公开(公告)号：US20240186511A1

公开(公告)日：2024-06-06

申请号：US18442586

申请日：2024-02-15

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takuya MIWA ,  Yumiko YONEDA ,  Teppei OGUNI

IPC: H01M4/58 ,  C01B25/45 ,  H01M4/02 ,  H01M10/0525

CPC classification number: H01M4/5825 ,  C01B25/45 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/40 ,  H01M2004/028 ,  H01M10/0525

Abstract: A composite oxide with high diffusion rate of lithium is provided. Alternatively, a lithium-containing complex phosphate with high diffusion rate of lithium is provided. Alternatively, a positive electrode active material with high diffusion rate of lithium is provided. Alternatively, a lithium ion battery with high output is provided. Alternatively, a lithium ion battery that can be manufactured at low cost is provided. A positive electrode active material is formed through a first step of mixing a lithium compound, a phosphorus compound, and water, a second step of adjusting pH by adding a first aqueous solution to a first mixed solution formed in the first step, a third step of mixing an iron compound with a second mixed solution formed in the second step, a fourth step of performing heat treatment under a pressure more than or equal to 0.1 MPa and less than or equal to 2 MPa at a highest temperature more than 100° C. and less than or equal to 119° C. on a third mixed solution formed in the third step with a pH of more than or equal to 3.5 and less than or equal to 5.0.

公开(公告)号：US20240170667A1

公开(公告)日：2024-05-23

申请号：US18550769

申请日：2022-03-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Tetsuya KAKEHATA ,  Yohei MOMMA ,  Yumiko YONEDA ,  Kazutaka KURIKI ,  Tatsuyoshi TAKAHASHI ,  Kunihiro FUKUSHIMA

IPC: H01M4/525 ,  B60L50/64 ,  H01M4/02 ,  H01M4/131 ,  H01M50/109

CPC classification number: H01M4/525 ,  H01M4/131 ,  H01M50/109 ,  B60L50/64 ,  H01M2004/028 ,  H01M2220/20

Abstract: A battery in which a decrease in discharge capacity retention rate in charge and discharge cycle tests is inhibited is provided. The battery includes a positive electrode and a negative electrode. The positive electrode is used as a positive electrode of a test battery in which a negative electrode includes a lithium metal. When a test of 50 repetitions of a cycle of charge and discharge in which, after constant current charge is performed at a charge rate of 1 C (1 C=200 mA/g) until a voltage of 4.6 V is reached, constant voltage charge is performed at a voltage of 4.6 V until the charge rate reaches 0.1 C, and constant current discharge is then performed at a discharge rate of 1 C until a voltage of 2.5 V is reached is performed in a 25° C. environment or a 45° C. environment and discharge capacity is measured in each cycle, a discharge capacity value measured in a 50th cycle accounts for higher than or equal to 90% and lower than 100% of a maximum discharge capacity value in all 50 cycles.

公开(公告)号：US20230253574A1

公开(公告)日：2023-08-10

申请号：US18135445

申请日：2023-04-17

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yumiko YONEDA ,  Takuya MIWA

IPC: H01M6/10 ,  H01M4/1397 ,  H01M4/36 ,  H01M4/58 ,  H01M10/04

CPC classification number: H01M6/10 ,  H01M4/1397 ,  H01M4/364 ,  H01M4/5825 ,  H01M10/0431 ,  H01M10/052

Abstract: A positive electrode active material includes a plurality of groups of particles. The plurality of groups of particles has a particle diameter of more than or equal to 300 nm and less than or equal to 3 μm. Each of the groups includes two or more particles. The two or more particles are each a lithium-containing complex phosphate including one or more of iron, nickel, manganese, and cobalt. The group of particles includes a first particle and a second particle each having a major diameter and a minor diameter in the upper surface when seen from a predetermined direction. The major diameters of the first and second particles are substantially parallel to each other. The major diameter of the first particle is two to six times larger than the minor diameter of the first particle and the minor diameter of the first particle is more than or equal to 20 nm and less than or equal to 130 nm.

