公开(公告)号：US20240332519A1

公开(公告)日：2024-10-03

申请号：US18578002

申请日：2022-07-14

Applicant: ZEON CORPORATION

Inventor： Hiroki OSHIMA

IPC: H01M4/38 ,  H01M4/02 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/386 ,  H01M4/622 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/027

Abstract: Provided is a conductive material paste for a non-aqueous electrolyte solution secondary battery that maintains paste dispersibility and that enables the provision of a slurry composition for a non-aqueous electrolyte solution secondary battery negative electrode in which slurry viscosity stability is maintained while also being capable of providing a non-aqueous electrolyte solution secondary battery having a suppressed rate of resistance increase in a high-temperature storage test. The conductive material paste for a non-aqueous electrolyte solution secondary battery contains carbon nanotubes (A), a dispersant (B), a dispersant (C), and water. The dispersant (B) is a copolymer including at least an unsaturated carboxylic acid monomer unit and a (meth)acrylamide group-containing monomer unit. The dispersant (C) is a thiazoline or derivative thereof.

公开(公告)号：US20230282832A1

公开(公告)日：2023-09-07

申请号：US18006872

申请日：2021-08-27

Applicant: ZEON CORPORATION

Inventor： Taku MATSUMURA ,  Keiichiro TANAKA ,  Hiroki OSHIMA

IPC: H01M4/62

CPC classification number: H01M4/622 ,  H01M2004/021

Abstract: Provided is a binder composition for a non-aqueous secondary battery electrode that can form an electrode for a non-aqueous secondary battery having excellent moisture resistance. The binder composition for a non-aqueous secondary battery electrode contains phenolic compound particles and a particulate polymer formed of a graft polymer that includes an acidic graft chain and that is obtained through a graft polymerization reaction of an acidic group-containing monomer and/or macromonomer with core particles containing a block copolymer that includes an aromatic vinyl block region formed of an aromatic vinyl monomer unit and an aliphatic conjugated diene block region formed of an aliphatic conjugated diene monomer unit.

公开(公告)号：US20240429394A1

公开(公告)日：2024-12-26

申请号：US18703361

申请日：2022-11-22

Applicant: ZEON CORPORATION

Inventor： Hiroki OSHIMA ,  Norikazu YAMAMOTO

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/38 ,  H01M10/0525

Abstract: Provided is a conductive material paste for a non-aqueous electrolyte solution secondary battery that is capable of providing a non-aqueous electrolyte solution secondary battery having excellent electrolyte solution injectability, low-temperature characteristics, and cycle characteristics. The conductive material paste for a non-aqueous electrolyte solution secondary battery contains carbon nanotubes, acidic group-containing cellulose nanofibers, and water. A mass ratio of the acidic group-containing cellulose nanofibers relative to the carbon nanotubes (acidic group-containing cellulose nanofibers/carbon nanotubes) is not less than 0.3 and not more than 4.

公开(公告)号：US20220336815A1

公开(公告)日：2022-10-20

申请号：US17753835

申请日：2020-09-14

Applicant: ZEON CORPORATION

Inventor： Hiroki OSHIMA ,  Yusuke ADACHI

IPC: H01M4/62 ,  C08L29/04

Abstract: Provided is a binder composition for a secondary battery with which it is possible to produce a slurry composition for a secondary battery electrode that has excellent preservation stability and can produce an electrode having excellent peel strength. The binder composition for a secondary battery contains a water-soluble polymer and polyvalent metal ions. The water-soluble polymer includes a vinyl alcohol structural unit and a carboxy group-containing monomer unit. The content of the polyvalent metal ions is not less than 0.1 mass ppm and not more than 10,000 mass ppm relative to the water-soluble polymer.

公开(公告)号：US20240021824A1

公开(公告)日：2024-01-18

申请号：US18253039

申请日：2021-11-29

Applicant: ZEON CORPORATION

Inventor： Hiroki OSHIMA ,  Masayo SONO

IPC: H01M4/62 ,  H01M4/13 ,  C08F299/00 ,  C08L53/02

CPC classification number: H01M4/622 ,  H01M4/13 ,  C08F299/00 ,  C08L53/02 ,  C08L2201/56 ,  C08L2203/20

Abstract: A binder composition for a non-aqueous secondary battery electrode contains water and a polymer that includes an aromatic vinyl monomer unit, a conjugated diene monomer unit, and a hydrophilic monomer unit. The polymer has a median diameter of not less than 50 nm and not more than 800 nm, and the proportional content of the hydrophilic monomer unit in the polymer is not less than 4.0 mass % and not more than 20 mass %. Moreover, the polymer has a loss tangent tan δ of not less than 0.001 and less than 0.40 and a loss modulus G″ of 1,600 kPa or less.

公开(公告)号：US20230133447A1

公开(公告)日：2023-05-04

申请号：US17906260

申请日：2021-03-22

Applicant: ZEON CORPORATION

Inventor： Hiroki OSHIMA ,  Yusuke ADACHI

IPC: H01M4/62 ,  H01M10/0525

Abstract: Provided is a binder composition that can result in high peel strength in an electrode and excellent cycle characteristics in a secondary battery. A binder composition for a non-aqueous secondary battery contains a water-soluble polymer (A) and a water-soluble polymer (B). The water-soluble polymer (A) is formed of one or more types of units selected from the group consisting of unsaturated carboxylic acid monomer units, unsaturated carboxylic acid amide monomer units, unsaturated carboxylic acid ester monomer units, hydroxyl group-containing vinyl monomer units, and vinyl alcohol structural units, and includes a predetermined amount of unsaturated carboxylic acid monomer units. The water-soluble polymer (B) is formed of one or more types of ethylenically unsaturated monomer units, and includes a predetermined amount of sulfo group-containing aromatic vinyl monomer units. The weight-average molecular weight of the water-soluble polymer (A) is 4 times or more the weight-average molecular weight of the water-soluble polymer (B).

公开(公告)号：US20250087697A1

公开(公告)日：2025-03-13

申请号：US18727207

申请日：2023-01-19

Applicant: ZEON CORPORATION

Inventor： Kohei IJIRO ,  Hiroki OSHIMA

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/38 ,  H01M4/66

Abstract: Provided is a CNT dispersion liquid having excellent CNT dispersibility and storage stability. The carbon nanotube dispersion liquid contains carbon nanotubes, a water-soluble polymer including an acid functional group, and water. An HSP distance (Ra) between Hansen solubility parameters (HSPc) of the carbon nanotubes and Hansen solubility parameters (HSPd) of the water-soluble polymer is 7.0 MPa1/2 or less.

公开(公告)号：US20250087695A1

公开(公告)日：2025-03-13

申请号：US18685229

申请日：2022-09-12

Applicant: ZEON CORPORATION

Inventor： Norikazu YAMAMOTO ,  Hiroki OSHIMA

IPC: H01M4/62 ,  C08F236/08 ,  H01M4/02 ,  H01M4/13 ,  H01M10/42

Abstract: Provided is a conductive material paste for a non-aqueous secondary battery with which it is possible to form an electrode that has suppressed dusting and that can cause a non-aqueous secondary battery to display excellent cycle characteristics. The conductive material paste contains carbon nanotubes, a dispersant, and water. The dispersant includes a water-soluble polymer including a conjugated diene monomer unit and a carboxy group-containing monomer unit.