公开(公告)号：US20210057738A1

公开(公告)日：2021-02-25

申请号：US17094526

申请日：2020-11-10

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Kiyofumi OGINO

IPC: H01M4/38 ,  H01G11/06 ,  H01G11/24 ,  H01G11/50 ,  H01M4/13 ,  H01M4/134 ,  H01M4/36 ,  H01M10/052 ,  H01M4/48 ,  H01M10/0525

Abstract: A power storage device with high capacity is provided. Alternatively, a power storage device with excellent cycle characteristics is provided. Alternatively, a power storage device with high charge and discharge efficiency is provided. Alternatively, a power storage device with a long lifetime is provided. A negative electrode active material includes a first region and a second region. The first region includes at least one element selected from Si, Mg, Ca, Ga, Al, Ge, Sn, Pb, Sb, Bi, Ag, Zn, Cd, As, Hg, and In. The second region includes oxygen and the same element as the one included in the first region. The crystallite size of the element included in the first region is larger than or equal to 1 nm and smaller than or equal to 10 nm.

公开(公告)号：US20200168892A1

公开(公告)日：2020-05-28

申请号：US16774296

申请日：2020-01-28

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Ryota TAJIMA ,  Naoki KURIHARA ,  Junpei MOMO

IPC: H01M4/134 ,  H01M4/62 ,  H01M4/66 ,  H01M10/052 ,  H01M4/38

Abstract: An object of one embodiment of the present invention is to provide a secondary battery in which deterioration of charge-discharge cycle characteristics is suppressed, to suppress generation of defects caused by expansion and contraction of an active material in a negative electrode, or to prevent deterioration caused by deformation of a secondary battery. To prevent deterioration, a material that can be alloyed with lithium and fluidified easily is used for a negative electrode. To hold a negative electrode active material over a surface of a current collector, a covering layer that covers the negative electrode active material is provided. Furthermore, a portion where the current collector and the negative electrode active material are in contact with each other is alloyed. In other words, an alloy that is in contact with both the current collector and the negative electrode active material is provided in the negative electrode.

公开(公告)号：US20190245195A1

公开(公告)日：2019-08-08

申请号：US16384086

申请日：2019-04-15

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Sachiko KATANIWA ,  Kazutaka KURIKI ,  Junpei MOMO

IPC: H01M4/04 ,  H01M10/0525 ,  H01M4/62 ,  H01G11/50 ,  H01M4/133 ,  H01M4/583 ,  H01G11/28 ,  H01G11/84

CPC classification number: H01M4/0404 ,  H01G11/28 ,  H01G11/50 ,  H01G11/84 ,  H01M4/0471 ,  H01M4/133 ,  H01M4/583 ,  H01M4/623 ,  H01M4/628 ,  H01M10/0525 ,  H01M2004/027 ,  Y02E60/13 ,  Y02T10/7022

Abstract: An object is to suppress electrochemical decomposition of an electrolyte solution and the like at a negative electrode in a lithium ion battery or a lithium ion capacitor: thus, irreversible capacity is reduced, cycle performance is improved, or operating temperature range is extended. A negative electrode for a power storage device including a negative electrode current collector, a negative electrode active material layer which is over the negative electrode current collector and includes a plurality of particles of a negative electrode active material, and a film covering part of the negative electrode active material. The film has an insulating property and lithium ion conductivity.

公开(公告)号：US20170288256A1

公开(公告)日：2017-10-05

申请号：US15622995

申请日：2017-06-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya MIWA ,  Kuniharu NOMOTO ,  Nobuhiro INOUE

IPC: H01M10/04 ,  H01M4/58

CPC classification number: H01G9/042 ,  B82Y30/00 ,  H01M4/5825 ,  H01M4/622 ,  H01M4/625 ,  H01M10/04 ,  Y10T29/417 ,  Y10T29/49115

Abstract: At least one of an aqueous solution A containing lithium, an aqueous solution B containing iron, manganese, cobalt, or nickel, and an aqueous solution C containing a phosphoric acid includes graphene oxide. The aqueous solution A is dripped into the aqueous solution C, so that a mixed solution E including a precipitate D is prepared. The mixed solution E is dripped into the aqueous solution B, so that a mixed solution G including a precipitate F is prepared. The mixed solution G is subjected to heat treatment in a pressurized atmosphere, so that a mixed solution H is prepared, and the mixed solution H is then filtered. Thus, particles of a compound containing lithium and oxygen which have a small size are obtained.

