公开(公告)号：US20230317951A1

公开(公告)日：2023-10-05

申请号：US18017529

申请日：2021-08-11

Applicant: DENKA COMPANY LIMITED

Inventor： Ryosuke KANTO ,  Yuhei ISHIGAKI ,  Jun WATANABE

IPC: H01M4/62 ,  H01M4/04 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/505 ,  H01M4/485

CPC classification number: H01M4/622 ,  H01M4/625 ,  H01M4/0404 ,  H01M4/661 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M2004/028

Abstract: A composition, serving as a binder with a good balance between suppression of battery performance degradation at a high-capacity electrode, high-temperature storage property, and DC resistance, a slurry for a positive electrode using the composition, a positive electrode, and a secondary battery. The composition includes a graft copolymer, wherein: the graft copolymer has a stem polymer and a branch polymer; the stem polymer contains a polyvinyl alcohol structure, the branch polymer contains a first monomer unit containing a (meth)acrylonitrile monomer unit and/or a (meth)acrylic acid monomer; the composition has a swelling rate to an electrolytic solution of 105 to 200% at 25° C. for 15 days; the swelling rate is a swelling rate after immersing the composition in the electrolytic solution at 25° C. for 15 days; and the electrolytic solution is obtained by mixing ethylene carbonate and diethyl carbonate at a volume ratio of 1:2.

公开(公告)号：US20180358624A1

公开(公告)日：2018-12-13

申请号：US15774541

申请日：2016-08-26

Applicant: Denka Company Limited

Inventor： Takuya NARUTOMI ,  Jun WATANABE ,  Shigeru SUZUKI

IPC: H01M4/62 ,  C08F261/04 ,  C08K3/04 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  H01M4/66 ,  H01M10/0525

CPC classification number: H01M4/622 ,  C08F261/04 ,  C08K3/04 ,  C08K2201/001 ,  C08L51/06 ,  H01M4/0404 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/625 ,  H01M4/661 ,  H01M10/0525 ,  H01M2004/028 ,  Y02E60/122 ,  Y02T10/7011 ,  C08F220/44 ,  C08L33/20

Abstract: A binder composition for positive electrode with superior oxidation resistance is provided. A slurry for positive electrode, a positive electrode, and a lithium ion secondary battery manufactured by using the binder composition is provided. A binder composition for positive electrode including a graft copolymer in which a monomer containing acrylonitrile as a main component is graft copolymerized with polyvinyl alcohol having an average degree of polymerization of 300 to 3000 and a saponification degree of 70 to 100 mol %, is provided. Further, a slurry for positive electrode includes the binder composition for positive electrode, a positive electrode active material, and a conductive assistant. In addition, a lithium ion secondary battery is manufactured using a positive electrode made with the slurry for positive electrode and a positive electrode.

公开(公告)号：US20230193090A1

公开(公告)日：2023-06-22

申请号：US17923377

申请日：2021-05-17

Applicant: DENKA COMPANY LIMITED

Inventor： Tometomo UCHIDA ,  Toru ARAI ,  Takashi DOMOTO ,  Takako TANIGAWA ,  Jun WATANABE ,  Megumi SUDO ,  Jun YOSHIDA

IPC: C09J123/22 ,  C08K5/00 ,  C08F2/44 ,  C08F2/48 ,  H01L21/02 ,  C08K5/101 ,  C08F20/20 ,  C09J11/06

CPC classification number: C09J123/22 ,  C08K5/0025 ,  C08F2/44 ,  C08F2/48 ,  H01L21/02304 ,  H01L21/0231 ,  C08K5/101 ,  C08F20/20 ,  C09J11/06

Abstract: A composition for temporary bonding, includes: (A) a (meth)acrylate having the following (A-1) and (A-2): (A-1) a monofunctional (meth)acrylate whose side chain is an alkyl group having 18 or more carbon atoms and homopolymer has a Tg of −100° C. to 60° C., and (A-2) a polyfunctional (meth)acrylate; (B) a polyisobutene homopolymer and/or a polyisobutene copolymer; and (C) a photo radical polymerization initiator.

