公开(公告)号：US20250125349A1

公开(公告)日：2025-04-17

申请号：US18687367

申请日：2022-08-23

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teruaki OCHIAI ,  Kazutaka KURIKI

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/04 ,  H01M4/62

Abstract: A positive electrode and a secondary battery that are stable in a high potential state and/or a high temperature state are provided. Alternatively, a positive electrode and a secondary battery that have excellent cycle performance are provided. The positive electrode includes a positive electrode active material and a conductive material; at least part of a surface of the positive electrode active material is covered with the conductive material; the positive electrode active material includes lithium cobalt oxide containing magnesium, fluorine, aluminum, and nickel; the lithium cobalt oxide includes a region in which at least one or more concentrations of the magnesium, the fluorine, and the aluminum are the maximum in a surface portion; and the conductive material contains carbon. The conductive material is preferably one or more selected from carbon black, graphene, and a graphene compound.

公开(公告)号：US20240038985A1

公开(公告)日：2024-02-01

申请号：US18356310

申请日：2023-07-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kengo AKIMOTO ,  Kazutaka KURIKI

IPC: H01M4/525 ,  H01M4/66 ,  H01M4/1315 ,  H01M50/178 ,  H01M50/105

CPC classification number: H01M4/525 ,  H01M4/663 ,  H01M4/1315 ,  H01M50/178 ,  H01M50/105 ,  H01M2004/028

Abstract: A positive electrode active material that inhibits a decrease in discharge capacity in charge and discharge cycles and a battery using the positive electrode active material are provided. A high-safety battery is provided. The battery includes a positive electrode including a positive electrode current collector and a positive electrode active material layer. The positive electrode current collector is a carbon sheet. The positive electrode active material contains lithium cobalt oxide containing nickel and magnesium. The detected amount of nickel in a surface portion of the positive electrode active material is larger than that in an inner portion of the positive electrode active material. The detected amount of magnesium in the surface portion of the positive electrode active material is larger than the detected amount of magnesium in the inner portion of the positive electrode active material. The surface portion in the positive electrode active material includes a region where the distribution of nickel and the distribution of magnesium overlap with each other.

公开(公告)号：US20230411619A1

公开(公告)日：2023-12-21

申请号：US18207817

申请日：2023-06-09

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Masayuki KIMURA ,  Kenji ARAI ,  Taisuke NAKAO ,  Kazutaka KURIKI

IPC: H01M4/583 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/36 ,  H01M4/04

CPC classification number: H01M4/583 ,  H01M10/0525 ,  H01M4/386 ,  H01M4/364 ,  H01M4/04 ,  H01M2004/027

Abstract: A negative electrode active material, a negative electrode active material layer, and a secondary battery including them, or a formation method thereof are provided. In one embodiment of the present invention, carbon particles and a silicon-based material are mixed and used as a negative electrode active material. A polymer including a polar substituent such as a carboxy group is used as a binder. Specifically, as the binder for the carbon particles and the silicon-based material, a polymer containing glutamic acid is used. As the silicon-based material, nanosilicon particles each having a particle diameter less than 1 μm is used.

公开(公告)号：US20230331556A1

公开(公告)日：2023-10-19

申请号：US18043102

申请日：2021-08-20

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Tetsuya KAKEHATA ,  Yumiko YONEDA ,  Kazutaka KURIKI

IPC: C01B25/45

CPC classification number: C01B25/45 ,  C01P2006/80 ,  C01P2006/40 ,  C01P2004/04 ,  C01P2002/70

Abstract: A method for manufacturing a highly purified positive electrode active material is provided. Alternatively, a method for manufacturing a positive electrode active material whose crystal structure is not easily broken even when charge and discharge are repeated is provided. The method for manufacturing a positive electrode active material containing lithium and a transition metal includes a first step of preparing a lithium compound, a phosphorus compound, and water; a second step of forming a first mixture by mixing the lithium compound, the phosphorus compound, and the water; a third step of forming a second mixture by adding a first aqueous solution to the first mixture to adjust a pH; a fourth step of forming a third mixture by mixing an iron(II) compound with the second mixture; a fifth step of forming a fourth mixture by heating the third mixture; and a sixth step of obtaining a positive electrode active material by filtering, washing, and drying the fourth mixture. High-purity materials are used as the lithium compound, the phosphorus compound, the water, and the iron(II) compound.

