公开(公告)号：US20240279442A1

公开(公告)日：2024-08-22

申请号：US18566762

申请日：2022-06-16

Applicant: ZEON CORPORATION

Inventor： Akito NAKAI ,  Naoki TAKAHASHI

IPC: C08L9/02 ,  C08F220/28 ,  C08F236/12 ,  C08K7/06 ,  C08L33/14 ,  H01M4/62

CPC classification number: C08L9/02 ,  C08F220/286 ,  C08F236/12 ,  C08K7/06 ,  C08L33/14 ,  H01M4/623 ,  C08K2201/001

Abstract: Provided is a binder composition that is capable of producing a conductive material dispersion liquid having excellent dispersibility and that can cause an electrochemical device to display excellent cycle characteristics. The binder composition contains a first polymer, a second polymer, and an organic solvent. The first polymer includes a nitrile group-containing monomer unit and includes either or both of an aliphatic conjugated diene monomer unit and an alkylene structural unit. The second polymer includes a structural unit of the following formula (I) in a proportion of 70 mass % to 95 mass %. In formula (I), R1 represents a hydrogen atom or a methyl group, R2 represents a hydrogen atom, a phenyl group, an alkyl group having a carbon number of 1 to 6, or a phenyl group including one to three alkyl groups having a carbon number of 1 to 6, and n represents an integer of 3 or more.

公开(公告)号：US20240047755A1

公开(公告)日：2024-02-08

申请号：US18257657

申请日：2022-01-06

Applicant: ZEON CORPORATION

Inventor： Naoki TAKAHASHI

IPC: H01M10/0569 ,  H01M4/62

CPC classification number: H01M10/0569 ,  H01M4/623 ,  H01M4/625 ,  H01M2004/028

Abstract: Provided is a non-aqueous electrochemical device having reduced direct current resistance at low temperature and excellent high-temperature storage characteristics. The electrochemical device includes a positive electrode, a negative electrode, a separator, and an electrolyte solution. The positive electrode includes a positive electrode mixed material layer containing a positive electrode active material, a conductive material, and a binder for a positive electrode. The binder for a positive electrode includes a polymer A that includes a nitrile group-containing monomer unit and an alkylene structural unit. The electrolyte solution contains a non-halogenated carbonate solvent and an ester solvent indicated by formula (I): R1—C(═O)—O—R2. In formula (I), R1 and R2 each represent, independently of each other, a chain alkyl group having a carbon number of 2 or more.

公开(公告)号：US20230268513A1

公开(公告)日：2023-08-24

申请号：US18040149

申请日：2021-08-24

Applicant: ZEON CORPORATION

Inventor： Akito NAKAI ,  Naoki TAKAHASHI

IPC: H01M4/62 ,  C08K5/02 ,  C08F236/12

CPC classification number: H01M4/622 ,  H01M4/625 ,  C08K5/02 ,  C08F236/12

Abstract: Provided is a binder composition for an electrochemical device that has excellent viscosity stability and is capable of forming an electrode having excellent peel strength. The binder composition contains a polymer including a nitrile group-containing monomer unit, N-methyl-2-pyrrolidone, and a halogenated hydrocarbon. The content of the halogenated hydrocarbon is not less than 2 mass ppm and not more than 400 mass ppm relative to the content of the polymer.

公开(公告)号：US20230420681A1

公开(公告)日：2023-12-28

申请号：US18252720

申请日：2021-11-17

Applicant: ZEON CORPORATION

Inventor： Yukie ITO ,  Naoki TAKAHASHI

IPC: H01M4/62 ,  H01G11/36 ,  H01G11/38 ,  H01M4/02

CPC classification number: H01M4/622 ,  H01M4/623 ,  H01G11/36 ,  H01M4/625 ,  H01G11/38 ,  H01M2004/021 ,  H01M2004/028

Abstract: A paste for an electrochemical device contains a conductive material, a polymer A, and a dispersion medium. The conductive material includes a fibrous conductive material and is contained in the paste in a proportion of more than 2 mass %. The polymer A includes a nitrile group-containing monomer unit and an alkylene structural unit and has a Mooney viscosity (ML1+4, 100° C.) of not less than 70 and not more than 150. The paste contains the polymer A in a proportion of more than 50 parts by mass and not more than 200 parts by mass per 100 parts by mass of the conductive material.