公开(公告)号：US20230141951A1

公开(公告)日：2023-05-11

申请号：US17905093

申请日：2021-03-01

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Hiroshi KADOMA ,  Kazutaka KURIKI ,  Yumiko YONEDA ,  Kaori OGITA ,  Fumiko TANAKA ,  Yohei MOMMA ,  Shunpei YAMAZAKI

IPC: H01M10/0565 ,  H01M4/38 ,  H01M4/04

CPC classification number: H01M10/0565 ,  H01M4/386 ,  H01M4/0404 ,  H01M2004/027 ,  H01M2300/0082

Abstract: Interface contact between a polymer electrolyte and an active material layer is improved. A secondary battery with improved discharge capacity is provided. The secondary battery includes a positive electrode, a negative electrode, and an electrolyte layer between the positive electrode and the negative electrode. The positive electrode includes a positive electrode active material, a first lithium-ion conductive polymer, a first lithium salt, and a conductive material over a positive electrode current collector. The electrolyte layer includes a second lithium-ion conductive polymer and a second lithium salt. The conductive material is preferably graphene. The negative electrode preferably includes a negative electrode active material, a third lithium-ion conductive polymer, a third lithium salt, and a second conductive material over a negative electrode current collector.

公开(公告)号：US20230044589A1

公开(公告)日：2023-02-09

申请号：US17767987

申请日：2020-10-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kaori OGITA ,  Hiroshi KADOMA ,  Tomoya HIROSE ,  Yumiko YONEDA ,  Yuji IWAKI ,  Tatsuyoshi TAKAHASHI ,  Shunpei YAMAZAKI

IPC: H01M4/62 ,  H01M10/0585 ,  H01M4/36 ,  H01M10/0562 ,  H01M4/525 ,  H01M4/131 ,  H01M4/66

Abstract: A secondary battery with excellent cycle performance is provided. The secondary battery is an all-solid-state battery including a positive electrode current collector layer, a base film, a positive electrode active material layer, a buffer layer, and a solid electrolyte layer. The base film contains titanium nitride. The positive electrode active material layer contains lithium cobalt oxide. The buffer layer contains titanium oxide. The solid electrolyte layer contains a titanium compound. By using titanium oxide for the buffer layer, a side reaction between the positive electrode active material layer and the solid electrolyte layer can be suppressed, and cycle performance can be improved.

公开(公告)号：US20230028284A1

公开(公告)日：2023-01-26

申请号：US17788369

申请日：2020-12-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teruaki OCHIAI ,  Yumiko YONEDA ,  Kazuhei NARITA ,  Kazutaka KURIKI

IPC: H01M4/04 ,  H01M4/62

Abstract: A method for manufacturing a novel electrode is provided. The method includes the steps of applying, to a current collector, a mixture comprising an active material, a conductive additive comprising a graphene compound, a binder, and a dispersion medium; performing a drying treatment on the mixture; performing a heat treatment on the mixture at a temperature higher than a temperature of the drying treatment; reducing the graphene compound in the mixture by a chemical reaction using a reducing agent; and performing a thermal reduction treatment on the mixture at a temperature higher than the temperature of the heat treatment.

公开(公告)号：US20220149429A1

公开(公告)日：2022-05-12

申请号：US17438615

申请日：2020-03-12

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Kazutaka KURIKI ,  Ryota TAJIMA ,  Yumiko YONEDA

IPC: H01M10/0562 ,  H01M4/04 ,  H01M4/38 ,  H01M10/058

Abstract: An all-solid-state secondary battery having a higher level of safety than a conventional lithium-ion secondary battery using an electrolyte solution, specifically, a thin-film-type solid-state secondary battery, and a manufacturing method thereof are provided. As a solid electrolyte, a mixed material obtained by co-evaporation of SiO and an organic complex of lithium is used. That is, a solid electrolyte layer formed using a mixed material of an inorganic material and an organic material is used in a solid-state secondary battery. The ratio of oxygen to silicon in the solid electrolyte layer is higher than 1 and lower than 2.

