Patents by Inventor Koji ANNAKA

Koji ANNAKA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210351479
    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)<B (g/m2). In formula (1), A represents coating weight in an inner region P at surface Z and B represents coating weight in an outer region Q at surface Z. Inner region P is a region that has a center of surface Z as a center, has a similar shape to a shape of surface Z, and has an area equivalent to 80% of area of surface Z, and outer region Q is all regions other than inner region P at surface Z.
    Type: Application
    Filed: September 25, 2019
    Publication date: November 11, 2021
    Applicant: ZEON CORPORATION
    Inventors: Koji ANNAKA, Masanobu SATO
  • Publication number: 20210344048
    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.
    Type: Application
    Filed: September 12, 2019
    Publication date: November 4, 2021
    Applicant: ZEON CORPORATION
    Inventors: Masanobu SATO, Hiroshi KOGA, Masuhiro ONISHI, Koji ANNAKA
  • Publication number: 20210296732
    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 ?0 at a shear rate of 100 s?1 of less than 10 mPa·s, a viscosity ?1 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 (?0/?1) of the viscosity ?0 relative to the viscosity ?1 of not less than 1.2 and not more than 10.
    Type: Application
    Filed: August 22, 2019
    Publication date: September 23, 2021
    Applicant: ZEON CORPORATION
    Inventors: Hiroshi KOGA, Masanobu SATO, Koji ANNAKA
  • Patent number: 11046797
    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.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: June 29, 2021
    Assignee: ZEON CORPORATION
    Inventors: Kunihiro Goto, Maki Mesuda, Koji Annaka, Takuya Ishii
  • Patent number: 10985375
    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 %.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: April 20, 2021
    Assignee: ZEON CORPORATION
    Inventors: Koji Annaka, Takuya Ishii
  • Publication number: 20200280072
    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 %.
    Type: Application
    Filed: September 5, 2018
    Publication date: September 3, 2020
    Applicant: ZEON CORPORATION
    Inventors: Koji ANNAKA, Kazuki ASAI
  • Publication number: 20200266421
    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 %.
    Type: Application
    Filed: September 18, 2018
    Publication date: August 20, 2020
    Applicant: ZEON CORPORATION
    Inventors: Kazuki ASAI, Koji ANNAKA
  • Publication number: 20200220138
    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.
    Type: Application
    Filed: September 19, 2018
    Publication date: July 9, 2020
    Applicant: ZEON CORPORATION
    Inventors: Koji ANNAKA, Kazuki ASAI
  • Publication number: 20200127263
    Abstract: Provided is a binder composition for a non-aqueous secondary battery porous membrane capable of forming a porous membrane having improved adhesiveness in electrolyte solution, heat shrinkage resistance in electrolyte solution, and blocking resistance. The binder composition for a non-aqueous secondary battery porous membrane contains a particulate polymer A and a particulate polymer B having a larger volume-average particle diameter than the particulate polymer A. The particulate polymer A includes a (meth)acrylic acid alkyl ester monomer unit in a proportion of not less than 50 mass % and not more than 90 mass %. The particulate polymer B has a core-shell structure and includes a nitrile group-containing monomer unit in a core portion of the core-shell structure.
    Type: Application
    Filed: April 19, 2018
    Publication date: April 23, 2020
    Applicant: ZEON CORPORATION
    Inventor: Koji ANNAKA
  • Publication number: 20190348681
    Abstract: A slurry composition for a non-aqueous secondary battery negative electrode contains a negative electrode active material including lithium titanium oxide, a binder, and an organic solvent. The binder includes a copolymer that includes a nitrile group-containing monomer unit and at least one selected from an aliphatic conjugated diene monomer unit and an alkylene structural unit and that has a Mooney viscosity (ML1+4, 100° C.) of not less than 50 and not more than 200.
    Type: Application
    Filed: December 14, 2017
    Publication date: November 14, 2019
    Applicant: ZEON CORPORATION
    Inventors: Koji ANNAKA, Naoki TAKAHASHI, Tomoya MURASE
  • Publication number: 20190198878
    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 %.
    Type: Application
    Filed: September 8, 2017
    Publication date: June 27, 2019
    Applicant: ZEON CORPORATION
    Inventors: Koji ANNAKA, Takuya ISHII
  • Publication number: 20190085109
    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.
    Type: Application
    Filed: March 24, 2017
    Publication date: March 21, 2019
    Applicant: ZEON CORPORATION
    Inventors: Kunihiro GOTO, Maki MESUDA, Koji ANNAKA, Takuya ISHII