公开(公告)号：US20250140843A1

公开(公告)日：2025-05-01

申请号：US18927228

申请日：2024-10-25

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Mayumi MIKAMI ,  Jo SAITO ,  Teruaki OCHIAI ,  Masahiro TAKAHASHI ,  Tatsuyoshi TAKAHASHI ,  Yohei MOMMA ,  Kazutaka KURIKI ,  Kazune YOKOMIZO ,  Shunpei YAMAZAKI ,  Rihito WADA

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/36 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/0569

Abstract: To provide a positive electrode active material in which a phase transition is inhibited and a secondary battery including the positive electrode active material. An unprecedented synthesis method has been developed in which lithium cobalt oxide particles are treated with a molten salt of MgF2—LiF as a reaction accelerator to facilitate the diffusion and doping of magnesium into lithium cobalt oxide bulk and to form a stable coating layer in the particle surface portion. Ex situ XRD analysis confirms the inhibition of the harmful phase transition and the emergence of a novel phase as the modified LiCoO2 is charged up to 4.7 V. The modified LiCoO2 shows high electrochemical performance during high-voltage operation. This technology provides a guideline for suppressing fundamental degradation associated with phase transition and achieving ultra-high energy density LiCoO2 positive electrodes.

公开(公告)号：US20250125329A1

公开(公告)日：2025-04-17

申请号：US18999021

申请日：2024-12-23

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

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

IPC: H01M4/04 ,  C23C14/04 ,  C23C14/56 ,  H01M10/0562 ,  H01M10/0585

Abstract: An object is to achieve a manufacturing apparatus that can fully automate the manufacturing of a solid-state secondary battery. A mask alignment chamber, a first transfer chamber connected to the mask alignment chamber, a second transfer chamber connected to the first transfer chamber, a first film formation chamber connected to the second transfer chamber, a third transfer chamber connected to the first transfer chamber, and a second film formation chamber connected to the third transfer chamber are included. The first film formation chamber has a function of forming a positive electrode active material layer or a negative electrode active material layer by a sputtering method, the second film formation chamber has a function of forming a solid electrolyte layer by co-evaporation of an organic complex of lithium and SiOx (0

公开(公告)号：US20250087684A1

公开(公告)日：2025-03-13

申请号：US18798072

申请日：2024-08-08

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shuji FUKAI ,  Kazutaka KURIKI ,  Yumiko YONEDA ,  Yosiharu ASADA ,  Kazuya SHIMADA

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/04 ,  H01M10/0525 ,  H01M10/0569

Abstract: A method for forming a positive electrode active material applicable to a lithium-ion battery having excellent charge and discharge characteristics even in a low-temperature environment is provided. The method for forming a positive electrode active material includes: a first step of heating lithium cobalt oxide with a median diameter of less than or equal to 10 μm; a second step of mixing a fluorine source and a magnesium source with the lithium cobalt oxide subjected to the first step, thereby forming a first mixture; a third step of heating the first mixture; a fourth step of mixing a nickel source and an aluminum source with the first mixture subjected to the third step, thereby forming a second mixture; and a fifth step of heating the second mixture. The third step and the fifth step are performed in a state where the first mixture is held to have a thickness of less than or equal to 2.0 mm in a first setter. The first step, the third step, and the fifth step are performed in an atmosphere containing oxygen.

公开(公告)号：US20250055087A1

公开(公告)日：2025-02-13

申请号：US18724035

申请日：2022-12-16

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Seiya SAITO ,  Teruaki OCHIAI ,  Kengo AKIMOTO

IPC: H01M50/136 ,  H01G11/28 ,  H01G11/50 ,  H01M4/02 ,  H01M4/04 ,  H01M4/38 ,  H01M4/525 ,  H01M50/105

Abstract: The relative position shifts of a positive electrode and a negative electrode occur owing to bending in charge or discharge, whereby uneven distribution is caused and potential varies. Not graphite but a lithium metal film is used as the negative electrode. A lithium metal film is formed over one side of the negative electrode current collector by an evaporation method or a sputtering method, and a laminated body is formed such that surfaces of two negative electrode current collectors where no film is formed are in contact with each other.

公开(公告)号：US20250007051A1

公开(公告)日：2025-01-02

申请号：US18707723

申请日：2022-10-31

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Yumiko YONEDA ,  Seiya SAITO ,  Tatsuyoshi TAKAHASHI

IPC: H01M50/129 ,  H01M50/54

Abstract: A secondary battery that has flexibility and can inhibit degradation of a positive electrode lead connection portion or a negative electrode lead connection portion is provided. The secondary battery has a structure in which a positive electrode lead is connected to a positive electrode current collector exposed portion of a first positive electrode and a positive electrode current collector exposed portion of a second positive electrode while penetrating through the inner side of one opening portion of a first separator, an opening portion of a first negative electrode, and one opening portion of a second separator; a negative electrode lead is connected to a negative electrode current collector exposed portion of a first negative electrode while penetrating through the inner side of the other opening portion of the first separator; and the negative electrode lead and the negative electrode current collector exposed portion of the first negative electrode are connected to a negative electrode current collector exposed portion of a second negative electrode while penetrating through the inner side of the other opening portion of the second separator, an opening portion of the first positive electrode, an opening portion of the second positive electrode, and the other opening portion provided in a third separator.