公开(公告)号：US20230216051A1

公开(公告)日：2023-07-06

申请号：US17996697

申请日：2021-04-23

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Yuji IWAKI ,  Kaori OGITA ,  Mayumi MIKAMI ,  Yoshiharu ASADA ,  Tatsuyoshi TAKAHASHI ,  Shunpei YAMAZAKI ,  Kazuki TANEMURA

IPC: H01M4/583 ,  H01M4/04

CPC classification number: H01M4/583 ,  H01M4/0471 ,  H01M2004/027

Abstract: A negative electrode active material particle with little deterioration is provided. Alternatively, a novel negative electrode active material particle is provided. Alternatively, a power storage device with little deterioration is provided. Alternatively, a highly safe power storage device is provided. Alternatively, a novel power storage device is provided. The electrode includes an active material and a conductive additive; the active material contains a metal or a compound including one or more elements selected from silicon, tin, gallium, aluminum, germanium, lead, antimony, bismuth, silver, zinc, cadmium, and indium; the conductive additive contains a graphene compound; and the graphene compound contains fluorine.

公开(公告)号：US20220293923A1

公开(公告)日：2022-09-15

申请号：US17632358

申请日：2020-07-29

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Yumiko YONEDA ,  Hiroshi KADOMA ,  Kaori OGITA ,  Shunpei YAMAZAKI

IPC: H01M4/38 ,  H01M4/36 ,  H01M10/0525

Abstract: A highly reliable solid-state secondary battery with improved cycle performance, reliability, or safety is provided. A negative electrode includes, over a negative electrode current collector, n negative electrode active material layers (n is an integer greater than or equal to 2) and n−1 separation layers. The negative electrode active material layers and the separation layers are alternately stacked. The thickness of the negative electrode active material is greater than or equal to 20 nm and less than or equal to 100 nm. The separation layers each include titanium. The separation layer preferably includes titanium (Ti), titanium nitride (TiN), or titanium oxynitride (TiOxNy, 0

公开(公告)号：US20210384751A1

公开(公告)日：2021-12-09

申请号：US17286088

申请日：2019-10-16

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kei TAKAHASHI ,  Takayuki IKEDA ,  Takanori MATSUZAKI ,  Munehiro KOZUMA ,  Hiroki INOUE ,  Ryota TAJIMA ,  Yohei MOMMA ,  Mayumi MIKAMI ,  Kazutaka KURIKI ,  Shunpei YAMAZAKI

IPC: H02J7/00

Abstract: A battery control circuit with a novel structure, a battery protection circuit with a novel structure, and a power storage device including either of the battery circuits are provided. The power storage device includes a first circuit portion, a second circuit portion, a third circuit portion, and a secondary battery; the first circuit portion has a function of controlling charging of the secondary battery; the first circuit portion has a function of supplying the start time and the end time of the charging of the secondary battery to the third circuit portion; the second circuit portion has functions of generating a first voltage and a first current and supplying them to the third circuit portion; the third circuit portion has a function of generating a second voltage by charging the first current in a capacitor; and the third circuit portion has a function of comparing the first voltage and the second voltage.

公开(公告)号：US20210073610A1

公开(公告)日：2021-03-11

申请号：US16772281

申请日：2018-12-18

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Sachiaki TEZUKA ,  Kouhei TOYOTAKA

IPC: G06N3/02 ,  H01L21/02 ,  H05H1/46

Abstract: A thin film manufacturing apparatus capable of forming thin films with high uniformity is provided. A thin film manufacturing apparatus capable of controlling various kinds of set conditions during thin film formation is provided. The thin film manufacturing apparatus includes a treatment chamber, a gas supply means, an evacuation means, an electric power supply means, an arithmetic portion, and a control device; the gas supply means supplies gas into the treatment chamber; the evacuation means adjusts a pressure in the treatment chamber; the electric power supply means applies voltage between electrodes provided in the treatment chamber; the arithmetic portion has a function of performing detection of an abnormal state and inference with the use of a neural network during thin film formation; and the control device controls various kinds of set conditions in accordance with results of the detection and the inference during the thin film formation.

公开(公告)号：US20200076223A1

公开(公告)日：2020-03-05

申请号：US16610931

申请日：2018-05-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Ryota TAJIMA ,  Hideaki SHISHIDO ,  Yusuke YOSHITANI ,  Haruki KATAGIRI ,  Yohei MOMMA

IPC: H02J7/04 ,  H02J7/02 ,  H02J7/00 ,  H02J50/20 ,  H02J50/80 ,  B60L53/12 ,  B60L50/60 ,  B60L53/62 ,  G05B13/02 ,  H01M10/46 ,  H01M10/44

Abstract: A charging control device using machine learning is provided. A high-security charging control device is provided. A charging control system with little deterioration is provided. A storage battery having excellent characteristics is provided.An approximate charging end time is calculated. A result obtained when it is different from the estimated charging end time is fed back and learned, and accordingly the charging end can be precisely estimated after the next time. That is, the portable information terminal makes a charging plan with the use of artificial intelligence and the secondary battery is charged based on information about the charging plan. The charging plan is made to reduce the retention time of the full charging (SOC 100%) and charging is executed. Charging history information is stored in the portable information terminal and made use of to make the next charging plan.

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.