Patents by Inventor Masami Ookuma

Masami Ookuma 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).

  • Active material for negative electrodes of nonaqueous secondary batteries, and nonaqueous secondary battery
    Patent number: 10950363
    Abstract: An active material having a high capacity for negative electrodes of nonaqueous secondary batteries is provided by pyrolysis of a composite resin (A) which has a silanol group and/or a hydrolysable silyl group and which contains a polysiloxane segment (a1) and a polymer segment (a2) other than the polysiloxane segment (a1), and furthermore, a negative electrode using the above active material and a nonaqueous secondary battery including the above negative electrode are also provided. In addition, by pyrolysis of a dispersion liquid obtained from the composite resin (A), silicon particles, and an organic solvent, an active material having a high capacity for negative electrodes of nonaqueous secondary batteries is provided, and furthermore, a negative electrode using the above active material and a nonaqueous secondary battery including the above negative electrode are also provided.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: March 16, 2021
    Assignee: DIC CORPORATION
    Inventors: Takayuki Miki, Yasuhiro Takada, Shinichi Nonaka, Masami Ookuma, Kiyoo Kamei, Toshinori Nishiyama
  • ACTIVE MATERIAL FOR NEGATIVE ELECTRODES OF NONAQUEOUS SECONDARY BATTERIES, AND NONAQUEOUS SECONDARY BATTERY
    Publication number: 20180053937
    Abstract: An active material having a high capacity for negative electrodes of nonaqueous secondary batteries is provided by pyrolysis of a composite resin (A) which has a silanol group and/or a hydrolysable silyl group and which contains a polysiloxane segment (a1) and a polymer segment (a2) other than the polysiloxane segment (a1), and furthermore, a negative electrode using the above active material and a nonaqueous secondary battery including the above negative electrode are also provided. In addition, by pyrolysis of a dispersion liquid obtained from the composite resin (A), silicon particles, and an organic solvent, an active material having a high capacity for negative electrodes of nonaqueous secondary batteries is provided, and furthermore, a negative electrode using the above active material and a nonaqueous secondary battery including the above negative electrode are also provided.
    Type: Application
    Filed: October 26, 2017
    Publication date: February 22, 2018
    Applicant: DIC CORPORATION
    Inventors: Takayuki Miki, Yasuhiro Takada, Shinichi Nonaka, Masami Ookuma, Kiyoo Kamei, Toshinori Nishiyama
  • ACTIVE MATERIAL FOR NEGATIVE ELECTRODES OF NONAQUEOUS SECONDARY BATTERIES, AND NONAQUEOUS SECONDARY BATTERY
    Publication number: 20150340695
    Abstract: An active material having a high capacity for negative electrodes of nonaqueous secondary batteries is provided by pyrolysis of a composite resin (A) which has a silanol group and/or a hydrolysable silyl group and which contains a polysiloxane segment (a1) and a polymer segment (a2) other than the polysiloxane segment (a1), and furthermore, a negative electrode using the above active material and a nonaqueous secondary battery including the above negative electrode are also provided. In addition, by pyrolysis of a dispersion liquid obtained from the composite resin (A), silicon particles, and an organic solvent, an active material having a high capacity for negative electrodes of nonaqueous secondary batteries is provided, and furthermore, a negative electrode using the above active material and a nonaqueous secondary battery including the above negative electrode are also provided.
    Type: Application
    Filed: December 17, 2013
    Publication date: November 26, 2015
    Applicant: DIC CORPORATION
    Inventors: Takayuki Miki, Yasuhiro Takada, Shinichi Nonaka, Masami Ookuma, Kiyoo Kamei, Toshinori Nishiyama