公开(公告)号：US20230348646A1

公开(公告)日：2023-11-02

申请号：US18018060

申请日：2021-08-11

Applicant: DENKA COMPANY LIMITED

Inventor： Yuhei ISHIGAKI ,  Ryosuke KANTO ,  Jun WATANABE

IPC: C08F261/04 ,  C08L51/06 ,  H01M4/62 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/505

CPC classification number: C08F261/04 ,  C08L51/06 ,  H01M4/622 ,  H01M4/625 ,  H01M4/0404 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/505 ,  H01M2004/028

Abstract: A composition that serves as a binder for a positive electrode with a good balance between suppression of battery performance degradation at a high-capacity electrode, high-temperature storage property, and DC resistance, a slurry for a positive electrode using the composition, a positive electrode, and a secondary battery. A free induction decay curve of the composition obtained by measuring at 180° C. by Solid Echo method using pulse NMR is separated into three components, component S180, component M180, and component H180, a component ratio of the component S180 is 10% or more and 80% or less, and a relaxation time of the component S180 is 500 μs or more.

公开(公告)号：US20230200242A1

公开(公告)日：2023-06-22

申请号：US17998917

申请日：2021-05-20

Applicant: Denka Company Limited

Inventor： Yasuaki SAKURAI ,  Masahide YAMADA ,  Jun WATANABE

IPC: H10N10/855 ,  H10N10/01

CPC classification number: H10N10/855 ,  H10N10/01 ,  H10K85/00

Abstract: An n-type material for thermoelectric conversion obtained by doping a p-type material for thermoelectric conversion with a dopant, the p-type material for thermoelectric conversion containing a carbon nanotube and a conductive resin, in which the dopant contains an anion that is a complex ion, an alkali metal cation, and a cation scavenger.

公开(公告)号：US20210151763A1

公开(公告)日：2021-05-20

申请号：US16621567

申请日：2018-06-13

Applicant: DENKA COMPANY LIMITED

Inventor： Takuya NARUTOMI ,  Jun WATANABE ,  Shigeru SUZUKI

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  C08L51/00 ,  C08L27/16

Abstract: An object of the present invention is to provide a composition for a positive electrode having high binding properties and high flexibility. A composition for a positive electrode, comprising: a graft copolymer-based resin; a polyvinylidene fluoride-based resin, wherein the graft copolymer-based resin includes a graft copolymer in which a monomer, having (meth)acrylonitrile as a main component, is graft-copolymerized with a polyvinyl alcohol. The graft copolymer-based resin optionally further includes at least one of a (meth)acrylonitrile-based non-graft polymer and a polyvinyl alcohol homopolymer. And, a slurry for a positive electrode comprising the composition. A positive electrode comprising a metal foil and a coating film of the slurry. The composition preferably has a mass ratio of the graft copolymer-based resin and the polyvinylidene fluoride resin, which is: graft copolymer-based resin/polyvinylidene fluoride-based resin=2/8 to 8/2.

公开(公告)号：US20160240854A1

公开(公告)日：2016-08-18

申请号：US15028115

申请日：2014-10-06

Applicant: DENKA COMPANY LIMITED

Inventor： Yasuaki SAKURAI ,  Jun YOSHIDA ,  Jun WATANABE

IPC: H01M4/62 ,  H01M4/131 ,  H01M10/0525 ,  C08F261/04

CPC classification number: H01M4/622 ,  C08F261/04 ,  H01M4/131 ,  H01M4/136 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028 ,  Y02T10/7011 ,  C08F220/44

Abstract: To provide a cathode binder composition having excellent binding properties and oxidation resistance. To further provide a cathode slurry, a cathode, and a lithium ion secondary battery produced using the cathode binder composition.The cathode binder composition contains a graft copolymer in which a monomer containing acrylonitrile as the main component is grafted onto polyvinyl alcohol having an average degree of polymerization of 300 to 3000 and a degree of saponification of 70 to 100% by mol. The cathode slurry contains the cathode binder composition, a cathode active material, and a conductive auxiliary. The cathode is produced using the cathode slurry. The lithium ion secondary battery has the cathode.

