公开(公告)号：US20210143404A1

公开(公告)日：2021-05-13

申请号：US17086959

申请日：2020-11-02

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Mayumi MIKAMI ,  Kazuhei NARITA ,  Teruaki OCHIAI ,  Yumiko YONEDA

IPC: H01M4/1397 ,  H01M4/04 ,  H01M4/62 ,  H01M4/58 ,  H01M10/0525 ,  H01M4/136

Abstract: A method for manufacturing a lithium-ion secondary battery more safely at a lower cost is provided. A method for manufacturing a positive electrode for a secondary battery includes a step of forming slurry by mixing graphene oxide, a binder, and a positive electrode active material in a solvent containing water; a step of applying the slurry on a positive electrode current collector; and a step of reducing graphene oxide by at least one of chemical reduction and thermal reduction. As a reducing agent for the chemical reduction, ascorbic acid can be used.

公开(公告)号：US20210083281A1

公开(公告)日：2021-03-18

申请号：US16611791

申请日：2018-05-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Mayumi MIKAMI ,  Aya UCHIDA ,  Yumiko YONEDA ,  Yohei MOMMA ,  Masahiro TAKAHASHI ,  Teruaki OCHIAI

IPC: H01M4/525 ,  H01M4/131 ,  H01M4/134 ,  H01M4/133 ,  H01M4/505 ,  H01M4/36 ,  H01M4/139 ,  H01M10/0525 ,  C01G53/00

Abstract: A positive electrode active material having high capacity and excellent cycle performance is provided. The positive electrode active material has a small difference in a crystal structure between the charged state and the discharged state. For example, the crystal structure and volume of the positive electrode active material, which has a layered rock-salt crystal structure in the discharged state and a pseudo-spinel crystal structure in the charged state at a high voltage of approximately 4.6 V, are less likely to be changed by charge and discharge as compared with those of a known positive electrode active material.

公开(公告)号：US20200234893A1

公开(公告)日：2020-07-23

申请号：US16840659

申请日：2020-04-06

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Yumiko SAITO ,  Rie YOKOI ,  Mayumi MIKAMI

IPC: H01G11/48 ,  H01M4/66 ,  H01M4/13 ,  H01M10/0525 ,  H01M4/60 ,  H01M4/36 ,  H01M4/1399 ,  H01M4/1391 ,  H01M4/137 ,  H01M4/131 ,  H01M4/04 ,  H01G11/62 ,  H01G11/52 ,  H01G11/32 ,  H01M4/48 ,  H01G11/30 ,  H01G11/50 ,  H01M4/38

Abstract: A mixture of amorphous PAHs and at least one of a carrier ion storage metal, a Sn compound, a carrier ion storage alloy, a metal compound, Si, Sb, and SiO2 is used as the negative electrode active material. The theoretical capacity of amorphous PAHs greatly exceeds that of a graphite based carbon material. Thus, the use of amorphous PAHs enables the negative electrode active material to have a higher capacity than in the case of using the graphite-based carbon material. Further, addition of at least one of the carrier ion storage metal, the Sn compound, the carrier ion storage alloy, the metal compound, Si, Sb, and SiO2 to the amorphous PAHs enables the negative electrode active material to have a higher capacity than the case of only using the amorphous PAHs.

公开(公告)号：US20180145368A1

公开(公告)日：2018-05-24

申请号：US15810989

申请日：2017-11-13

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Teruaki OCHIAI ,  Takahiro KAWAKAMI ,  Mayumi MIKAMI ,  Yohei MOMMA ,  Ayae TSURUTA ,  Masahiro TAKAHASHI

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

CPC classification number: H01M10/0525 ,  H01M4/02 ,  H01M4/366 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/028 ,  Y02E60/13

Abstract: Positive electrode active material particles that inhibit a decrease in capacity due to charge and discharge cycles are provided. A high-capacity secondary battery, a secondary battery with excellent charge and discharge characteristics, or a highly-safe or highly-reliable secondary battery is provided. A novel material, active material particles, and a storage device are provided. The positive electrode active material particle includes a first region and a second region in contact with the outside of the first region. The first region contains lithium, oxygen, and an element M that is one or more elements selected from cobalt, manganese, and nickel. The second region contains the element M, oxygen, magnesium, and fluorine. The atomic ratio of lithium to the element M (Li/M) measured by X-ray photoelectron spectroscopy is 0.5 or more and 0.85 or less. The atomic ratio of magnesium to the element M (Mg/M) is 0.2 or more and 0.5 or less.

公开(公告)号：US20150155556A1

公开(公告)日：2015-06-04

申请号：US14553674

申请日：2014-11-25

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takahiro KAWAKAMI ,  Mayumi MIKAMI ,  Shunsuke ADACHI ,  Shuhei YOSHITOMI ,  Teruaki OCHIAI ,  Yumiko YONEDA (Former: SAITO) ,  Yohei MOMMA ,  Satoshi SEO

IPC: H01M4/505 ,  H01M4/525

CPC classification number: H01M4/505 ,  C01G45/1228 ,  C01G53/50 ,  C01P2002/80 ,  C01P2002/85 ,  C01P2002/89 ,  C01P2004/04 ,  H01M4/366 ,  H01M4/525 ,  H01M4/5825

Abstract: To increase the amount of lithium ions that can be received in and released from a positive electrode active material to achieve high capacity and high energy density of a secondary battery. A lithium manganese oxide particle includes a first region and a second region. The valence number of manganese in the first region is lower than the valence number of manganese in the second region. The lithium manganese oxide has high structural stability and high capacity characteristics.

