公开(公告)号：US20180301704A1

公开(公告)日：2018-10-18

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 ,  C07F9/11 ,  C07F9/09

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：US20230335737A1

公开(公告)日：2023-10-19

申请号：US17777530

申请日：2020-10-22

Applicant: SHOWA DENKO K.K.

Inventor： Yuta KAWAHARA ,  Tomonori KURATA ,  Mitsuru HANASAKI

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/04

CPC classification number: H01M4/622 ,  H01M10/0525 ,  H01M4/386 ,  H01M4/0404 ,  H01M2004/027

Abstract: The invention is related to a nonaqueous secondary battery electrode having an electrode active material layer with little crack and high peel strength to a current collector, and can reduce the internal resistance of the battery; and an electrode slurry therefor, and a nonaqueous secondary battery. The electrode active material layer of the nonaqueous secondary battery contains an electrode active material (A), a copolymer (P), a nonionic surfactant (B), and a cellulose derivative (C). A content of the nonionic surfactant (B) to 100 parts by mass of the copolymer (P) is 5.0 to 350 parts by mass, and a content of the cellulose derivative (C) is 10 to 350 parts by mass. The copolymer (P) contains a structural unit (p1) derived from a (meth)acrylic acid salt of 50 to 99% by mass and a structural unit (p2) derived from a compound represented by general formula (1) of 0.50 to 30% by mass.

公开(公告)号：US20190020035A1

公开(公告)日：2019-01-17

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 ,  C08F212/34 ,  C08F236/06 ,  H01M4/04 ,  H01M4/139 ,  H01M10/0525

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：US20160248095A1

公开(公告)日：2016-08-25

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 ,  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.

Abstract translation: 通过将含有15〜70质量％的苯乙烯（a）的单体混合物的乳液聚合得到的水性聚合物乳液中添加少量的乙炔二醇化合物20〜80，制备非水电极电极用粘合剂组合物 质量％的烯属不饱和羧酸酯（b），1〜10质量％的烯属不饱和羧酸（c），0.1〜5质量％的交联性烯属不饱和单体（d），0〜 20质量％的另一单烯属不饱和单体（e）。 当使用上述粘合剂组合物时，即使使用少量的粘合剂，在切割集电体的步骤中也不会剥离活性材料，并且可以产生充放电循环特性优异的非水电池。

公开(公告)号：US20230223540A1

公开(公告)日：2023-07-13

申请号：US18007578

申请日：2021-05-31

Applicant: SHOWA DENKO K.K.

Inventor： Yuma TANAKA ,  Kentarou TAKAHASHI ,  Kazunari FUKASE ,  Tomonori KURATA ,  Mitsuru HANASAKI

IPC: H01M4/62 ,  H01M10/0525 ,  C08F220/06

CPC classification number: H01M4/622 ,  H01M10/0525 ,  C08F220/06 ,  C08F2800/20

Abstract: The present invention provides a binder for a nonaqueous secondary battery electrode capable of greatly improving the peeling strength of an electrode active material layer to a current collector while suppressing the occurrence of cracks in the electrode active material layer formed on the current collector. The binder for a nonaqueous secondary battery electrode includes a copolymer (P) having a structural unit (a) derived from a monomer (A) represented by formula (1), a structural unit (b) derived from a monomer (B) which is at least one kind selected from the group consisting of a (meth)acrylic acid and a salt thereof, and a structural unit (c) derived from a monomer (C) which is an ethylenically unsaturated carboxylic acid ester of an aromatic alcohol.

公开(公告)号：US20190058195A1

公开(公告)日：2019-02-21

申请号：US16081080

申请日：2017-02-16

Applicant: SHOWA DENKO K.K.

Inventor： Mitsuru HANASAKI ,  Yasuhiro NAKAGAWA

IPC: H01M4/62 ,  C08F220/06 ,  H01M4/587 ,  H01M4/133 ,  H01M10/0525

Abstract: The invention relates to 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：US20210296651A1

公开(公告)日：2021-09-23

申请号：US17260440

申请日：2019-07-12

Applicant: SHOWA DENKO K.K.

Inventor： Tomonori KURATA ,  Shuhei MARUTA ,  Kirida KUNANURUKSAPONG ,  Mitsuru HANASAKI

IPC: H01M4/62 ,  H01M4/13 ,  H01M10/0525 ,  C08F290/06

Abstract: The present invention relates to a copolymer for a binder for a non-aqueous battery electrode, which ensures sufficient binding properties between active materials and between the active materials and a current collector, suppresses generation of aggregates in a slurry containing the electrode active material, suppresses generation of cracks in an electrode active material layer, and sufficiently ensures peel strength of the electrode active material layer against the current collector. The copolymer for a binder for a non-aqueous battery electrode is a copolymer (P) of a monomer mixture (M) containing a monomer (A) represented by general formula (1), a (meth)acrylic acid monomer (B), and a monomer (C) represented by general formula (2), wherein a content of a structure derived from the monomer (A) in the copolymer (P) is 0.5 to 20.0 mass % and a content of a structure derived from the monomer (C) in the copolymer (P) is 0.5 to 20.0 mass %.

公开(公告)号：US20180233750A1

公开(公告)日：2018-08-16

申请号：US15750860

申请日：2016-08-03

Applicant: SHOWA DENKO K.K.

Inventor： Yusuke AOKI ,  Mitsuru HANASAKI

IPC: H01M4/62 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/04 ,  H01M10/0525 ,  C09D5/24 ,  C09D171/02 ,  C09D101/10

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：US20150357647A1

公开(公告)日：2015-12-10

申请号：US14760647

申请日：2014-01-20

Applicant: SHOWA DENKO K.K.

Inventor： Tomonori KURATA ,  Mitsuru HANASAKI ,  Kazunari FUKASE

IPC: H01M4/62 ,  H01M4/133 ,  H01M10/0525 ,  H01M4/131

CPC classification number: H01M4/622 ,  H01M4/131 ,  H01M4/133 ,  H01M4/139 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2220/30

Abstract: The present invention provides a binder for lithium ion secondary battery electrodes that is obtained by emulsion polymerization of an ethylenically unsaturated monomer in an aqueous medium in the presence of a surfactant, the ethylenically unsaturated monomer being composed, with respect to the total mass of the ethylenically unsaturated monomer, of 15% by mass to 70% by mass of styrene, 1% by mass to 10% by mass of an N atom-containing ethylenically unsaturated monomer, 1% by mass to 10% by mass of an ethylenically unsaturated carboxylic acid, 0.1% by mass to 5% by mass of an internal crosslinking agent, and 22% by mass to 82.9% by mass of another ethylenically unsaturated monomer that is copolymerizable with these substances, and has a glass transition temperature of −55° C. to 30° C.

Abstract translation: 本发明提供了一种用于锂离子二次电池电极的粘合剂，其通过烯属不饱和单体在水性介质中在表面活性剂存在下乳液聚合而获得，所述表面活性剂组成的烯属不饱和单体相对于烯属不饱和单体的总质量 不饱和单体为15质量％〜70质量％的苯乙烯，1质量％〜10质量％的含N原子的烯键式不饱和单体，1质量％〜10质量％的烯属不饱和羧酸 ，0.1质量％〜5质量％的内部交联剂，22质量％〜82.9质量％的另外的可与这些物质共聚的烯属不饱和单体，玻璃化转变温度为-55℃。 至30℃