公开(公告)号：US10541409B2

公开(公告)日：2020-01-21

申请号：US15907317

申请日：2018-02-28

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro Inoue ,  Kai Kimura ,  Sachiko Kataniwa ,  Ryota Tajima

IPC: H01M4/00 ,  H01M4/131 ,  H01G11/68 ,  H01M4/62 ,  H01M4/1393 ,  H01M4/133 ,  H01M4/36 ,  H01G11/06 ,  H01G11/28 ,  H01G11/50 ,  H01G11/46 ,  H01G11/58 ,  H01M4/134 ,  H01M4/38 ,  H01M4/485 ,  H01G11/66 ,  H01M4/48 ,  H01M10/0525 ,  H01M4/02

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.

公开(公告)号：US10529990B2

公开(公告)日：2020-01-07

申请号：US15668743

申请日：2017-08-04

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kai Kimura ,  Kazutaka Kuriki ,  Teppei Oguni ,  Aya Uchida

IPC: H01M4/13 ,  H01M4/62 ,  H01G11/28 ,  H01G11/24 ,  H01G11/26 ,  H01G11/38 ,  H01M4/133 ,  H01M10/0525 ,  H01M10/0566 ,  H01M10/44 ,  H01M4/02 ,  H01M10/42

Abstract: A power storage device with high capacity or high energy density is provided. A highly reliable power storage device is provided. A long-life power storage device is provided. An electrode includes an active material, a first binder, and a second binder. The specific surface area of the active material is S [m2/g]. The weight of the active material, the weight of the first binder, and the weight of the second binder are a, b, and c, respectively. The solution of {(b+c)/(a+b+c)}×100÷S is 0.3 or more. The electrode includes a first film in contact with the active material. The first film preferably includes a region in contact with the active material. The first film preferably includes a region with a thickness of 2 nm or more and 20 nm or less. The first film contains a water-soluble polymer.

公开(公告)号：US10230095B2

公开(公告)日：2019-03-12

申请号：US15156524

申请日：2016-05-17

Applicant: Semiconductor Energy Laboratory Co., LTD.

Inventor： Kai Kimura ,  Tatsuya Ikenuma ,  Nobuhiro Inoue ,  Teppei Oguni

IPC: H01M4/133 ,  H01M4/36 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/38 ,  H01M10/052 ,  H01M4/02

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：US09806334B2

公开(公告)日：2017-10-31

申请号：US14060674

申请日：2013-10-23

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka Kuriki ,  Kai Kimura ,  Nobuhiro Inoue ,  Ryota Tajima ,  Tamae Moriwaka ,  Kiyofumi Ogino

IPC: H01M4/62 ,  H01M4/66 ,  H01M4/36 ,  H01G11/06 ,  H01G11/28 ,  H01M10/42

CPC classification number: H01M4/366 ,  H01G11/06 ,  H01G11/28 ,  H01M4/667 ,  H01M10/4235 ,  Y02E60/13 ,  Y02P70/54 ,  Y02T10/7022

Abstract: Irreversible capacity which causes a decrease in the charge and discharge capacity of a power storage device is reduced, and electrochemical decomposition of an electrolyte solution and the like on a surface of an electrode is inhibited. Further, the cycle characteristics of the power storage device is improved by reducing or inhibiting a decomposition reaction of the electrolyte solution and the like occurring as a side reaction in repeated charging and discharging of the power storage device. A power storage device electrode includes a current collector and an active material layer that is over the current collector and includes a binder and an active material. A coating film is provided on at least part of a surface of the active material. The coating film is spongy.

公开(公告)号：US09911971B2

公开(公告)日：2018-03-06

申请号：US15618460

申请日：2017-06-09

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro Inoue ,  Kai Kimura ,  Sachiko Kataniwa ,  Ryota Tajima

IPC: H01M4/00 ,  H01M4/131 ,  H01M4/36 ,  H01G11/50 ,  H01M4/134 ,  H01M4/133 ,  H01G11/46 ,  H01M10/0525 ,  H01G11/66 ,  H01G11/68 ,  H01M4/48 ,  H01G11/28 ,  H01M4/62 ,  H01G11/58 ,  H01G11/06 ,  H01M4/485 ,  H01M4/1393 ,  H01M4/38 ,  H01M4/02

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.

公开(公告)号：US09183995B2

公开(公告)日：2015-11-10

申请号：US13898509

申请日：2013-05-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Nobuhiro Inoue ,  Kai Kimura ,  Sachiko Kataniwa ,  Ryota Tajima

IPC: H01M4/00 ,  H01G11/68 ,  H01M4/62 ,  H01M4/1393 ,  H01M4/133 ,  H01M4/36 ,  H01G11/06 ,  H01G11/28 ,  H01G11/50

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：US20130323585A1

公开(公告)日：2013-12-05

申请号：US13898509

申请日：2013-05-21

Applicant: Semiconductor Energy Laboratory CO., LTD.

Inventor： Nobuhiro Inoue ,  Kai Kimura ,  Sachiko Kataniwa ,  Ryota Tajima

IPC: H01G11/68 ,  H01M4/1393 ,  H01M4/62

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：US11152622B2

公开(公告)日：2021-10-19

申请号：US16728135

申请日：2019-12-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kai Kimura ,  Kazutaka Kuriki ,  Teppei Oguni ,  Aya Uchida

IPC: H01M4/62 ,  H01G11/28 ,  H01G11/24 ,  H01G11/26 ,  H01G11/38 ,  H01M4/13 ,  H01M4/133 ,  H01M10/0525 ,  H01M10/0566 ,  H01M10/44 ,  H01M4/02 ,  H01M10/42

Abstract: A power storage device with high capacity or high energy density is provided. A highly reliable power storage device is provided. A long-life power storage device is provided. An electrode includes an active material, a first binder, and a second binder. The specific surface area of the active material is S [m2/g]. The weight of the active material, the weight of the first binder, and the weight of the second binder are a, b, and c, respectively. The solution of {(b+c)/(a+b+c)}×100÷S is 0.3 or more. The electrode includes a first film in contact with the active material. The first film preferably includes a region in contact with the active material. The first film preferably includes a region with a thickness of 2 nm or more and 20 nm or less. The first film contains a water-soluble polymer.

公开(公告)号：US10483044B2

公开(公告)日：2019-11-19

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

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：US10128529B2

公开(公告)日：2018-11-13

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: H01M6/04 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/136 ,  H01M4/36 ,  H01M4/58 ,  H01M4/587 ,  H01M4/66 ,  H01M10/04 ,  H01M10/0567 ,  H01M10/058 ,  G01R31/36 ,  G01R31/44 ,  H01M4/62 ,  H01M10/0568 ,  H01M10/0569 ,  H02J7/00 ,  H01M10/42

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.