Patents by Inventor Eun-Ok Oh

Eun-Ok Oh 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).

  • Positive active material for rechargeable lithium battery and rechargeable lithium battery including same
    Patent number: 11063252
    Abstract: A positive active material including a core including a lithium intercalation compound and a coating compound on a surface of the core, the coating compound including Li2MO3 and a solid electrolyte compound represented by Chemical Formula 1 [Li1.3+4xAl0.3M1.7?x(PO4)3], wherein 0?x?0.7, and M is an element selected from Ti, Cr, Ga, Fe, Sc, In, Y, La, Mg, Sr, and combinations thereof; and a rechargeable lithium battery includes the positive active material.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: July 13, 2021
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Eun-Ok Oh
  • Method of producing cobalt-coated precursor, cobalt-coated precursor produced thereby, and positive electrode active material prepared using same
    Patent number: 11031593
    Abstract: The present invention relates to a method of producing a cobalt-coated precursor, the cobalt-coated precursor produced by the method and a positive electrode active material for a lithium secondary battery, the positive electrode active material which is prepared using the cobalt-coated precursor and, more particularly, to a method of preparing a new positive electrode active material having improved high capacity and stability by coating cobalt on the surface of a precursor in the precursor step, thereby improving characteristics of the precursor degraded when washed with water, and a positive electrode active material prepared by the method.
    Type: Grant
    Filed: January 2, 2017
    Date of Patent: June 8, 2021
    Assignees: ECOPRO BM CO., LTD., SAMSUNG SDI CO., LTD.
    Inventors: Moon Ho Choi, Jong Seung Shin, Hyun Jong Yu, Suk Yong Jeon, Eun Ok Oh, Sang Wook Lee, Yoon Young Choi
  • METHOD OF PRODUCING COBALT-COATED PRECURSOR, COBALT-COATED PRECURSOR PRODUCED THEREBY, AND POSITIVE ELECTRODE ACTIVE MATERIAL PREPARED USING SAME
    Publication number: 20190020026
    Abstract: The present invention relates to a method of producing a cobalt-coated precursor, the cobalt-coated precursor produced by the method and a positive electrode active material for a lithium secondary battery, the positive electrode active material which is prepared using the cobalt-coated precursor and, more particularly, to a method of preparing a new positive electrode active material having improved high capacity and stability by coating cobalt on the surface of a precursor in the precursor step, thereby improving characteristics of the precursor degraded when washed with water, and a positive electrode active material prepared by the method.
    Type: Application
    Filed: January 2, 2017
    Publication date: January 17, 2019
    Applicants: Ecopro BM Co., Ltd., Samsung SDI Co., Ltd.
    Inventors: Moon Ho CHOI, Jong Seung SHIN, Hyun Jong YU, Suk Yong JEON, Eun Ok OH, Sang Wook LEE, Yoon Young CHOI
  • Positive active material for rechargeable lithium battery, method of preparing same, and rechargeable lithium battery including same
    Patent number: 10115965
    Abstract: A positive active material for a rechargeable lithium battery including a core including a compound being capable of intercalating and deintercalating lithium; and the lithium metal phosphate positioned on the surface of the core, wherein the lithium metal phosphate is represented by Chemical Formula 1, a method of preparing the same, and a rechargeable lithium battery including the same. Li1+(x+y)InxMyTi2-(x+y)(PO4)3??Chemical Formula 1 In Chemical Formula 1, M, x and y are the same as defined in the detailed description.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: October 30, 2018
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Eun-Ok Oh
  • POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME
    Publication number: 20170271655
    Abstract: A positive active material including a core including a lithium intercalation compound and a coating compound on a surface of the core, the coating compound including Li2MO3 and a solid electrolyte compound represented by Chemical Formula 1 (wherein M is an element selected from Ti, Cr, Ga, Fe, Sc, In, Y, La, Mg, Sr, and combinations thereof): [Chemical Formula 1] Li1.3+4xAl0.3M1.7?x(PO4)3. In Chemical Formula 1, 0?x?0.7, and M may be an element selected from Ti, Cr, Ga, Fe, Sc, In, Y, La, Mg, Sr, and combinations thereof. A rechargeable lithium battery includes the positive active material.
    Type: Application
    Filed: March 8, 2017
    Publication date: September 21, 2017
    Inventor: Eun-Ok Oh
  • POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, METHOD OF PREPARING SAME, AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME
    Publication number: 20160043388
    Abstract: A positive active material for a rechargeable lithium battery including a core including a compound being capable of intercalating and deintercalating lithium; and the lithium metal phosphate positioned on the surface of the core, wherein the lithium metal phosphate is represented by Chemical Formula 1, a method of preparing the same, and a rechargeable lithium battery including the same. Li1+(x+y)InxMyTi2-(x+y)(PO4)3 ??Chemical Formula 1 In Chemical Formula 1, M, x and y are the same as defined in the detailed description.
    Type: Application
    Filed: June 10, 2015
    Publication date: February 11, 2016
    Inventor: Eun-Ok Oh