公开(公告)号：US20220115661A1

公开(公告)日：2022-04-14

申请号：US17424296

申请日：2020-01-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Ryota TAJIMA ,  Yumiko YONEDA ,  Yohei MOMMA ,  Shunpei YAMAZAKI

IPC: H01M4/583 ,  H01M10/0562 ,  H01M10/0525 ,  H01M4/38

Abstract: Use of silicon as a negative electrode active material particle causes a problem of expansion and contraction of the negative electrode active material particle due to charging and discharging. A negative electrode active material particle or a plurality of negative electrode active material particles are bound or fixed using a graphene compound to inhibit expansion and contraction of the negative electrode active material particle due to charging and discharging. In an all-solid-state secondary battery, an interface between a solid electrolyte and a negative electrode or an interface between the solid electrolyte and a positive electrode has the highest resistance. In order to reduce the interface resistance, at least the negative electrode active material particle is surrounded by a graphene compound to increase the conductivity. Alternatively, a positive electrode active material particle is surrounded by a graphene compound to increase the conductivity. Carrier ions, e.g., lithium ions, pass through a graphene compound, and thus the graphene compound does not hinder the transfer of lithium ions between the positive electrode and the negative electrode in charging or discharging.

公开(公告)号：US20160013469A1

公开(公告)日：2016-01-14

申请号：US14751443

申请日：2015-06-26

Applicant: Semiconductor Energy Laboratory Co., LTD.

Inventor： Ryota TAJIMA ,  Yuugo GOTO ,  Yumiko YONEDA ,  Junya GOTO ,  Takuya MIWA ,  Masaaki HIROKI

IPC: H01M4/13 ,  H01M4/70 ,  H01M10/0525 ,  H01M2/02 ,  H01M4/66

CPC classification number: H01M4/13 ,  H01M2/0275 ,  H01M4/139 ,  H01M10/0525 ,  H01M2002/0205 ,  H01M2004/021 ,  H01M2220/20 ,  H01M2220/30 ,  Y02E60/122

Abstract: An electronic device having a novel structure, specifically, an electronic device having a novel structure that can be changed into various appearances is provided. Specifically, after an active material layer is formed on one or both surfaces of a current collector, the active material layer in a bent region is partly removed. The removed region of the active material layer can be in a linear shape, a dot shape, or a matrix shape, for example. After the active material layer is formed on one or both surfaces of the current collector, laser processing for removing part of the active material layer in an irradiation region is performed using laser light or the like. On the region where the surface of the current collector is exposed, the active material layer is not provided, and this region is a region that does not function as a battery. Owing to this region, a secondary battery with a wide movable region can be achieved.

Abstract translation: 提供具有新颖结构的电子装置，具体地说，具有可以改变为各种外观的新颖结构的电子装置。 具体地说，在集电体的一个或两个表面上形成活性物质层之后，部分除去弯曲区域中的活性物质层。 活性物质层的去除区域例如可以是直线形状，点状或矩阵形状。 在集电体的一个或两个表面上形成活性物质层之后，使用激光等进行用于去除照射区域中的活性物质层的一部分的激光加工。 在集电体的表面暴露的区域，没有设置活性物质层，该区域是不能充当电池的区域。 由于该区域，可以实现具有宽移动区域的二次电池。

公开(公告)号：US20250118802A1

公开(公告)日：2025-04-10

申请号：US18981953

申请日：2024-12-16

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

IPC: H01M10/0565 ,  H01M4/02 ,  H01M4/13 ,  H01M10/04 ,  H01M10/052 ,  H01M10/0585 ,  H01M50/119 ,  H01M50/121 ,  H01M50/122 ,  H01M50/124

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.