公开(公告)号：US11063260B2

公开(公告)日：2021-07-13

申请号：US16068824

申请日：2016-12-28

Applicant: SHOWA DENKO K.K.

Inventor： Mitsuru Hanasaki ,  Tomonori Kurata ,  Junya Uchiyashiki ,  Yasuhiro Nakagawa

IPC: H01M4/62 ,  C08F212/08 ,  H01M4/139 ,  H01M4/13 ,  H01M4/04 ,  H01M4/02 ,  H01M4/1393 ,  C08F212/34 ,  C08F236/06 ,  H01M10/0525 ,  C08K5/5435 ,  C08L25/14 ,  C08K5/544

Abstract: An aqueous binder composition for a secondary battery electrode containing a silane coupling agent without ethylenically unsaturated bonds, a resin which is a polymer of at least one kind of ethylenically unsaturated monomers, a resin which is a polymer of at least one kind of ethylenically unsaturated monomer, and at least one kind of solvent selected from water and a hydrophilic solvent. The amount of silane coupling agent is from 0.5 to 9 parts by mass based on 100 parts by mass of ethylenically unsaturated monomer. The pH of the composition is 2.5 to 8.0. Also disclosed is a binder obtained by curing the aqueous binder composition, a slurry containing the aqueous binder composition and an active material, a secondary battery electrode obtained by curing the slurry, and a secondary battery including the secondary battery electrode.

公开(公告)号：US10811686B2

公开(公告)日：2020-10-20

申请号：US15750860

申请日：2016-08-03

Applicant: SHOWA DENKO K.K.

Inventor： Yusuke Aoki ,  Mitsuru Hanasaki

IPC: H01M4/62 ,  H01M4/139 ,  H01M4/13 ,  C08L71/02 ,  C08F220/04 ,  C08L31/06 ,  C08F220/28 ,  C09D5/24 ,  C09D101/10 ,  C09D171/02 ,  H01M4/04 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M10/0525 ,  H01M10/052 ,  H01M10/058 ,  H01M4/02

Abstract: A slurry for a positive electrode of a lithium-ion secondary battery. Also disclosed is a positive electrode for a lithium-ion secondary battery obtained using the slurry for a positive electrode of a lithium-ion secondary battery, and a production method for the electrode; and a lithium-ion secondary battery provided with the positive electrode for a lithium-ion secondary battery, and a production method for the battery. The slurry for a positive electrode of a lithium-ion secondary battery includes a positive electrode active material (A), a conductive auxiliary agent (B), a resin binder (C), a thickening dispersant (D), and water (E), wherein the thickening dispersant (D) includes a polyalkylene oxide having a phenyl group in a side chain thereof.

公开(公告)号：US11101463B2

公开(公告)日：2021-08-24

申请号：US16081080

申请日：2017-02-16

Applicant: SHOWA DENKO K.K.

Inventor： Mitsuru Hanasaki ,  Yasuhiro Nakagawa

IPC: H01M4/13 ,  H01M4/62 ,  C08F220/06 ,  C08F226/02 ,  H01M4/04 ,  H01M4/139 ,  H01M4/133 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M4/02

Abstract: A copolymer for binders, which is capable of reducing the internal resistance of a battery, while ensuring sufficient binding properties between active materials and between an active material and a collector in a nonaqueous battery electrode; a composition for binders; a slurry for nonaqueous battery electrodes; a nonaqueous battery electrode; and a nonaqueous battery. This copolymer for binders is a copolymer for binders (P) of a monomer mixture (M) that contains at least a monomer (A) represented by general formula (1) and a (meth)acrylate salt monomer (B); and an amount of structure derived from the monomer (A) based on the copolymer for binders (P) is set to 0.5 to 20.0% by mass. (In the formula, each of R1 and R2 independently represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.)

公开(公告)号：US10957909B2

公开(公告)日：2021-03-23

申请号：US15569502

申请日：2016-06-01

Applicant: SHOWA DENKO K.K.

Inventor： Junya Uchiyashiki ,  Mitsuru Hanasaki ,  Tomonori Kurata

IPC: H01M4/62 ,  C08F20/26 ,  H01M10/0525 ,  C07F9/09 ,  C07F9/11

Abstract: A binder composition for nonaqueous battery electrodes essentially contains (A) an ethylenically unsaturated monomer and (B) a surfactant, and further satisfies any two or more conditions of the following (I) to (III): (I) (A) the ethylenically unsaturated monomer includes (a) a phosphoric acid group-containing ethylenically unsaturated monomer; (II) (B) the surfactant comprises (b) a phosphoric acid group-containing surfactant; and (III) the composition including (C) a neutralizing agent containing an alkali metal compound and/or an alkali earth metal compound.

公开(公告)号：US09947929B2

公开(公告)日：2018-04-17

申请号：US15024444

申请日：2014-06-20

Applicant: SHOWA DENKO K.K.

Inventor： Tomonori Kurata ,  Mitsuru Hanasaki ,  Junya Uchiyashiki

IPC: H01M4/62 ,  C08L1/02 ,  C08L71/02 ,  H01M4/137 ,  H01M4/1399 ,  H01M4/13

CPC classification number: H01M4/622 ,  C08L1/02 ,  C08L71/02 ,  H01M4/13 ,  H01M4/137 ,  H01M4/1399

Abstract: A binder composition for nonaqueous battery electrodes is prepared by adding a small amount of an acetylene glycol compound to an aqueous polymer emulsion obtained by emulsion polymerization of a monomer mixture comprising from 15 to 70% by mass of styrene (a), from 20 to 80% by mass of an ethylenically unsaturated carboxylate (b), from 1 to 10% by mass of an ethylenically unsaturated carboxylic acid (c), from 0.1 to 5% by mass of a crosslinkable ethylenically unsaturated monomer (d), and from 0 to 20% by mass of another monoethylenically unsaturated monomer (e). When the above binder composition is used, an active material is not peeled off in the step of cutting a collector even when a small amount of the binder is used, and a nonaqueous battery excellent in a charge-discharge cycle property can be produced.