Abstract translation: 提供具有优异的结合性和抗氧化性的阴极粘合剂组合物。 进一步提供使用阴极粘合剂组合物制造的阴极浆料，阴极和锂离子二次电池。 阴极粘合剂组合物含有以丙烯腈为主要成分的单体接枝到平均聚合度为300〜3000，皂化度为70〜100摩尔％的聚乙烯醇上的接枝共聚物。 阴极浆料包含阴极粘合剂组合物，阴极活性材料和导电助剂。 使用阴极浆料制造阴极。 锂离子二次电池具有阴极。

公开(公告)号：US20230275233A1

公开(公告)日：2023-08-31

申请号：US18017474

申请日：2021-08-11

Applicant: DENKA COMPANY LIMITED

Inventor： Ryosuke KANTO ,  Yuhei ISHIGAKI ,  Jun WATANABE

IPC: H01M4/62 ,  H01M10/0569 ,  H01M4/04 ,  H01M4/66 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M4/622 ,  H01M10/0569 ,  H01M4/625 ,  H01M4/0404 ,  H01M4/661 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M2300/0051 ,  H01M2300/0037 ,  H01M2004/028

Abstract: A composition including a graft copolymer, wherein the graft copolymer has a stem polymer and a branch polymer; the stem polymer contains a polyvinyl alcohol structure, the branch polymer contains a first monomer unit containing a (meth)acrylonitrile monomer unit and/or a (meth)acrylic acid monomer; the composition has a gel fraction of 30% or more; the gel fraction is represented by following formula: the gel fraction %=A×100/1; A g is an insoluble content left on a filter pater when 1 g of the composition is added to 300 ml of dimethyl sulfoxide to obtain a mixture and the mixture is stirred at 60° C. for 15 hours and then filtered through the filter paper, which is a No. 5C filter paper as specified in JIS P 380.

公开(公告)号：US20200207898A1

公开(公告)日：2020-07-02

申请号：US16622513

申请日：2018-06-13

Applicant: DENKA COMPANY LIMITED

Inventor： Soichiro NAKANISHI ,  Takuya NARUTOMI ,  Kyoichi INOUE ,  Shigeru SUZUKI ,  Jun WATANABE

IPC: C08F261/04 ,  C08K3/04 ,  C08L51/00 ,  H01M10/0525 ,  H01M4/62 ,  H01M4/525 ,  H01M4/131 ,  H01M4/505

Abstract: An object of the present invention is to provide a composition having flexibility. A composition comprising a graft copolymer in which a monomer, including a (meth) acrylonitrile and a (meth) acrylic acid ester as a main monomer, graft-copolymerizes to a backbone polymer having a polyvinyl alcohol, wherein the polyvinyl alcohol has a saponification degree of 50 to 100 mol %, a content of the composition of the polyvinyl alcohol is 5 to 50% by mass, a total content of the (meth) acrylonitrile monomer unit and the (meth) acrylic acid ester monomer unit is 50 to 95% by mass, a content of the (meth) acrylonitrile monomer unit in a total of 100% by mass of the (meth) acrylonitrile monomer unit and the (meth)acrylate monomer unit is 20 to 95% by mass, a content of the (meth)acrylate monomer unit in a total of 100% by mass of the (meth) acrylonitrile monomer unit and the (meth)acrylate monomer unit is 5 to 80% by mass, the (meth) acrylic acid ester is a monomer whose homopolymer has a glass transition temperature of 150 to 300 K.

公开(公告)号：US20190027756A1

公开(公告)日：2019-01-24

申请号：US16080938

申请日：2017-03-08

Applicant: DENKA COMPANY LIMITED

Inventor： Takuya NARUTOMI ,  Jun WATANABE ,  Shigeru SUZUKI

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/133 ,  C08L51/00

Abstract: Provided is a binder composition for negative electrode that has good binding property with an active material and a metal foil and is superior in reduction resistance. A binder composition for negative electrode comprising a graft copolymer obtained by graft copolymerizing, with polyvinyl alcohol, a monomer containing (meth)acrylonitrile as a main component, wherein the polyvinyl alcohol has an average degree of polymerization of 300 to 3000; the polyvinyl alcohol has a saponification degree of 70 to 100 mol %; the graft copolymer has a polyvinyl alcohol amount of 10 to 90 mass %; and the graft copolymer has a poly(meth)acrylonitrile amount of 90 to 10 mass %.