Patents by Inventor Yasuhiro Wakizaka

Yasuhiro Wakizaka 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).

  • Patent number: 11613098
    Abstract: Provided is a laminate for a non-aqueous secondary battery that, in transfer of a functional layer onto a substrate for a non-aqueous secondary battery, enables easy peeling of the functional layer from a releasable substrate while also enabling good adhesion of the functional layer to the substrate for a non-aqueous secondary battery. The laminate for a non-aqueous secondary battery includes a releasable substrate and a functional layer containing a binder. The functional layer is formed in a dotted form on a surface A at one side of the releasable substrate.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: March 28, 2023
    Assignee: ZEON CORPORATION
    Inventors: Yasuhiro Wakizaka, Masanobu Sato, Hiroshi Koga, Kouichirou Maeda
  • Publication number: 20220263112
    Abstract: Provided is a slurry composition for an all-solid-state secondary battery that has excellent fluidity and preservation stability and can form a solid electrolyte-containing layer having excellent ion conductivity. The slurry composition contains a solid electrolyte, a polymer, and a solvent. The ratio of fineness of grind of the solid electrolyte, as measured by a grind gauge method based on JIS K5600-2-5:1999, relative to the average primary particle diameter of the solid electrolyte is more than 1 and less than 30.
    Type: Application
    Filed: May 15, 2020
    Publication date: August 18, 2022
    Applicant: ZEON CORPORATION
    Inventors: Yusaku MATSUO, Yasuhiro WAKIZAKA
  • Patent number: 11417910
    Abstract: Provided is a method of efficiently producing a laminate for a non-aqueous secondary battery having excellent process adhesiveness. The method of producing a laminate for a non-aqueous secondary battery is a method of producing a laminate for a non-aqueous secondary battery including an electrode and a separator that are affixed to each other and includes: a step (A) of supplying, to at least one of an affixing surface of the electrode and an affixing surface of the separator, a substance that can plasticize a polymer contained in a surface layer part at an affixing surface side of at least one of the electrode and the separator; and a step (B) of affixing the electrode and the separator to each other after step (A).
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: August 16, 2022
    Assignee: ZEON CORPORATION
    Inventors: Hiroyuki Taguchi, Keiichiro Tanaka, Yasuhiro Wakizaka
  • Publication number: 20210050616
    Abstract: Provided is a method of efficiently producing a laminate for a non-aqueous secondary battery having excellent process adhesiveness. The method of producing a laminate for a non-aqueous secondary battery is a method of producing a laminate for a non-aqueous secondary battery including an electrode and a separator that are affixed to each other and includes: a step (A) of supplying, to at least one of an affixing surface of the electrode and an affixing surface of the separator, a substance that can plasticize a polymer contained in a surface layer part at an affixing surface side of at least one of the electrode and the separator; and a step (B) of affixing the electrode and the separator to each other after step (A).
    Type: Application
    Filed: March 20, 2019
    Publication date: February 18, 2021
    Applicant: ZEON CORPORATION
    Inventors: Hiroyuki TAGUCHI, Keiichiro TANAKA, Yasuhiro WAKIZAKA
  • Publication number: 20200331234
    Abstract: Provided is a laminate for a non-aqueous secondary battery that, in transfer of a functional layer onto a substrate for a non-aqueous secondary battery, enables easy peeling of the functional layer from a releasable substrate while also enabling good adhesion of the functional layer to the substrate for a non-aqueous secondary battery. The laminate for a non-aqueous secondary battery includes a releasable substrate and a functional layer containing a binder. The functional layer is formed in a dotted form on a surface A at one side of the releasable substrate.
    Type: Application
    Filed: August 14, 2018
    Publication date: October 22, 2020
    Applicant: ZEON CORPORATION
    Inventors: Yasuhiro WAKIZAKA, Masanobu SATO, Hiroshi KOGA, Kouichirou MAEDA
  • Patent number: 10468713
    Abstract: Provided is a binder composition for a non-aqueous secondary battery positive electrode that can form a positive electrode with which it is possible to obtain a non-aqueous secondary battery having excellent life characteristics even when aging treatment is carried out under low-temperature and low-depth of charge conditions. The binder composition contains a first binder, iron, and at least one of ruthenium and rhodium. The total iron, ruthenium, and rhodium content is no greater than 5×10?3 parts by mass per 100 parts by mass of the first binder.
    Type: Grant
    Filed: December 25, 2015
    Date of Patent: November 5, 2019
    Assignee: ZEON CORPORATION
    Inventors: Maki Katagiri, Yasuhiro Wakizaka, Mayumi Fukumine
  • Publication number: 20190273261
    Abstract: A binder composition from which an electrode for a non-aqueous secondary battery having excellent close adherence and a non-aqueous secondary battery that suppresses metal precipitation onto the electrode during charging and has excellent discharge capacity storage characteristics can be produced is provided. A binder composition for a non-aqueous secondary battery electrode comprises: a particulate polymer; and a surfactant, wherein a volume-average particle diameter of the particulate polymer is 0.01 ?m or more and 0.1 ?m or less, and a content of the surfactant is 0.1 parts by mass or more and 1.0 parts by mass or less relative to 100 parts by mass of the particulate polymer.