Abstract translation: 为了增加可以从正极活性物质接收和释放的锂离子的量，以实现二次电池的高容量和高能量密度。 锂锰氧化物颗粒包括第一区域和第二区域。 第一区域中的锰的价数低于第二区域中的锰的价数。 锂锰氧化物具有高结构稳定性和高容量特性。

公开(公告)号：US20250065776A1

公开(公告)日：2025-02-27

申请号：US18551561

申请日：2022-03-11

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Takeshi OSADA ,  Noboru INOUE ,  Haruki KATAGIRI ,  Yosuke TSUKAMOTO ,  Mayumi MIKAMI ,  Kazuki TANEMURA ,  Kousuke SASAKI

IPC: B60L58/22 ,  B60L50/60 ,  B60L58/12 ,  G07C5/00 ,  H01M10/42 ,  H01M50/209 ,  H01M50/211 ,  H01M50/213 ,  H02J7/00

Abstract: A system is provided with which data on the internal state of a storage battery such as SOC-OCV characteristics and FCC can be obtained with high accuracy and highly accurate estimation is possible even in the case of repeating charging and discharging for a long period. The storage battery management system includes a vehicle that includes a unit enabling data transmission and reception; the vehicle includes a storage battery, a balancing circuit electrically connected to the storage battery, and a vehicle control unit having a function of controlling the balancing circuit; the storage battery includes an assembled battery including a plurality of battery cells; the vehicle control unit has a function of selecting an estimated value that most closely shows a state of each of the battery cells included in the assembled battery; and the balancing circuit has a function of being controlled in accordance with the selected estimated value.

公开(公告)号：US20250046799A1

公开(公告)日：2025-02-06

申请号：US18826241

申请日：2024-09-06

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 ,  H01G11/06 ,  H01G11/28 ,  H01G11/30 ,  H01G11/36 ,  H01G11/50 ,  H01M4/134 ,  H01M4/38 ,  H01M4/62 ,  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：US20250015263A1

公开(公告)日：2025-01-09

申请号：US18763866

申请日：2024-07-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Atsushi KAWATSUKI ,  Naoto OKUZAWA ,  Mayumi MIKAMI ,  Yohei MOMMA

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/58 ,  H01M4/60

Abstract: One embodiment of the present invention is to provide a high-capacity lithium ion secondary battery and a production method thereof. To perform surface modification, a spherical resin is subjected to first heat treatment at a temperature higher than or equal to 500° C. in an inert atmosphere. By the heating, the contraction of a particle, the void formation due to a gas release from an inside of the particle, the crack on a particle surface, and the like are caused so as to form a support for sulfur that is to be mixed later. Obtained spherical particles and sulfur powder are mixed and then stored in a container. The mixture in the container is subjected to second heat treatment at a temperature higher than or equal to 120° C. without being exposed to outside air.

公开(公告)号：US20240266594A1

公开(公告)日：2024-08-08

申请号：US18562562

申请日：2022-05-24

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shuhei YOSHITOMI ,  Kaori OGITA ,  Shotaro MURATSUBAKI ,  Atsushi KAWATSUKI ,  Mayumi MIKAMI ,  Yohei MOMMA ,  Tetsuya KAKEHATA ,  Shunpei YAMAZAKI

IPC: H01M10/0562 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0525

CPC classification number: H01M10/0562 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/30

Abstract: Provided is a secondary battery having a favorable interface contact between an active material and an electrolyte. The secondary battery includes a positive electrode layer, a negative electrode layer, and an electrolyte layer positioned between the positive electrode layer and the negative electrode layer. The positive electrode layer contains a positive electrode active material and a first solid electrolyte, the negative electrode layer contains a negative electrode active material and a second solid electrolyte, the electrolyte layer contains a third solid electrolyte and an ionic liquid, and a space in the third solid electrolyte is impregnated with the ionic liquid. The secondary battery is bendable.

公开(公告)号：US20240063387A1

公开(公告)日：2024-02-22

申请号：US18449140

申请日：2023-08-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Tetsuya KAKEHATA ,  Shuhei YOSHITOMI ,  Yohei MOMMA ,  Atsushi KAWATSUKI ,  Mayumi MIKAMI ,  Junya MARUYAMA ,  Akio ENDO ,  Kaori OGITA

IPC: H01M4/525 ,  C01G51/00 ,  H01M50/109 ,  H01M4/62 ,  H01M4/66 ,  H01M50/417

CPC classification number: H01M4/525 ,  C01G51/42 ,  H01M50/109 ,  H01M4/625 ,  H01M4/623 ,  H01M4/661 ,  H01M50/417 ,  C01P2002/52 ,  C01P2006/40 ,  C01P2004/61 ,  C01P2004/04 ,  C01P2002/90 ,  C01P2002/77 ,  C01P2002/72

Abstract: A positive electrode active material having a high charge-discharge capacity and high safety and a secondary battery including the positive electrode active material are provided. The positive electrode active material includes lithium, a transition metal M, an additive element, and oxygen. The powder volume resistivity of the positive electrode active material is higher than or equal to 1.0×105 Ω·cm at a temperature of higher than or equal to 180° C. and lower than or equal to 200° C. and at a pressure of higher than or equal to 0.3 MPa and lower than or equal to 2 MPa. The median diameter of the positive electrode active material is preferably greater than or equal to 3 μm and less than or equal to 10 μm.