Patents by Inventor Satoru Miyawaki

Satoru Miyawaki 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).

  • Si-C-O composite, making method, and non-aqueous electrolyte secondary cell negative electrode material
    Publication number: 20060022198
    Abstract: A Si—C—O composite powder is obtained by curing a reactive silane or siloxane having crosslinkable groups through heat curing or catalytic reaction into a crosslinked product and sintering the crosslinked product in an inert gas stream at a temperature of 700-1,400° C. into an inorganic state. It exhibits satisfactory cycle performance when used as the negative electrode material for non-aqueous electrolyte secondary cells.
    Type: Application
    Filed: July 21, 2005
    Publication date: February 2, 2006
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Mikio Aramata, Satoru Miyawaki, Hirofumi Fukuoka
  • Silicon composite, making method, and non-aqueous electrolyte secondary cell negative electrode material
    Publication number: 20060003227
    Abstract: A silicon composite comprises silicon particles whose surface is at least partially coated with a silicon carbide layer. It is prepared by subjecting a silicon powder to thermal CVD with an organic hydrocarbon gas and/or vapor at 900-1,400° C., and heating the powder for removing an excess free carbon layer from the surface through oxidative decomposition.
    Type: Application
    Filed: June 27, 2005
    Publication date: January 5, 2006
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Mikio Aramata, Satoru Miyawaki, Hirofumi Fukuoka, Kazuma Momii, Kouichi Urano
  • Silicon composite particles, preparation thereof, and negative electrode material for non-aqueous electrolyte secondary cell
    Publication number: 20050214644
    Abstract: Silicon composite particles are prepared by sintering primary fine particles of silicon, silicon alloy or silicon oxide together with an organosilicon compound. Sintering of the organosilicon compound results in a silicon-base inorganic compound which serves as a binder. Each particle has the structure that silicon or silicon alloy fine particles are dispersed in the silicon-base inorganic compound binder, and voids are present within the particle.
    Type: Application
    Filed: March 22, 2005
    Publication date: September 29, 2005
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Mikio Aramata, Satoru Miyawaki, Hirofumi Fukuoka, Kazuma Momii, Kouichi Urano
  • Lithium-containing silicon oxide powder and making method
    Patent number: 6893621
    Abstract: A lithium ion secondary cell having a high capacity, improved first charge/discharge efficiency and improved cycle performance is obtainable using as the negative electrode material a lithium-containing silicon oxide powder having the formula: SiLixOy wherein x and y are 0<x<1.0 and 0<y<1.5, with the lithium being fused and partially crystallized.
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: May 17, 2005
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Hirofumi Fukuoka, Satoru Miyawaki, Mikio Aramata, Susumu Ueno, Kazuma Momii, Takeshi Fukuda
  • Lithium ion secondary battery negative electrode material and its preparation
    Publication number: 20050031958
    Abstract: A metallic silicon-containing composite in which metallic silicon nuclei are coated with an inert material which does not contribute to adsorption and desorption of lithium ions is a useful negative electrode material for lithium ion secondary batteries. Using the composite as a negative electrode active material, a lithium ion secondary battery having a high capacity and excellent cycle performance can be fabricated.
    Type: Application
    Filed: August 4, 2004
    Publication date: February 10, 2005
    Inventors: Hirofumi Fukuoka, Mikio Aramata, Kazuma Momii, Satoru Miyawaki
  • Silicon oxide powder and making method
    Patent number: 6759160
    Abstract: A silicon oxide powder represented by the formula: SiOx wherein 1.05≦x≦1.5 and having a BET specific surface area of 5-300 m2/g is useful as a negative electrode material to construct a lithium ion secondary cell having a high capacity and improved cycle performance.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: July 6, 2004
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Hirofumi Fukuoka, Satoru Miyawaki, Kenji Oõka, Susumu Ueno, Mikio Aramata, Takeshi Fukuda
  • Non-aqueous electrolyte secondary battery negative electrode material, making method, and lithium ion secondary battery
    Publication number: 20040106040
    Abstract: A non-aqueous electrolyte secondary battery negative electrode material is provided wherein a negative electrode active material containing a lithium ion-occluding and releasing material which has been treated with an organosilicon base surface treating agent is surface coated with a conductive coating. Using the negative electrode material, a lithium ion secondary battery having a high capacity and improved cycle performance is obtainable.
    Type: Application
    Filed: November 26, 2003
    Publication date: June 3, 2004
    Inventors: Hirofumi Fukuoka, Mikio Aramata, Satoru Miyawaki, Susumu Ueno, Kazuma Momii
  • Conductive silicon composite, preparation thereof, and negative electrode material for non-aqueous electrolyte secondary cell
    Publication number: 20030215711
    Abstract: A conductive silicon composite in which particles of the structure that silicon crystallites are dispersed in silicon dioxide are coated on their surfaces with carbon affords satisfactory cycle performance when used as the negative electrode material in a non-aqueous electrolyte secondary cell.
    Type: Application
    Filed: September 19, 2002
    Publication date: November 20, 2003
    Inventors: Mikio Aramata, Satoru Miyawaki, Susumu Ueno, Hirofumi Fukuoka, Kazuma Momii
  • Conductive silicon oxide powder, preparation thereof, and negative electrode material for non-aqueous electrolyte secondary cell
    Publication number: 20030118905
    Abstract: A conductive silicon oxide powder in which particles of silicon oxide having the formula: SiOx wherein 1≦x<1.6 are covered on their surfaces with a conductive carbon coating by chemical vapor deposition treatment is useful as a negative electrode active material to construct a lithium ion secondary cell having a high capacity and improved cycle performance.
    Type: Application
    Filed: September 9, 2002
    Publication date: June 26, 2003
    Inventors: Hirofumi Fukuoka, Satoru Miyawaki, Kazuma Momii, Mikio Aramata, Susumu Ueno
  • Lithium-containing silicon oxide powder and making method
    Publication number: 20030053945
    Abstract: A lithium ion secondary cell having a high capacity, improved first charge/discharge efficiency and improved cycle performance is obtainable using as the negative electrode material a lithium-containing silicon oxide powder having the formula: SiLixOy wherein x and y are 0<x<1.0 and 0<y<1.5, with the lithium being fused and partially crystallized.
    Type: Application
    Filed: September 5, 2002
    Publication date: March 20, 2003
    Inventors: Hirofumi Fukuoka, Satoru Miyawaki, Mikio Aramata, Susumu Ueno, Kazuma Momii, Takeshi Fukuda
  • Silicon oxide powder and making method
    Publication number: 20020159941
    Abstract: A silicon oxide powder represented by the formula: SiOx wherein 1.05≦x≦1.5 and having a BET specific surface area of 5-300 m2/g is useful as a negative electrode material to construct a lithium ion secondary cell having a high capacity and improved cycle performance.
    Type: Application
    Filed: February 26, 2002
    Publication date: October 31, 2002
    Inventors: Hirofumi Fukuoka, Satoru Miyawaki, Kenji Ooka, Susumu Ueno, Mikio Aramata, Takeshi Fukuda