    Type: Application
    Filed: December 15, 2016
    Publication date: September 5, 2019
    Applicant: ZEON CORPORATION
    Inventors: Kenya SONOBE, Yasuhiro WAKIZAKA
  • Patent number: 10283748
    Abstract: A porous membrane composition for a lithium ion secondary battery, including a first particulate polymer, wherein the first particulate polymer has a core-shell structure including a core portion and a shell portion that partially covers an outer surface of the core portion, the core portion is formed from a polymer having a swelling degree in an electrolytic solution of 5 times or more and 30 times or less, and the shell portion is formed from a polymer having a swelling degree in the electrolytic solution of 1 time or more and 4 times or less.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: May 7, 2019
    Assignee: ZEON CORPORATION
    Inventors: Tomokazu Sasaki, Junnosuke Akiike, Yasuhiro Wakizaka
  • Patent number: 10141557
    Abstract: An adhesive for a lithium ion secondary battery, for bonding members for constituting a lithium ion secondary battery, the adhesive including a particulate polymer, wherein the particulate polymer has a core-shell structure including a core portion and a shell portion that partially covers an outer surface of the core portion, the core portion is formed from a polymer having a swelling degree in an electrolytic solution of 5 times or more and 30 times or less, and the shell portion is formed from a polymer having a swelling degree in an electrolytic solution of more than 1 time and 4 times or less.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: November 27, 2018
    Assignee: ZEON CORPORATION
    Inventors: Tomokazu Sasaki, Junnosuke Akiike, Yasuhiro Wakizaka
  • Publication number: 20170352915
    Abstract: Provided is a binder composition for a non-aqueous secondary battery positive electrode that can form a positive electrode with which it is possible to obtain a non-aqueous secondary battery having excellent life characteristics even when aging treatment is carried out under low-temperature and low-depth of charge conditions. The binder composition contains a first binder, iron, and at least one of ruthenium and rhodium. The total iron, ruthenium, and rhodium content is no greater than 5×10?3 parts by mass per 100 parts by mass of the first binder.
    Type: Application
    Filed: December 25, 2015
    Publication date: December 7, 2017
    Applicant: ZEON CORPORATION
    Inventors: Maki KATAGIRI, Yasuhiro WAKIZAKA, Mayumi FUKUMINE
  • Patent number: 9660238
    Abstract: A secondary battery porous membrane, manufactured by a slurry for secondary battery porous membrane, which is superior in coating priority and dispersibility of non-conductive organic particles, which improves cycle characteristic of the obtained secondary battery, which has high flexibility and can prevent powder falls, and which has less content of moisture amount; and non-conductive organic particles, which can be suitably used as a secondary battery porous membrane and has less content of metallic foreign particles. The slurry for secondary battery porous membrane comprises; a binder including a polymerized unit of vinyl monomer having a hydrophilic acid group, a non-conductive organic particle having a functional group, cross-linkable with the hydrophilic acid group and a solvent.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: May 23, 2017
    Assignee: Zeon Corporation
    Inventors: Taku Matsumura, Takuya Kaneda, Yasuhiro Wakizaka
  • Publication number: 20160141581
    Abstract: An adhesive for a lithium ion secondary battery, for bonding members for constituting a lithium ion secondary battery, the adhesive including a particulate polymer, wherein the particulate polymer has a core-shell structure including a core portion and a shell portion that partially covers an outer surface of the core portion, the core portion is formed from a polymer having a swelling degree in an electrolytic solution of 5 times or more and 30 times or less, and the shell portion is formed from a polymer having a swelling degree in an electrolytic solution of more than 1 time and 4 times or less.
    Type: Application
    Filed: June 27, 2014
    Publication date: May 19, 2016
    Applicant: ZEON CORPORATION
    Inventors: Tomokazu SASAKI, Junnosuke AKIIKE, Yasuhiro WAKIZAKA
  • Publication number: 20160141575
    Abstract: A porous membrane composition for a lithium ion secondary battery, including a first particulate polymer, wherein the first particulate polymer has a core-shell structure including a core portion and a shell portion that partially covers an outer surface of the core portion, the core portion is formed from a polymer having a swelling degree in an electrolytic solution of 5 times or more and 30 times or less, and the shell portion is formed from a polymer having a swelling degree in the electrolytic solution of 1 time or more and 4 times or less.
