公开(公告)号：US20200321605A1

公开(公告)日：2020-10-08

申请号：US16904618

申请日：2020-06-18

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

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.

公开(公告)号：US20200185763A1

公开(公告)日：2020-06-11

申请号：US16791328

申请日：2020-02-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Tomoya FUTAMURA ,  Tamae MORIWAKA ,  Takahiro KAWAKAMI ,  Junpei MOMO ,  Nobuhiro INOUE

IPC: H01M10/0525 ,  H01M4/66 ,  H01M4/36 ,  H01M4/13 ,  H01M4/58 ,  H01M4/136

Abstract: A lithium ion secondary battery includes a positive electrode, a negative electrode, and an electrolyte provided between the positive electrode and the negative electrode. The positive electrode includes a positive electrode current collector and a positive electrode active material layer over the positive electrode current collector. The positive electrode active material layer includes a plurality of lithium-containing composite oxides each of which is expressed by LiMPO4 (M is one or more of Fe (II), Mn (II), Co (II), and Ni (II)) that is a general formula. The lithium-containing composite oxide is a flat single crystal particle in which the length in the b-axis direction is shorter than each of the lengths in the a-axis direction and the c-axis direction. The lithium-containing composite oxide is provided over the positive electrode current collector so that the b-axis of the single crystal particle intersects with the surface of the positive electrode current collector.

公开(公告)号：US20190326069A1

公开(公告)日：2019-10-24

申请号：US16502345

申请日：2019-07-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Ryota TAJIMA ,  Nobuhiro INOUE ,  Junpei MOMO

IPC: H01G11/42 ,  H01M4/587 ,  H01M4/1393 ,  H01G11/32

Abstract: To improve the long-term cycle performance of a lithium-ion battery or a lithium-ion capacitor by minimizing the decomposition reaction of an electrolytic solution and the like as a side reaction of charge and discharge in the repeated charge and discharge cycles of the lithium-ion battery or the lithium-ion capacitor. A current collector and an active material layer over the current collector are included in an electrode for a power storage device. The active material layer includes a plurality of active material particles and silicon oxide. The surface of one of the active material particles has a region that is in contact with one of the other active material particles. The surface of the active material particle except the region is partly or entirely covered with the silicon oxide.

公开(公告)号：US20180331357A1

公开(公告)日：2018-11-15

申请号：US16032113

申请日：2018-07-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Kiyofumi OGINO

IPC: H01M4/38 ,  H01G11/24 ,  H01M10/0525 ,  H01M10/052 ,  H01M4/48 ,  H01G11/06 ,  H01M4/36 ,  H01M4/134 ,  H01M4/13 ,  H01G11/50 ,  H01M4/02

CPC classification number: H01M4/386 ,  H01G11/06 ,  H01G11/24 ,  H01G11/50 ,  H01M4/13 ,  H01M4/134 ,  H01M4/366 ,  H01M4/38 ,  H01M4/48 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/027 ,  Y02E60/13

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：US20180309119A1

公开(公告)日：2018-10-25

申请号：US16025109

申请日：2018-07-02

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kiyofumi OGINO ,  Yumiko YONEDA (Former SAITO) ,  Rika YATABE ,  Nobuhiro INOUE

IPC: H01M4/38 ,  H01M4/62 ,  H01M4/134

CPC classification number: H01M4/386 ,  H01M4/134 ,  H01M4/38 ,  H01M4/625

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 the power storage device includes a current collector and an active material layer including a plurality of active material particles over the current collector. The active material particle is silicon, and the size of the silicon particle is greater than or equal to 0.001 μm and less than or equal to 7 μm.

公开(公告)号：US20170170466A1

公开(公告)日：2017-06-15

申请号：US15374048

申请日：2016-12-09

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 ,  H01M4/62 ,  H01M4/134 ,  H01M10/0525 ,  H01M4/38

CPC classification number: H01M4/366 ,  H01G11/06 ,  H01G11/28 ,  H01G11/30 ,  H01G11/36 ,  H01G11/50 ,  H01M4/134 ,  H01M4/386 ,  H01M4/626 ,  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：US20170025675A1

公开(公告)日：2017-01-26

申请号：US15285725

申请日：2016-10-05

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro INOUE ,  Kai KIMURA ,  Sachiko KATANIWA ,  Ryota TAJIMA

IPC: H01M4/131 ,  H01G11/06 ,  H01G11/28 ,  H01M4/38 ,  H01G11/46 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/48 ,  H01G11/66 ,  H01G11/58

CPC classification number: H01M4/131 ,  H01G11/06 ,  H01G11/28 ,  H01G11/46 ,  H01G11/50 ,  H01G11/58 ,  H01G11/66 ,  H01G11/68 ,  H01M4/133 ,  H01M4/134 ,  H01M4/1393 ,  H01M4/362 ,  H01M4/366 ,  H01M4/386 ,  H01M4/483 ,  H01M4/485 ,  H01M4/62 ,  H01M4/628 ,  H01M10/0525 ,  H01M2004/027 ,  Y02E60/122 ,  Y02E60/13 ,  Y02P70/54 ,  Y02T10/7022

