Patents by Inventor Irina D. Gocheva

Irina D. Gocheva 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).

  • Method for producing iron oxyfluoride positive electrode active substance and iron oxyflouride positive electrode active substance
    Patent number: 9312538
    Abstract: Provided is a technology for producing a positive electrode active substance mainly composed of FeOF having a sufficient charge-discharge capacity, in the short-time and easy manner. Also provided is a positive electrode active substance mainly composed of FeOF. The method for producing the positive electrode active substance mainly composed of FeOF comprises the steps of admixing iron oxide Fe2O3 and iron fluoride FeF3 both in solid states, and melt-quenching the mixture in an atmosphere of inert gas. The positive electrode active substance mainly composed of FeOF is composed of not less than 50% by weight of FeOF with a remainder being iron fluoride FeF3 and/or iron oxide Fe2O3.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: April 12, 2016
    Assignee: Kyushu University, National University Corporation
    Inventors: Shigeto Okada, Ayuko Kitajou, Hideyuki Komatsu, Irina D. Gocheva, Kuniko Chihara, Junichi Yamaki
  • METHOD FOR PRODUCING IRON OXYFLUORIDE POSITIVE ELECTRODE ACTIVE SUBSTANCE AND IRON OXYFLOURIDE POSITIVE ELECTRODE ACTIVE SUBSTANCE
    Publication number: 20140291573
    Abstract: Provided is a technology for producing a positive electrode active substance mainly composed of FeOF having a sufficient charge-discharge capacity, in the short-time and easy manner. Also provided is a positive electrode active substance mainly composed of FeOF. The method for producing the positive electrode active substance mainly composed of FeOF comprises the steps of admixing iron oxide Fe2O3 and iron fluoride FeF3 both in solid states, and melt-quenching the mixture in an atmosphere of inert gas. The positive electrode active substance mainly composed of FeOF is composed of not less than 50% by weight of FeOF with a remainder being iron fluoride FeF3 and/or iron oxide Fe2O3.
    Type: Application
    Filed: June 22, 2012
    Publication date: October 2, 2014
    Applicant: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Shigeto Okada, Ayuko Kitajou, Hideyuki Komatsu, Irina D. Gocheva, Kuniko Chihara, Junichi Yamaki
  • Cathode active material for non-aqueous electrolyte secondary battery and manufacturing method of the same
    Patent number: 8454925
    Abstract: In a non-aqueous electrolyte secondary battery, in order to adjust a cathode active material in which guest cation such as Na and Li is included, alkaline metal fluoride which is expressed by a general formula AF and transition metal fluoride which is expressed by a formula M? F2 are subjected to a mechanical milling process to produce metal fluoride compound AM? F3. The mechanical milling process desirably uses a planetary ball mill.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: June 4, 2013
    Assignees: Mitsubishi Heavy Industries, Ltd., Kyushu University, National University Corporation
    Inventors: Shigeto Okada, Manabu Nishijima, Takayuki Doi, Jun-ichi Yamaki, Irina D. Gocheva, Toshiyasu Kiyabu
  • CATHODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND MANUFACTURING METHOD OF THE SAME
    Publication number: 20100035155
    Abstract: In a non-aqueous electrolyte secondary battery, in order to adjust a cathode active material in which guest cation such as Na and Li is included, alkaline metal fluoride which is expressed by a general formula AF and transition metal fluoride which is expressed by a formula M? F2 are subjected to a mechanical milling process to produce metal fluoride compound AM? F3. The mechanical milling process desirably uses a planetary ball mill.
    Type: Application
    Filed: November 16, 2007
    Publication date: February 11, 2010
    Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Shigeto Okada, Manabu Nishijima, Takayuki Doi, Jun-ichi Yamaki, Irina D. Gocheva, Toshiyasu Kiyabu