M4/60 ,  H01M4/622 ,  H01M10/052 ,  H01M10/054 ,  H01M10/0562 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/30 ,  H01M2300/0065 ,  H01M2300/0068

Abstract: A material that can be used in a wide temperature range and a manufacturing method thereof are provided. A graphene compound has a substituted or unsubstituted chain group. The chain group has one or more ester groups or carboxyl groups and contains a Si atom. The chain group is bonded to a graphene layer through the Si atom. A method for forming a graphene compound includes a step of stirring graphene oxide and a Lewis base and a step of mixing a silicon compound having one or more ester groups or carboxyl groups into the mixed solution and stirring the obtained mixed solution. The Lewis base is butylamine, pentylamine, hexylamine, diethylamine, dipropylamine, dibutylamine, triethylamine, tripropylamine, or pyridine.

公开(公告)号：US20180005761A1

公开(公告)日：2018-01-04

申请号：US15685726

申请日：2017-08-24

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Ryota TAJIMA ,  Tamae MORIWAKA ,  Junpei MOMO ,  Teppei OGUNI ,  Kai KIMURA ,  Kazutaka KURIKI ,  Shunpei YAMAZAKI

IPC: H01G9/042 ,  H01G11/26 ,  H01G11/50 ,  H01G11/06 ,  H01M4/133 ,  H01M4/02 ,  H01M4/134 ,  H01M4/36 ,  H01M10/0525

CPC classification number: H01G9/042 ,  H01G11/06 ,  H01G11/26 ,  H01G11/50 ,  H01M4/02 ,  H01M4/133 ,  H01M4/134 ,  H01M4/366 ,  H01M10/0525 ,  Y02E60/122 ,  Y02E60/13

Abstract: To improve the reliability of a power storage device. A granular active material including carbon is used, and a net-like structure is formed on part of a surface of the granular active material. In the net-like structure, a carbon atom included in the granular active material is bonded to a silicon atom or a metal atom through an oxygen atom. Formation of the net-like structure suppresses reductive decomposition of an electrolyte solution, leading to a reduction in irreversible capacity. A power storage device using the above active material has high cycle performance and high reliability.

公开(公告)号：US20170141428A1

公开(公告)日：2017-05-18

申请号：US15346932

申请日：2016-11-09

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Ai NAKAGAWA ,  Teppei OGUNI ,  Kai KIMURA ,  Rika YATABE

IPC: H01M10/0525 ,  H01M4/36 ,  H01M4/66 ,  H01M10/04 ,  H01M4/133 ,  H01M10/058 ,  H01M4/136 ,  H01M4/58 ,  H01M10/0567 ,  H01M4/587

CPC classification number: H01M10/0525 ,  G01R31/36 ,  H01M4/133 ,  H01M4/136 ,  H01M4/366 ,  H01M4/5825 ,  H01M4/587 ,  H01M4/62 ,  H01M4/626 ,  H01M4/661 ,  H01M10/0422 ,  H01M10/0463 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/058 ,  H01M10/425 ,  H01M2010/4271 ,  H01M2220/30 ,  H01M2300/0025 ,  H01M2300/0037 ,  H02J7/0014

Abstract: A lithium-ion secondary battery with a high capacity retention rate is provided. In addition, a fabricating method of a lithium-ion secondary battery with a high capacity retention rate is provided. The lithium-ion secondary battery includes a positive electrode, a negative electrode, and an electrolyte solution. The negative electrode includes a negative electrode active material layer. The electrolyte solution includes at least one of lithium bis(trifluoromethanesulfonyl)amide (LiTFSA) and lithium bis(fluorosulfonyl)amide (LiFSA). The electrolyte solution includes vinylene carbonate (VC). A coating film including lithium oxide is on a surface of the negative electrode active material layer. A fabricating method of a lithium-ion secondary battery includes a first step of enclosing a positive electrode, a negative electrode, and an electrolyte solution in an exterior body, and a second step of annealing the exterior body enclosing the positive electrode, the negative electrode, and the electrolyte solution for 24 hours or longer after the first step. The annealing in the second step is performed at a temperature higher than or equal to 80° C. and lower than or equal to 100° C.