Abstract: A decomposition reaction of an electrolyte solution and the like caused as a side reaction of charge and discharge is minimized in repeated charge and discharge of a lithium ion battery or a lithium ion capacitor, and thus the lithium ion battery or the lithium ion capacitor can have long-term cycle performance. A negative electrode for a power storage device includes a negative electrode current collector and a negative electrode active material layer which includes a plurality of particles of a negative electrode active material. Each of the particles of the negative electrode active material has an inorganic compound film containing a first inorganic compound on part of its surface. The negative electrode active material layer has a film in contact with an exposed part of the negative electrode active material and part of the inorganic compound film. The film contains an organic compound and a second inorganic compound.

Abstract translation: 在锂离子电池或锂离子电容器的重复充放电中，作为充放电的副反应引起的电解液等的分解反应最小化，锂离子电池或锂离子电容器可以具有 长期循环性能。 蓄电装置的负极包括负极集电体和负极活性物质层，该负极活性物质层包含多个负极活性物质的粒子。 负极活性物质的每个颗粒在其表面的一部分上具有含有第一无机化合物的无机化合物膜。 负极活性物质层具有与负极活性物质的露出部分和无机化合物膜的一部分接触的膜。 该膜含有有机化合物和第二无机化合物。

公开(公告)号：US20150200419A1

公开(公告)日：2015-07-16

申请号：US14669570

申请日：2015-03-26

Applicant: Semiconductor Energy Laboratory Co., LTD.

Inventor： Nobuhiro INOUE ,  Junpei MOMO ,  Hiroatsu TODORIKI ,  Teppei OGUNI

IPC: H01M10/0525 ,  H01M10/0569 ,  H01M4/587 ,  H01M4/583 ,  H01M4/36

CPC classification number: H01M10/0525 ,  B82Y30/00 ,  H01M4/366 ,  H01M4/583 ,  H01M4/587 ,  H01M10/0569 ,  H01M2004/021 ,  H01M2300/0028 ,  Y02E60/122 ,  Y02T10/7011

Abstract: To provide a carbon-based negative electrode material which can be used with an electrolyte containing PC as a main ingredient, a carbon-based negative electrode material having a graphene layer structure is crystalline and has pores. That is, the crystal structure of the carbon-based negative electrode material is distorted more significantly than that of graphite. Accordingly, the carbon-based negative electrode material has a larger interlayer distance between graphenes than graphite. It has been shown that such a negative electrode material can be used for a secondary battery which contains an electrolyte containing PC as a main ingredient.

Abstract translation: 为了提供可与含PC的电解质一起使用的碳类负极材料作为主要成分，具有石墨烯层结构的碳类负极材料为结晶性并具有孔。 也就是说，碳基负极材料的晶体结构比石墨的晶体结构变得更显着。 因此，碳系负极材料的石墨层之间的层间距离比石墨多。 已经表明，这种负极材料可以用于含有以PC为主要成分的电解质的二次电池。

公开(公告)号：US20130266858A1

公开(公告)日：2013-10-10

申请号：US13792598

申请日：2013-03-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO. LTD.

Inventor： Nobuhiro INOUE ,  Sachiko Kataniwa ,  Kazutaka Kuriki ,  Junpei Momo

IPC: H01G11/28 ,  H01M4/62

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.

Abstract translation: 目的是抑制锂离子电池或锂离子电容器中的负极处的电解质溶液等的电化学分解， 因此，不可逆容量降低，循环性能提高，或者工作温度范围延长。 一种蓄电装置用负极，其具备负极集电体和负极活性物质层，该负极活性物质层包含负极活性物质的多个粒子，负极活性物质的负极 电极活性物质。 该膜具有绝缘性和锂离子电导率。

公开(公告)号：US20220263119A1

公开(公告)日：2022-08-18

申请号：US17736687

申请日：2022-05-04

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Tomoya FUTAMURA ,  Tamae MORIWAKA ,  Takahiro KAWAKAMI ,  Junpei MOMO ,  Nobuhiro INOUE

IPC: H01M10/0525 ,  H01M4/136 ,  H01M4/58 ,  H01M4/13 ,  H01M4/36 ,  H01M4/66

Abstract: A lithium ion secondary battery includes a positive electrode, a negative electrode, and an electrolyte provided between the positive electrode and the negative electrode. The positive electrode includes a positive electrode current collector and a positive electrode active material layer over the positive electrode current collector. The positive electrode active material layer includes a plurality of lithium-containing composite oxides each of which is expressed by LiMPO4 (M is one or more of Fe (II), Mn (II), Co (II), and Ni (II)) that is a general formula. The lithium-containing composite oxide is a flat single crystal particle in which the length in the b-axis direction is shorter than each of the lengths in the a-axis direction and the c-axis direction. The lithium-containing composite oxide is provided over the positive electrode current collector so that the b-axis of the single crystal particle intersects with the surface of the positive electrode current collector.