公开(公告)号：US20240413324A1

公开(公告)日：2024-12-12

申请号：US18703508

申请日：2022-10-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Seiya SAITO ,  Tetsuya KAKEHATA ,  Kazutaka KURIKI ,  Taisuke NAKAO ,  Kenji ARAI

IPC: H01M4/525 ,  H01M4/02 ,  H01M10/0525 ,  H01M10/0569

Abstract: A lithium ion battery having excellent discharge characteristics even at a temperature below freezing is provided. The lithium ion battery includes a positive electrode containing a positive electrode active material, an electrolyte solution, and a negative electrode containing a negative electrode active material that is a carbon material; the carbon material has peaks at 2θ of greater than or equal to 20° and less than or equal to 24°, 2θ of greater than or equal to 42° and less than or equal to 46.5°, and 2θ of greater than or equal to 78° and less than or equal to 82° in X-ray diffraction (XRD) analysis; and a value of the discharge capacity obtained by subjecting the lithium ion battery to constant current and constant voltage charging (0.1 C, 4.5 V, and a termination current of 0.01 C) at 25° C. and then discharging at −40° C. is higher than or equal to 40% of a value of the discharge capacity in discharging at 25° C.

公开(公告)号：US20240396357A1

公开(公告)日：2024-11-28

申请号：US18687412

申请日：2022-08-22

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takeshi OSADA ,  Haruki KATAGIRI ,  Kyoichi MUKAO ,  Mayumi MIKAMI ,  Kazutaka KURIKI ,  Kazuki TANEMURA

IPC: H02J7/00 ,  H01M10/42

Abstract: A secondary battery management system for achieving a secondary battery capable of being used even at low temperatures. The secondary battery management system includes a secondary battery that is charged and discharged at higher than or equal to −50° C. and lower than or equal to 0° C., a first circuit having a function of measuring a voltage of the secondary battery, a second circuit having a function of measuring a current of the secondary battery, and a control circuit to which information on voltage from the first circuit or information on current from the second circuit is input. The control circuit starts charging to the secondary battery. The control circuit performs arithmetic operation of data showing battery characteristics on the basis of a value input from the first circuit or the second circuit. The control circuit detects a local maximum value of the data. The control circuit stops the charging when detecting the local maximum value.

公开(公告)号：US20240113346A1

公开(公告)日：2024-04-04

申请号：US18534217

申请日：2023-12-08

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Junpei MOMO ,  Kazutaka KURIKI ,  Hiromichi GODO ,  Shunpei YAMAZAKI

IPC: H01M10/46 ,  A61N1/378 ,  G06F1/16 ,  H01L21/822 ,  H01L27/06 ,  H01L27/12 ,  H01L29/786 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0562 ,  H01M10/0585 ,  H01M10/42 ,  H01M10/613 ,  H01M10/623 ,  H02J50/20

CPC classification number: H01M10/46 ,  A61N1/378 ,  G06F1/163 ,  H01L21/8221 ,  H01L27/0688 ,  H01L27/1218 ,  H01L27/1225 ,  H01L27/124 ,  H01L27/1251 ,  H01L29/78651 ,  H01L29/7869 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0562 ,  H01M10/0585 ,  H01M10/425 ,  H01M10/613 ,  H01M10/623 ,  H02J50/20 ,  H01M2220/30 ,  H01M2300/0071

Abstract: A semiconductor device in which a circuit and a battery are efficiently stored is provided. In the semiconductor device, a first transistor, a second transistor, and a secondary battery are provided over one substrate. A channel region of the second transistor includes an oxide semiconductor. The secondary battery includes a solid electrolyte, and can be fabricated by a semiconductor manufacturing process. The substrate may be a semiconductor substrate or a flexible substrate. The secondary battery has a function of being wirelessly charged.

公开(公告)号：US20230307634A1

公开(公告)日：2023-09-28

申请号：US18190365

申请日：2023-03-27

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Jo SAITO ,  Kaori OGITA ,  Yohei MOMMA ,  Kazutaka KURIKI ,  Shuhei YOSHITOMI ,  Yasuhiro JINBO ,  Tetsuya KAKEHATA ,  Shunpei YAMAZAKI

IPC: H01M4/525 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/131

CPC classification number: H01M4/525 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/131 ,  H01M2300/004

Abstract: A lithium ion battery having excellent charge characteristics and discharge characteristics even in a low-temperature environment is provided. The lithium ion battery includes a positive electrode active material and an electrolyte. The positive electrode active material contains cobalt, oxygen, magnesium, aluminum, and nickel. The electrolyte contains lithium hexafluorophosphate, ethylene carbonate, ethyl methyl carbonate, and dimethyl carbonate. Second discharge capacity of the lithium ion battery is higher than or equal to 70% of first discharge capacity. The first discharge capacity is obtained by performing first charge and first discharge at 20° C., and the second discharge capacity is obtained by performing second charge and second discharge at −40° C. The first discharge and the second discharge are constant current discharge with 20 mA/g per positive electrode active material weight.

公开(公告)号：US20230238583A1

公开(公告)日：2023-07-27

申请号：US17925357

申请日：2021-05-10

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kaori OGITA ,  Kazutaka KURIKI ,  Yumiko YONEDA ,  Hiroshi KADOMA ,  Kunihiko SUZUKI ,  Yuji IWAKI ,  Shunpei YAMAZAKI

IPC: H01M10/0569 ,  H01M4/583

CPC classification number: H01M10/0569 ,  H01M4/583 ,  H01M2004/028

Abstract: According to one embodiment of the present invention, a secondary battery that can be used at a wide range of temperatures and is less likely to be influenced by an environmental temperature is provided. Furthermore, a secondary battery with high safety is provided. An electrolyte obtained by mixing an acyclic ester having high temperature characteristics with a fluorinated carbonic ester at 5 vol. % or higher, preferably 20 vol. % or higher, is used for the purpose of reducing interface resistance between an electrode and an electrolyte, whereby a secondary battery capable of operating at a wide range of temperatures, specifically, at temperatures higher than or equal to −40° C. and lower than or equal to 150° C., preferably higher than or equal to −40° C. and lower than or equal to 85° C. can be achieved.