公开(公告)号：US20170288205A1

公开(公告)日：2017-10-05

申请号：US15621520

申请日：2017-06-13

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Nobuhiro INOUE ,  Sachiko KATANIWA ,  Kazutaka KURIKI ,  Junpei MOMO

IPC: H01M4/04

CPC classification number: H01M4/0404 ,  H01G11/28 ,  H01G11/50 ,  H01G11/84 ,  H01M4/0471 ,  H01M4/133 ,  H01M4/583 ,  H01M4/623 ,  H01M4/628 ,  H01M10/0525 ,  H01M2004/027 ,  Y02E60/13 ,  Y02T10/7022

Abstract: An object is to suppress electrochemical decomposition of an electrolyte solution and the like at a negative electrode in a lithium ion battery or a lithium ion capacitor; thus, irreversible capacity is reduced, cycle performance is improved, or operating temperature range is extended. A negative electrode for a power storage device including a negative electrode current collector, a negative electrode active material layer which is over the negative electrode current collector and includes a plurality of particles of a negative electrode active material, and a film covering part of the negative electrode active material. The film has an insulating property and lithium ion conductivity.

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：US20160315309A1

公开(公告)日：2016-10-27

申请号：US15200015

申请日：2016-07-01

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Sachiko KATANIWA ,  Kazutaka KURIKI ,  Junpei MOMO

IPC: H01M4/04 ,  H01M4/62 ,  H01M4/133 ,  H01M4/583 ,  H01G11/84 ,  H01M10/0525

CPC classification number: H01M4/0404 ,  H01G11/28 ,  H01G11/50 ,  H01G11/84 ,  H01M4/0471 ,  H01M4/133 ,  H01M4/583 ,  H01M4/623 ,  H01M4/628 ,  H01M10/0525 ,  H01M2004/027 ,  Y02E60/13 ,  Y02T10/7022

Abstract: An object is to suppress electrochemical decomposition of an electrolyte solution and the like at a negative electrode in a lithium ion battery or a lithium ion capacitor; thus, irreversible capacity is reduced, cycle performance is improved, or operating temperature range is extended. A negative electrode for a power storage device including a negative electrode current collector, a negative electrode active material layer which is over the negative electrode current collector and includes a plurality of particles of a negative electrode active material, and a film covering part of the negative electrode active material. The film has an insulating property and lithium ion conductivity.

公开(公告)号：US20150132648A1

公开(公告)日：2015-05-14

申请号：US14528579

申请日：2014-10-30

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Ryota TAJIMA ,  Naoki KURIHARA ,  Junpei MOMO

IPC: H01M4/80 ,  H01M4/1395 ,  H01M4/04 ,  H01M4/38 ,  H01M4/66

CPC classification number: H01M4/80 ,  H01M4/0404 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/38 ,  H01M4/387 ,  H01M4/661 ,  H01M4/668 ,  H01M2220/30

Abstract: To inhibit degradation of charge and discharge cycle characteristics of a secondary battery. To suppress generation of defects due to expansion and contraction of an active material in a negative electrode. To inhibit deterioration of an electrode due to changes in its form. An electrode member including a current collector, an active material, and a porous body is used. The porous body is in contact with one surface of the current collector and includes a plurality of spaces. The active material is located in the space in the porous body. The space has a larger size than the active material.

Abstract translation: 为了抑制二次电池的充放电循环特性的劣化。 抑制由负极中的活性物质的膨胀和收缩导致的缺陷的产生。 为了抑制由于其形状的变化引起的电极的劣化。 使用包括集电体，活性物质和多孔体的电极构件。 多孔体与集电体的一个表面接触并且包括多个空间。 活性物质位于多孔体的空间中。 该空间的尺寸比活性材料大。

公开(公告)号：US20250046799A1

公开(公告)日：2025-02-06

申请号：US18826241

申请日：2024-09-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Hiroyuki MIYAKE ,  Nobuhiro INOUE ,  Ryo YAMAUCHI ,  Mako MOTOYOSHI ,  Takahiro KAWAKAMI ,  Mayumi MIKAMI ,  Miku FUJITA ,  Shunpei YAMAZAKI

IPC: H01M4/36 ,  H01G11/06 ,  H01G11/28 ,  H01G11/30 ,  H01G11/36 ,  H01G11/50 ,  H01M4/134 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0525

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 a power storage device includes a number of composites in particulate forms. The composites include a negative electrode active material, a first functional material, and a compound. The compound includes a constituent element of the negative electrode active material and a constituent element of the first functional material. The negative electrode active material includes a region in contact with at least one of the first functional material or the compound.

公开(公告)号：US20230361271A1

公开(公告)日：2023-11-09

申请号：US18218248

申请日：2023-07-05

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Teppei OGUNI ,  Tamae MORIWAKA ,  Junpei MOMO ,  Ryota TAJIMA ,  Nobuhiro INOUE

IPC: H01M4/133 ,  H01M4/587 ,  H01M4/36

CPC classification number: H01M4/133 ,  H01M4/587 ,  H01M4/366

Abstract: A secondary battery in which graphite that is an active material can occlude and release lithium efficiently is provided. Further, a highly reliable secondary battery in which the amount of lithium inserted and extracted into/from graphite that is an active material is prevented from varying is provided. The secondary battery includes a negative electrode including a current collector and graphite provided over the current collector, and a positive electrode. The graphite includes a plurality of graphene layers. Surfaces of the plurality of graphene layers are provided substantially along the direction of an electric field generated between the positive electrode and the negative electrode.