    Type: Application
    Filed: June 27, 2014
    Publication date: May 19, 2016
    Applicant: ZEON CORPORATION
    Inventors: Tomokazu SASAKI, Junnosuke AKIIKE, Yasuhiro WAKIZAKA
  • Patent number: 9306208
    Abstract: Disclosed is a manufacturing method of an electrode for an electrochemical element having a superior adhesion and is used for an electrochemical element with excellent productivity due to a short predoping time. Specifically disclosed is that the method is characterized by comprising a step for compression forming of electrode material (a mixed powder or composite particles) including an alkaline metal powder or an alkaline earth metal powder each having a coated surface.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: April 5, 2016
    Assignee: ZEON CORPORATION
    Inventors: Yasuhiro Isshiki, Yasuhiro Wakizaka
  • Patent number: 9263733
    Abstract: A negative electrode for a lithium ion secondary battery including an active material layer that is disposed on a current collector and that contains a negative electrode active material and a binder, in which the negative electrode active material includes an alloy active material and a carbon active material, and the weight ratio between the alloy active material and the carbon active material in the active material layer is 20:80 to 50:50, and the binder contains 0.1 to 15 wt % of an ethylenically unsaturated carboxylic acid monomer polymerization unit.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: February 16, 2016
    Assignee: Zeon Corporation
    Inventors: Yasuhiro Wakizaka, Kei Kobayashi
  • Patent number: 9202631
    Abstract: Provided is a porous film that can contribute to improving the cycle characteristics of an electric cell by improving binding characteristics, for a porous film provided on a surface of an electrode used in a secondary cell and the like. The porous film comprises a water-soluble polymer, an inorganic filler, and a water-insoluble particulate polymer including 0.5-40 mass % of a monomer unit having a hydrophilic group selected from the group consisting of carboxylic acid groups, hydroxyl groups, and sulfonate groups.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: December 1, 2015
    Assignee: ZEON CORPORATION
    Inventors: Yasuhiro Wakizaka, Mayumi Fukumine
  • Patent number: 9159992
    Abstract: Disclosed is a negative electrode active material for a lithium ion secondary battery, which is capable of further improving the charge/discharge cycle characteristics. Also disclosed is a lithium ion secondary battery which uses the negative electrode active material for a lithium ion secondary battery. The negative electrode active material for a lithium ion secondary battery is composed of composite particles each of which has a core/shell structure configured of a core part that is formed from a polymer and a shell part that is formed of a metal layer. The metal layer of the shell part is formed by metal plating. Preferably, the metal layer comprises at least a metal layer (a1) that is formed by electroless plating and a metal layer (a2) that is formed by electrolytic plating, in this order from the core part side.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: October 13, 2015
    Assignee: Zeon Corporation
    Inventors: Yasuhiro Wakizaka, Takumi Sugimoto
  • Patent number: 9153820
    Abstract: A binder composition for a non-aqueous battery electrode containing a binder and an ether compound represented by the formula (1), and an electrolyte solution composition for a non-aqueous battery containing an ether compound represented by the formula (1), wherein m and n each independently represent 0 or 1, and R1 represents a divalent linear hydrocarbon group which may have in the bond thereof one or more intervening groups selected from the group consisting of an oxygen atom, a sulfur atom, and a carbonyl group.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: October 6, 2015
    Assignee: ZEON CORPORATION
    Inventors: Kei Sakamoto, Natsuko Nakata, Yasuhiro Wakizaka
  • Patent number: 8940442
    Abstract: The present invention is intended for providing a porous film having excellent film uniformity, and is capable to contribute for improving cyclic and rate properties, which is provided on a surface of electrode used for a secondary battery and the like. The porous film of the present invention is characterized by including water soluble polymer having an average polymerization degree of 500 to 2500, an inorganic filler and water soluble particulate polymer. In the present invention particularly, it is preferable that said water soluble polymer is thickening polysaccharides, further said water-insoluble polymer is preferably selected from the group consisting of semisynthetic cellulose polymer, sodium salt and ammonium salt thereof.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: January 27, 2015
    Assignee: Zeon Corporation
    Inventors: Mayumi Fukumine, Yasuhiro Wakizaka
  • Patent number: 8895184
    Abstract: In regards with the porous film provided on the surface of the electrode used for the secondary battery or so, the present invention provides the porous film which can contribute to reduce the adhered material to the roll during the roll winding of the electrode. The secondary battery electrode formed by adhering; the porous film comprising the inorganic filler and the binder, and styrene and the polymer having the glass transition temperature of 15° C. or less as said binder, the porous film slurry comprising the inorganic filler, the polymer having the glass transition temperature of 15° C. or less and the solvent, and the electrode composite layer comprising the binder and the electrode active material, to the current collector, and said porous film is provided on the surface of the electrode composite layer.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: November 25, 2014
    Assignee: Zeon Corporation
    Inventors: Yasuhiro Wakizaka, Mayumi Fukumine