公开(公告)号：US20220123433A1

公开(公告)日：2022-04-21

申请号：US17310840

申请日：2020-02-19

Applicant: ZEON CORPORATION

Inventor： Hiroyuki TAGUCHI ,  Koji ANNAKA

IPC: H01M50/446 ,  H01G11/52 ,  H01G11/18

Abstract: Provided is a technique that enables efficient formation of a functional layer for an electrochemical device in which dusting is inhibited and that can ensure sufficient heat resistance while also displaying excellent adhesiveness. A composition for an electrochemical device functional layer contains a particulate polymer, a binder, and inorganic particles. The particulate polymer has an average circularity of not less than 0.90 and less than 0.99 and a volume-average particle diameter of not less than 1.0 μm and not more than 10.0 μm.

公开(公告)号：US20220231378A1

公开(公告)日：2022-07-21

申请号：US17595779

申请日：2020-05-29

Applicant: ZEON CORPORATION

Inventor： Koji ANNAKA ,  Masanobu SATO

IPC: H01M50/449 ,  H01M50/446 ,  H01M50/411 ,  H01M50/489 ,  H01M50/443

Abstract: A functional layer-equipped separator for an electrochemical device includes a separator substrate and a functional layer for an electrochemical device disposed on at least one surface of the separator substrate. The functional layer for an electrochemical device contains inorganic particles and a particulate polymer. A surface of the functional layer for an electrochemical device has a maximum height Sz of 2.5 μm or more. The functional layer for an electrochemical device includes one or more protrusions each containing the particulate polymer at a surface thereof.

公开(公告)号：US20210344048A1

公开(公告)日：2021-11-04

申请号：US17272652

申请日：2019-09-12

Applicant: ZEON CORPORATION

Inventor： Masanobu SATO ,  Hiroshi KOGA ,  Masuhiro ONISHI ,  Koji ANNAKA

IPC: H01M10/0585 ,  H01M10/0525 ,  H01M50/209

Abstract: Provided is a laminate for a secondary battery in which separator curling up is inhibited. A method of producing a laminate for a secondary battery includes: a step (A) of producing an affixed body including a negative electrode material and separator webs affixed to both surfaces of the negative electrode material or an affixed body including a negative electrode material, a first separator web, a positive electrode, and a second separator web affixed in stated order; and a step (B) of cutting the affixed body. The step (A) includes a step (a1) of applying an adhesive material at affixing surfaces of the negative electrode material and the separator webs. The adhesive material is applied in the step (a1) such that a first coated section including a region where the adhesive material is applied with a coating weight M1 and a second coated section including a region where the adhesive material is applied with a coating weight M2 (≥M1+0.02 g/m2) are located alternately in a longitudinal direction. The affixed body is cut within a range where the second coated section is located in the step (B). The positive electrode is located at a position opposite the first coated section.

公开(公告)号：US20200266421A1

公开(公告)日：2020-08-20

申请号：US16646571

申请日：2018-09-18

Applicant: ZEON CORPORATION

Inventor： Kazuki ASAI ,  Koji ANNAKA

IPC: H01M4/131 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0565 ,  C08F220/06

Abstract: Provided is a composition for a non-aqueous secondary battery functional layer that has excellent slurry stability and can form a functional layer for which sufficient heat shrinkage resistance is ensured. The composition for a non-aqueous secondary battery functional layer contains organic particles, a water-soluble polymer, and water. The organic particles include a polyfunctional monomer unit in a proportion of not less than 20 mass % and not more than 95 mass %, and the water-soluble polymer includes a hydroxyl group-containing structural unit in a proportion of not less than 15 mass % and not more than 100 mass %.

公开(公告)号：US20210351479A1

公开(公告)日：2021-11-11

申请号：US17273812

申请日：2019-09-25

Applicant: ZEON CORPORATION

Inventor： Koji ANNAKA ,  Masanobu SATO

IPC: H01M50/46 ,  H01M10/0525 ,  H01M10/0585

Abstract: A secondary battery includes a laminate in which a positive electrode, separator, and negative electrode are stacked in stated order. The coating weight of an adhesive material at a surface Z that is an affixing surface X of the positive electrode and separator and/or an affixing surface Y of the negative electrode and separator satisfies relationship formula (1): A (g/m2)+0.02 (g/m2)

