公开(公告)号：US20210376319A1

公开(公告)日：2021-12-02

申请号：US17282552

申请日：2019-09-30

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Chihiro SHINODA ,  Takahiro KITAHARA ,  Kazuki HOSODA ,  Yuma ICHINOSE

IPC: H01M4/525 ,  H01M4/36 ,  H01M4/62

Abstract: Provided is a positive electrode structure including a current collector and a positive electrode mixture layer provided on one or each of both sides of the current collector, wherein the positive electrode mixture layer has a thickness of 69 μm or more, the positive electrode mixture layer has a density of 3.0 to 5.0 g/cm3, the positive electrode mixture layer includes a positive electrode active material and a binder, the positive electrode active material includes a lithium-nickel composite oxide, the binder includes a fluorine-containing copolymer, the fluorine-containing copolymer contains a vinylidene fluoride unit and a fluorinated monomer unit (excluding the vinylidene fluoride unit), and the fluorine-containing copolymer has a storage modulus (E′) at 30° C. of 100 to 1,100 MPa and a storage modulus (E′) at 60° C. of 50 to 500 MPa, as measured by dynamic viscoelasticity.

公开(公告)号：US20230052514A1

公开(公告)日：2023-02-16

申请号：US17787043

申请日：2020-12-15

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Takaya YAMADA ,  Kae FUJIWARA ,  Chihiro SHINODA ,  Junpei TERADA

IPC: H01M10/056 ,  H01M4/62

Abstract: The present invention provides an oxide-based solid-state secondary battery which may be enlarged at a low cost and for which production costs are reduced. A binder for a solid-state secondary battery using an oxide-based solid-state electrolyte, wherein the binder contains a vinylidene fluoride unit and a fluorinated monomer unit excluding the vinylidene fluoride unit.

公开(公告)号：US20200067052A1

公开(公告)日：2020-02-27

申请号：US16610591

申请日：2018-03-27

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Takahiro KITAHARA ,  Manabu FUJISAWA ,  Takashi IGUCHI ,  Kazuya ASANO ,  Chihiro SHINODA

IPC: H01M2/16 ,  H01M10/0525 ,  C08F214/22 ,  H01M10/058 ,  C08F214/26

Abstract: A secondary battery separator including a porous substrate and a porous film firmly bonded to each other, the porous film being disposed on or above the porous substrate. The porous film contains a fluorine-containing polymer that contains a polymerized unit based on vinylidene fluoride, a polymerized unit based on tetrafluoroethylene, and a polymerized unit based on a monomer represented by the following formula (2-2): R5R6C═CR7R8CO2Y1  (2-2) wherein R5, R6, and R7 are each independently a hydrogen atom or a C1-C8 hydrocarbon group; R8 is a C1-C8 hydrocarbon group; and Y1 is an inorganic cation and/or an organic cation. Also disclosed is a secondary battery including the secondary battery separator; a positive electrode; a negative electrode; and a non-aqueous electrolyte solution.

公开(公告)号：US20220376261A1

公开(公告)日：2022-11-24

申请号：US17623969

申请日：2020-06-30

Applicant: DAIKIN INDUSTRIES, LTD. ,  MCD Technologies S.a.r.l.

Inventor： Chihiro SHINODA ,  Takahiro KITAHARA ,  Junpei TERADA ,  Mikhail Rudolfovich PREDTECHENSKIY ,  Oleg Filippovich BOBRENOK

IPC: H01M4/62 ,  H01M10/0525

Abstract: A composition for an electrochemical device, the composition containing a single-walled carbon nanotube, a binder and a solvent. The binder contains a fluorine-containing copolymer containing a vinylidene fluoride unit and a fluorinated monomer unit other than the vinylidene fluoride unit, and the content of the vinylidene fluoride unit in the fluorine-containing copolymer is 50.0 mol % or more relative to total monomer units. Also disclosed is a positive electrode mixture including the composition and a positive electrode structure including a current collector and the positive electrode mixture layer provided on one or both sides of the current collector.

公开(公告)号：US20200243862A1

公开(公告)日：2020-07-30

申请号：US16755436

申请日：2018-10-02

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Kazuki HOSODA ,  Takahiro KITAHARA ,  Manabu FUJISAWA ,  Takashi IGUCHI ,  Kazuya ASANO ,  Chihiro SHINODA

IPC: H01M4/62 ,  H01M4/131 ,  H01M10/0525 ,  C08F214/22 ,  C08F214/26 ,  C08F220/04

Abstract: A binder for a secondary battery containing a fluorine-containing polymer (A) and polyvinylidene fluoride (B). The fluorine-containing polymer (A) contains a polymerized unit based on vinylidene fluoride, a polymerized unit based on tetrafluoroethylene, and a polymerized unit based on a monomer (2-2) represented by the following formula (2-2): wherein R5, R6, and R7 are each independently a hydrogen atom or a C1-C8 hydrocarbon group; R8 is a C1-C8 hydrocarbon group; and Y1 is an inorganic cation or an organic cation. Also disclosed is an electrode mixture and an electrode for a secondary battery including the binder, and a secondary battery including the electrode.

公开(公告)号：US20230038930A1

公开(公告)日：2023-02-09

申请号：US17957734

申请日：2022-09-30

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Kanta FUKUSHIMA ,  Yuma ICHINOSE ,  Chihiro SHINODA ,  Shigeaki YAMAZAKI

IPC: H01M4/62 ,  H01M4/505 ,  H01M4/525 ,  H01M4/131

Abstract: Provided is an electrode mixture containing a lithium-containing transition metal oxide; a conductive additive; a binder; and an organic solvent, wherein the conductive additive comprises at least one nanocarbon material selected from the group consisting of a multilayer carbon nanotube, a carbon nanohorn, a carbon nanofiber, a fullerene, and a graphene, the binder comprises a fluorine-containing copolymer comprising vinylidene fluoride unit and a fluorinated monomer unit, provided that vinylidene fluoride unit is excluded from the fluorinated monomer unit, and a content of vinylidene fluoride unit in the fluorine-containing copolymer is more than 50 mol % and 99 mol % or less with respect to all monomer units.

公开(公告)号：US20190296359A1

公开(公告)日：2019-09-26

申请号：US16301597

申请日：2017-09-27

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Kazuya ASANO ,  Takashi IGUCHI ,  Manabu FUJISAWA ,  Chihiro SHINODA ,  Tomoyuki GOTO ,  Kazuki HOSODA ,  Takahiro KITAHARA

IPC: H01M4/62 ,  C08F214/22

Abstract: A binder and an electrode mixture for a secondary battery. The binder contains a fluorine-containing polymer containing a polymerized unit based on vinylidene fluoride, a polymerized unit based on tetrafluoroethylene, and a polymerized unit based on a monomer (2-2) represented by the following formula (2-2): R5R6C═CR7R8CO2Y1  (2-2) wherein R5, R6, and R7 are each independently a hydrogen atom or a C1-C8 hydrocarbon group; R8 is a C1-C8 hydrocarbon group; and Y1 is an inorganic cation and/or an organic cation.