Patents by Inventor Kayoko YUKAWA

Kayoko YUKAWA 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).

  • NEGATIVE ELECTRODE BODY, LITHIUM ION BATTERY, AND METHOD OF PRODUCING ACTIVE MATERIAL FOR LITHIUM ION BATTERY
    Publication number: 20240014388
    Abstract: A negative electrode body of the present disclosure is a negative electrode body for a lithium ion battery having a negative electrode current collector layer and a negative electrode active material layer, wherein the negative electrode active material layer contains Si particles having a clathrate type structure as a negative electrode active material, wherein the negative electrode active material layer contains 0.850 mass % to 5.000 mass % of Al with respect to a mass of the negative electrode active material layer, and wherein the Si particles contain 0.040 mass % to 0.250 mass % of Al with respect to a mass of the Si particles.
    Type: Application
    Filed: July 7, 2023
    Publication date: January 11, 2024
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Mitsutoshi Otaki, Jun Yoshida, Shinji Nakanishi, Yasuhiro Yamaguchi, Tatsuya Eguchi, Masanori Harata, Kota Urabe, Tomohiro Niimi, Kayoko Yukawa
  • Negative-electrode active material, production process for the same and electric storage apparatus
    Patent number: 10141563
    Abstract: A negative-electrode active material is used, the negative-electrode active material including: a nanometer-size silicon material produced by heat treating a lamellar polysilane having a structure in which multiple six-membered rings constituted of a silicon atom are disposed one after another, and expressed by a compositional formula, (SiH)n; and the nanometer-size silicon material including silicon, and a halogen element wherein the halogen element is included in a molar fraction of 11.5 or less to a molar amount of the silicon taken as 100. Since the content of halogen has been reduced, an electric storage apparatus using the negative-electrode active material for one of the negative electrodes has an upgraded capacity maintained rate.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: November 27, 2018
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventor: Kayoko Yukawa
  • NEGATIVE-ELECTRODE ACTIVE MATERIAL, PRODUCTION PROCESS FOR THE SAME AND ELECTRIC STORAGE APPARATUS
    Publication number: 20160006022
    Abstract: A negative-electrode active material is used, the negative-electrode active material including: a nanometer-size silicon material produced by heat treating a lamellar polysilane having a structure in which multiple six-membered rings constituted of a silicon atom are disposed one after another, and expressed by a compositional formula, (SiH)n; and the nanometer-size silicon material including silicon, and a halogen element wherein the halogen element is included in a molar fraction of 11.5 or less to a molar amount of the silicon taken as 100. Since the content of halogen has been reduced, an electric storage apparatus using the negative-electrode active material for one of the negative electrodes has an upgraded capacity maintained rate.
    Type: Application
    Filed: January 31, 2014
    Publication date: January 7, 2016
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventor: Kayoko YUKAWA