公开(公告)号：US20210296732A1

公开(公告)日：2021-09-23

申请号：US17266107

申请日：2019-08-22

Applicant: ZEON CORPORATION

Inventor： Hiroshi KOGA ,  Masanobu SATO ,  Koji ANNAKA

IPC: H01M50/443 ,  H01M50/46 ,  H01M50/414 ,  H01M4/139 ,  H01M4/13 ,  H01M50/403 ,  H01M4/04 ,  C09J151/00

Abstract: Provided is a composition for a non-aqueous secondary battery adhesive layer containing organic particles, a thixotropic agent, and water. The organic particles have a core-shell structure including a core portion and a shell portion at least partially covering an outer surface of the core portion. The composition for a non-aqueous secondary battery adhesive layer has a viscosity η0 at a shear rate of 100 s−1 of less than 10 mPa·s, a viscosity η1 at a shear rate of 10,000 s−1 of not less than 0.5 mPa·s and not more than 2.4 mPa·s, and a ratio (η0/η1) of the viscosity η0 relative to the viscosity η1 of not less than 1.2 and not more than 10.

公开(公告)号：US20200280072A1

公开(公告)日：2020-09-03

申请号：US16650865

申请日：2018-09-05

Applicant: ZEON CORPORATION

Inventor： Koji ANNAKA ,  Kazuki ASAI

IPC: H01M4/60 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/04 ,  H01M4/62 ,  H01M10/0568 ,  H01M10/0569

Abstract: Provided is a composition for a non-aqueous secondary battery functional layer with which it is possible to form a functional layer that has excellent heat shrinkage resistance and adhesiveness after immersion in electrolyte solution and that can cause a non-aqueous secondary battery to display excellent cycle characteristics. The composition for a functional layer contains first organic particles, second organic particles, and a solvent. The first organic particles include a polyfunctional ethylenically unsaturated monomer unit in a proportion of not less than 20 mass % and not more than 90 mass %. The second organic particles include a nitrile group-containing monomer unit in a proportion of not less than 20 mass % and not more than 80 mass % and a cross-linkable monomer unit in a proportion of not less than 0.1 mass % and not more than 10 mass %.

公开(公告)号：US20200220138A1

公开(公告)日：2020-07-09

申请号：US16646142

申请日：2018-09-19

Applicant: ZEON CORPORATION

Inventor： Koji ANNAKA ,  Kazuki ASAI

IPC: H01M2/16 ,  H01M4/62 ,  H01M4/36

Abstract: Provided is a composition for a non-aqueous secondary battery functional layer with which it is possible to form a functional layer that has excellent heat shrinkage resistance and can cause a non-aqueous secondary battery to display excellent cycle characteristics. The composition for a non-aqueous secondary battery functional layer contains organic particles and a solvent. The organic particles include a polyfunctional ethylenically unsaturated monomer unit in a proportion of not less than 55 mass % and not more than 90 mass %, and have a volume-average particle diameter of not less than 50 nm and not more than 370 nm.

公开(公告)号：US20190198878A1

公开(公告)日：2019-06-27

申请号：US16331669

申请日：2017-09-08

Applicant: ZEON CORPORATION

Inventor： Koji ANNAKA ,  Takuya ISHII

IPC: H01M4/62 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  C08F220/48 ,  C08K3/22 ,  C08K3/04 ,  C08K7/06

CPC classification number: H01M4/622 ,  C08F220/48 ,  C08F2800/20 ,  C08K3/04 ,  C08K3/22 ,  C08K7/06 ,  C08K2003/2293 ,  C08K2201/001 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M4/625 ,  H01M10/0525 ,  H01M10/0566 ,  H01M2004/028

Abstract: Provided is a slurry composition for a non-aqueous secondary battery positive electrode that has excellent stability and enables formation of a positive electrode mixed material layer that causes a non-aqueous secondary battery to display excellent output characteristics. The slurry composition contains a positive electrode active material and a copolymer. The proportion constituted by nickel among transition metal in the positive electrode active material is at least 30.0 mol % and not more than 100.0 mol %. The copolymer includes a nitrile group-containing monomer unit in a proportion of at least 70.0 mass % and not more than 96.0 mass % and a basic group-containing monomer unit in a proportion of at least 0.1 mass % and not more than 5.0 mass %.

公开(公告)号：US20190085109A1

公开(公告)日：2019-03-21

申请号：US16082677

申请日：2017-03-24

Applicant: ZEON CORPORATION

Inventor： Kunihiro GOTO ,  Maki MESUDA ,  Koji ANNAKA ,  Takuya ISHII

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

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.