公开(公告)号：US20230317949A1

公开(公告)日：2023-10-05

申请号：US18005670

申请日：2021-08-02

Applicant: ZEON CORPORATION

Inventor： Naoki TAKAHASHI

IPC: H01M4/62 ,  H01M4/133 ,  C08F236/12 ,  C08K3/30

CPC classification number: H01M4/622 ,  C08F236/12 ,  C08K3/30 ,  H01M4/133 ,  H01M4/625 ,  C08F2810/00 ,  C08K2003/3081

Abstract: Provided is a binder composition for an electrochemical device that can stably disperse a conductive carbon material and that can cause an electrochemical device to display excellent output characteristics and high-voltage cycle characteristics. The binder composition for an electrochemical device contains a polymer including a nitrile group-containing monomer unit and an alkylene structural unit and a group 13 element and satisfies a relationship formula: 0.1 ≤ M/I ≤ 150 (in the formula, I is the iodine value [g/100 g] of the polymer and M is the concentration [ppm] of the group 13 element).

公开(公告)号：US20230129636A1

公开(公告)日：2023-04-27

申请号：US17906263

申请日：2021-03-16

Applicant: ZEON CORPORATION

Inventor： Naoki TAKAHASHI

IPC: H01M4/62 ,  H01M10/0525

Abstract: Provided is a conductive material dispersion liquid that can reduce internal resistance of a secondary battery while also ensuring good high-temperature storage characteristics of the secondary battery. The conductive material dispersion liquid contains a carbon material, a dispersant, and a dispersion medium. An HSP distance (Rd) of Hansen solubility parameters (HSPc) of the carbon material and Hansen solubility parameters (HSPd) of the dispersant is 10.0 MPa1/2 or less.

公开(公告)号：US20210005894A1

公开(公告)日：2021-01-07

申请号：US16979519

申请日：2019-03-18

Applicant: ZEON CORPORATION

Inventor： Tomoya MURASE ,  Naoki TAKAHASHI ,  Shinsuke SUGAWARA

IPC: H01M4/62 ,  H01M4/60 ,  H01M4/88 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/36 ,  H01M10/0525 ,  C01B32/174

Abstract: Disclosed is a carbon nanotube dispersion liquid containing carbon nanotubes, a binder, and a dispersion medium. The binder includes a polymer (A) containing an aromatic vinyl monomer unit and a linear alkylene structural unit having a carbon number of at least 4. The proportion of the binder in the carbon nanotube dispersion liquid is 30 mass % or less, and the viscosity change rate of the carbon nanotube dispersion liquid as measured under predetermined conditions before and after leaving the carbon nanotube dispersion liquid for 1 week is 50% or more and 300% or less.

公开(公告)号：US20180358625A1

公开(公告)日：2018-12-13

申请号：US15775103

申请日：2016-11-09

Applicant: ZEON CORPORATION

Inventor： Hiroki OGURO ,  Kouichirou MAEDA ,  Naoki TAKAHASHI

IPC: H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/622 ,  H01M4/13 ,  H01M10/0525

Abstract: It is an object of the present disclosure to provide an electrode for lithium ion secondary battery-use that can efficiently prevent a temperature increase by reducing current through an increase in the battery internal resistance during abnormal overheating. The electrode for lithium ion secondary battery-use of the present disclosure comprises a binder composition containing particles formed by a second component being located substantially on a portion of the outside of particles comprising a first component. The initial adhesive force of the binder composition is at least 1. The storage elastic modulus of the binder composition at 150° C. is no greater than 1,000 Pa.

公开(公告)号：US20180183064A1

公开(公告)日：2018-06-28

申请号：US15736045

申请日：2016-06-28

Applicant: ZEON CORPORATION

Inventor： Naoki TAKAHASHI

IPC: H01M4/62 ,  C08F236/06 ,  C08K3/04 ,  C08K3/22 ,  C08L47/00 ,  C08F220/44 ,  C08L27/16 ,  H01M4/525 ,  H01M4/131 ,  H01M10/0525

CPC classification number: H01M4/622 ,  C08F8/04 ,  C08F220/42 ,  C08F220/44 ,  C08F236/04 ,  C08F236/06 ,  C08F2500/17 ,  C08F2800/20 ,  C08K3/00 ,  C08K3/04 ,  C08K3/22 ,  C08K2003/2293 ,  C08K2201/001 ,  C08L27/16 ,  C08L33/18 ,  C08L47/00 ,  C08L2203/20 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/525 ,  H01M10/0525

Abstract: Provided is a binder composition for a secondary battery electrode that, when used in production of a slurry composition for a secondary battery electrode, enables favorable dispersion of an electrode active material and a conductive material in high concentration while ensuring coatability. The binder composition for a secondary battery electrode contains a binder. The binder includes a copolymer that includes an alkylene structural unit and a nitrile group-containing monomer unit, and that has a Mooney viscosity (ML1+4, 100° C.) of at least 50 and not more than 200.