公开(公告)号：US11742489B2

公开(公告)日：2023-08-29

申请号：US16958151

申请日：2018-12-14

Applicant: ZEON CORPORATION

Inventor： Kenya Sonobe ,  Hiroki Oguro ,  Maki Mesuda

IPC: H01M4/62 ,  H01M4/139 ,  H01M4/36 ,  H01M10/0525 ,  C08F220/18 ,  C08F236/10 ,  C08F236/12 ,  H01M4/02

CPC classification number: H01M4/622 ,  C08F220/18 ,  C08F236/10 ,  C08F236/12 ,  H01M4/139 ,  H01M4/36 ,  H01M4/364 ,  H01M10/0525 ,  H01M2004/028

Abstract: A binder composition for a secondary battery positive electrode contains a polymer including a nitrile group-containing monomer unit, an aromatic vinyl monomer unit, a hydrophilic group-containing monomer unit, a conjugated diene monomer unit, and a linear alkylene structural unit having a carbon number of 4 or more. The aromatic vinyl monomer unit is included in the polymer in a proportion of not less than 30.0 mass % and not more than 60.0 mass %. The polymer has an iodine value of not less than 60 mg/100 mg and not more than 150 mg/100 mg.

公开(公告)号：US11462740B2

公开(公告)日：2022-10-04

申请号：US16765870

申请日：2018-11-29

Applicant: ZEON CORPORATION

Inventor： Shinsuke Sugawara ,  Maki Mesuda ,  Tomoya Murase

IPC: H01M4/62 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/02

Abstract: A conductive material paste for an electrochemical device contains a conductive material, an imidazole compound represented by the following formula (I), a binder, and an organic solvent. In formula (I), X1 and X2 are each hydrogen or a monovalent organic group that optionally forms a ring structure, and X3 and X4 are each hydrogen or an independent monovalent organic group.

公开(公告)号：US12212002B2

公开(公告)日：2025-01-28

申请号：US16973037

申请日：2019-06-24

Applicant: ZEON CORPORATION

Inventor： Maki Mesuda ,  Yukie Ito

IPC: H01M4/62 ,  C08L33/08 ,  C08L33/10 ,  C08L33/20 ,  H01M10/0525

Abstract: Provided is a binder composition for an electrochemical device electrode with which it is possible to form an electrode mixed material layer that has excellent peel strength and dusting resistance and that can cause an electrochemical device to display excellent rate characteristics. The binder composition for an electrochemical device electrode contains a binder and an organic solvent. The binder includes a particulate polymer A and a polymer B. The particulate polymer A has a core-shell structure including a core portion and a shell portion at least partially covering an outer surface of the core portion, and a polymer forming the shell portion has a glass-transition temperature of −50° C. to 20° C. A mixture obtained by mixing the polymer B in a concentration of 8 mass % with the organic solvent has a viscosity at a shear rate of 1 s−1 of 100 mPa·s to 10,000 mPa·s.

公开(公告)号：US11245115B2

公开(公告)日：2022-02-08

申请号：US16634858

申请日：2018-08-09

Applicant: ZEON CORPORATION

Inventor： Kenya Sonobe ,  Takafumi Sekimoto ,  Maki Mesuda ,  Hiroki Oguro

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/136 ,  C08F220/18

Abstract: A binder composition for a non-aqueous secondary battery electrode contains an organic solvent and a binder that includes a polymer A including an ethylenically unsaturated acid monomer unit in a proportion of not less than 1.00 mass % and not more than 10.00 mass %. The polymer A has a viscosity of 10,000 mPa·s or less at a shear rate of 0.1 s−1 when mixed with the organic solvent in a concentration of 8 mass % to obtain a mixture.

公开(公告)号：US11929507B2

公开(公告)日：2024-03-12

申请号：US17251814

申请日：2019-06-27

Applicant: ZEON CORPORATION

Inventor： Yukie Ito ,  Kenya Sonobe ,  Maki Mesuda

IPC: H01M4/62 ,  C08F220/14 ,  C08L25/12 ,  C08L33/20 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/622 ,  C08F220/14 ,  C08L25/12 ,  C08L33/20 ,  H01M10/0525 ,  C08F2800/20 ,  H01M2004/021

Abstract: A binder composition contains an organic solvent and a binder that includes a particulate polymer A and a highly soluble polymer B. The particulate polymer A includes an ethylenically unsaturated acid monomer unit in a proportion of not less than 1.0 mass % and not more than 10.0 mass % and a (meth)acrylic acid ester monomer unit in a proportion of not less than 30.0 mass % and not more than 98.0 mass %. The particulate polymer A includes two particulate polymers A1 and A2 having different volume-average particle diameters. The volume-average particle diameters D50A1 and D50A2 of these particulate polymers A1 and A2 satisfy a formula: D50A2>D50A1≥50 nm.

公开(公告)号：US11046797B2

公开(公告)日：2021-06-29

申请号：US16082677

申请日：2017-03-24

Applicant: ZEON CORPORATION

Inventor： Kunihiro Goto ,  Maki Mesuda ,  Koji Annaka ,  Takuya Ishii

IPC: H01M4/13 ,  H01M4/62 ,  C08F220/48 ,  H01G11/38 ,  C08F220/44 ,  H01M4/139 ,  C08F220/46 ,  H01G11/30 ,  H01M10/0525

Abstract: A disclosed binder composition comprises a copolymer which comprises a nitrile group-containing monomer unit, an acidic group-containing monomer unit and a basic group-containing monomer unit, wherein the proportion of the nitrile group-containing monomer unit in the copolymer is 70.0 mol % or more and 99.0 mol % or less, and wherein the total proportion of the acidic group-containing monomer unit and the basic group-containing monomer unit in the copolymer is 0.8 mol % or more and 10.0 mol % or less.

公开(公告)号：US12191494B2

公开(公告)日：2025-01-07

申请号：US17597048

申请日：2020-06-17

Applicant: ZEON CORPORATION

Inventor： Maki Mesuda ,  Kenya Sonobe ,  Yasuhiro Isshiki

IPC: H01M4/62 ,  H01M4/525 ,  H01M10/0525

Abstract: Provided is a novel technique relating to electrochemical devices that makes it possible to ensure a high level of safety of an electrochemical device while also causing the electrochemical device to display excellent high-temperature storage characteristics. One or more composite particles for an electrochemical device each include a core particle and a shell portion at least partially covering an outer surface of the core particle. The core particle contains a melamine compound, and the shell portion contains an inorganic material.

公开(公告)号：US12021215B2

公开(公告)日：2024-06-25

申请号：US17279758

申请日：2019-10-03

Applicant: ZEON CORPORATION

Inventor： Kenya Sonobe ,  Yasuhiro Isshiki ,  Maki Mesuda

IPC: H01M4/36 ,  H01M4/04

CPC classification number: H01M4/0416 ,  H01M4/364

Abstract: A conductive paste for an electrode mixed material layer has a water content of 1,000 ppm or less. The paste contains a conductive additive, not less than 3 parts by mass and not more than 200 parts by mass of a polymer per 100 parts by mass of the conductive additive, and not less than 12 parts by mass and not more than 350 parts by mass of expandable particles per 100 parts by mass of the conductive additive. The polymer includes at least one functional group selected from the group consisting of a carboxyl group, a hydroxyl group, an amino group, an epoxy group, an oxazoline group, a sulfo group, a nitrile group, an ester group, and an amide group. The expandable particles have an initial thermal decomposition temperature of not lower than 120° C. and not higher than 400° C.