公开(公告)号：US20160118644A1

公开(公告)日：2016-04-28

申请号：US14884350

申请日：2015-10-15

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Teppei OGUNI ,  Ai NAKAGAWA

IPC: H01M4/133 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0587 ,  H01M10/0567 ,  H01M10/0585 ,  H01M2/16 ,  H01M10/42 ,  H01M4/587 ,  H01M10/0568

CPC classification number: H01M4/133 ,  H01M2/1653 ,  H01M2/30 ,  H01M4/0471 ,  H01M4/139 ,  H01M4/1393 ,  H01M4/366 ,  H01M4/587 ,  H01M4/62 ,  H01M10/049 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/058 ,  H01M10/0585 ,  H01M10/0587 ,  H01M10/425 ,  H01M10/46 ,  H01M2004/027 ,  H01M2220/20 ,  H01M2220/30 ,  H01M2300/0037 ,  H02J5/005 ,  H02J7/025 ,  H02J50/10 ,  H04B5/0031 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011

Abstract: A lithium-ion storage battery with a high capacity retention rate is provided. A lithium-ion storage battery with a longer lifetime is provided. A method for fabricating a lithium-ion storage battery with a high capacity retention rate is provided. A lithium-ion storage battery includes a positive electrode, a negative electrode, and an electrolyte solution. A coating film which includes lithium oxide is provided over the surface of the negative electrode. The electrolyte solution may include LiTFSA or LiFSA. The method for fabricating a lithium-ion storage battery includes a first step of enclosing a positive electrode, a negative electrode, and an electrolyte solution in an exterior body and a second step of keeping the exterior body including the positive electrode, the negative electrode, and the electrolyte solution at temperature higher than or equal to 70 degrees Celsius for longer than or equal to 24 hours after the first step.

Abstract translation: 提供了具有高容量保持率的锂离子蓄电池。 提供寿命更长的锂离子蓄电池。 提供了一种制造具有高容量保持率的锂离子蓄电池的方法。 锂离子蓄电池包括正极，负极和电解质溶液。 在负极的表面上设置有包含氧化锂的涂膜。 电解质溶液可以包括LiTFSA或LiFSA。 锂离子蓄电池的制造方法包括将正极，负极和电解质溶液包封在外部本体中的第一工序，以及保持包括正极，负极等的外部主体的第二工序， 和电解质溶液的温度高于或等于70摄氏度，长于或等于第一步后24小时。

公开(公告)号：US20150099161A1

公开(公告)日：2015-04-09

申请号：US14490697

申请日：2014-09-19

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Aya HITOTSUYANAGI ,  Teppei OGUNI ,  Takuya MIWA ,  Hiroyuki MIYAKE

IPC: H01M10/04 ,  H01M4/485 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/62 ,  H01M4/58 ,  H01M4/583

CPC classification number: H01M10/0525 ,  H01M4/131 ,  H01M4/133 ,  H01M4/134 ,  H01M4/136 ,  H01M4/386 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/587 ,  H01M4/622 ,  H01M4/623 ,  H01M4/624 ,  H01M10/0583 ,  H01M10/0585 ,  H01M10/0587 ,  H01M10/425 ,  H01M2220/10 ,  H01M2220/20 ,  H01M2220/30 ,  Y02E60/122

Abstract: To achieve a power storage unit that can be repeatedly bent without a large decrease in charge and discharge capacity. In the flexible power storage unit, the content of a binder in an active material layer containing an active material is greater than or equal to 1 wt % and less than or equal to 10 wt %, preferably greater than or equal to 2 wt % and less than or equal to 8 wt %, and more preferably greater than or equal to 3 wt % and less than or equal to 5 wt %.

Abstract translation: 实现能够反复弯曲的蓄电单元，而不会大幅度降低充放电能力。 在柔性蓄电单元中，含有活性物质的活性物质层中的粘合剂含量为1重量％以上且10重量％以下，优选2重量％以下，优选2重量％以下， 小于或等于8重量％，更优选大于或等于3重量％且小于或等于5重量％。

公开(公告)号：US20140295261A1

公开(公告)日：2014-10-02

申请号：US14220354

申请日：2014-03-20

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Hiroyuki MIYAKE ,  Teppei OGUNI ,  Tatsuya TAKAHASHI ,  Takuya MIWA ,  Aya HITOTSUYANAGI

IPC: H01M10/0566 ,  H01M4/587 ,  H01M10/052

CPC classification number: H01M10/0566 ,  H01M4/5825 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2300/0037

Abstract: An object is to provide an electrochemical device in which lithium deposition and reduction in battery capacity can be inhibited even when the concentration of a lithium salt in an electrolytic solution is lower than 1.0 M. Lithium deposition can be inhibited and lithium whiskers can be dissolved by applying an inversion pulse current for a short time more than once in a charging period of a secondary battery which deteriorates. By applying the inversion pulse current more than once, deterioration of a lithium-ion secondary battery due to repeated charging can be suppressed even when it is a secondary battery in which the concentration of a lithium salt in an electrolytic solution is lower than 1.0 M and therefore lithium is easily deposited.

Abstract translation: 本发明的目的是提供一种电化学装置，其中即使当电解液中的锂盐浓度低于1.0M时，锂沉积和电池容量的降低也可以被抑制。可以抑制锂沉积并且可以通过以下方式溶解锂晶须 在劣化的二次电池的充电期间，多次施加反转脉冲电流多次。 通过多次施加反转脉冲电流，即使是电解液中的锂盐浓度低于1.0M的二次电池，也能够抑制由于重复充电引起的锂离子二次电池的劣化， 因此易于沉积锂。

公开(公告)号：US20140170500A1

公开(公告)日：2014-06-19

申请号：US14187574

申请日：2014-02-24

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teppei OGUNI ,  Takeshi Osada ,  Toshihiko Takeuchi

IPC: H01M4/583

CPC classification number: H01M4/583 ,  H01B1/04 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/386 ,  H01M4/587 ,  H01M4/626

Abstract: An electrode for a power storage device with good cycle characteristics and high charge/discharge capacity is provided. In addition, a power storage device including the electrode is provided. The electrode for the power storage device includes a conductive layer and an active material layer provided over the conductive layer, the active material layer includes graphene and an active material including a plurality of whiskers, and the graphene is provided to be attached to a surface portion of the active material including a plurality of whiskers and to have holes in part of the active material layer. Further, in the electrode for the power storage device, the graphene is provided to be attached to a surface portion of the active material including a plurality of whiskers and to cover the active material including a plurality of whiskers. Further, the power storage device including the electrode is manufactured.

Abstract translation: 提供具有良好的循环特性和高充电/放电容量的蓄电装置用电极。 另外，提供了包括电极的蓄电装置。 用于蓄电装置的电极包括导电层和设置在导电层上的活性材料层，活性材料层包括石墨烯和包括多个晶须的活性材料，并且石墨烯被提供以附接到表面部分 的活性材料包括多个晶须并且在活性材料层的一部分中具有孔。 此外，在蓄电装置用电极中，设置石墨烯，附着于包含多个晶须的活性物质的表面部分，并覆盖包含多个晶须的活性物质。 此外，制造包括电极的蓄电装置。

公开(公告)号：US20240222629A1

公开(公告)日：2024-07-04

申请号：US18604655

申请日：2024-03-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teppei OGUNI ,  Aya UCHIDA ,  Hiroshi KADOMA

IPC: H01M4/583 ,  H01M4/133 ,  H01M10/0562 ,  H01M4/02 ,  H01M50/431

CPC classification number: H01M4/583 ,  H01M4/133 ,  H01M10/0562 ,  H01M2004/027 ,  H01M2004/028 ,  H01M50/431

Abstract: Provided is a layer for preventing a short circuit between a positive electrode and a negative electrode in a solid battery using a layer containing a solid electrolyte. As the solid electrolyte between the positive electrode and the negative electrode, a layer containing a graphene compound is used. Lithium ions can pass through the layer containing the graphene compound. Lithium ions are added in advance in the layer containing the graphene compound. Specifically, a modifier is used, and a graphene compound chemically modified with a functional group such as ether and ester with an increased interlayer distance is used.