Patents by Inventor Myong-A Woo

Myong-A Woo 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).

  • Patent number: 10868300
    Abstract: A positive active material for a rechargeable lithium battery including a core including at least one selected from a nickel-based composite oxide represented by Chemical Formula 1 or a lithium manganese oxide represented by Chemical Formula 2; and a coating layer on a surface of the core and including a lithium metal oxide represented by Chemical Formula 3, the positive active material having a peak at a 2? value of about 19° to about 22° and another peak at a 2? value of about 40° to about 45° in an X-ray diffraction pattern using a CuK? ray, is disclosed. A method of preparing the same, and a rechargeable lithium battery including the same, are also disclosed. LiNixCoyMn1-x-yO2??Chemical Formula 1 LiaMnbOc??Chemical Formula 2 Li2MO3??Chemical Formula 3 In Chemical Formulae 1 to 3, x, y, a, b, c, and M are the same as in the detailed description.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: December 15, 2020
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Ming-Zi Hong, Do-Hyung Park, Seon-Young Kwon, Joong-Ho Moon, Ji-Hyun Kim, Han-Eol Park, Min-Han Kim, Myong-A Woo, Ki-Hyun Kim, Jong-Seo Choi
  • Patent number: 9716273
    Abstract: A positive active material for a rechargeable lithium battery includes a lithium composite metal oxide represented by Chemical Formula 1. A method of preparing the positive active material includes adding a lithium metal oxide represented by Chemical Formula 2 to a Zr salt-containing solution to obtain a mixed solution, drying the mixed solution to obtain a dried product, and heat-treating the dried product to prepare a lithium composite metal oxide represented by Chemical Formula 1. A rechargeable lithium battery includes a positive electrode including the positive active material. LiaZrbNicCodMeZrfO2??[Chemical Formula 1] where, 0.9?a?1.1, 0<b?0.1, 0?c?1, 0?d?1, 0?e?1, 0?f?0.1, 0.9?a+b?1.1, c+d+e+f=1, and M is Mn or Al, LiaNigCohMiO2??[Chemical Formula 2] where, 0.9?a?1.1, 0?g?1, 0?h?1, 0?i?1, g+h+i=1 and M is Mn or Al.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: July 25, 2017
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Ming-Zi Hong, Do-Hyung Park, Seon-Young Kwon, Joong-Ho Moon, Ji-Hyun Kim, Han-Eol Park, Min-Han Kim, Myong-A Woo, Ki-Hyun Kim, Jong-Seo Choi
  • Patent number: 9564628
    Abstract: In one aspect, a composite cathode active material including at least one large-diameter active material, and at least one small-diameter active material, a cathode including the composite cathode active material and a lithium battery including the cathode is provided.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: February 7, 2017
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Ji-Hyun Kim, Do-Hyung Park, Seon-Young Kwon, Min-Han Kim, Joong-Ho Moon, Kyoung-Hyun Kim, Han-Eol Park, Ki-Hyun Kim, Ming-Zi Hong, Myong-A Woo
  • Publication number: 20150147651
    Abstract: A positive active material for a rechargeable lithium battery including a core including at least one selected from a nickel-based composite oxide represented by Chemical Formula 1 or a lithium manganese oxide represented by Chemical Formula 2; and a coating layer on a surface of the core and including a lithium metal oxide represented by Chemical Formula 3, the positive active material having a peak at a 2? value of about 19° to about 22° and another peak at a 2? value of about 40° to about 45° in an X-ray diffraction pattern using a CuK? ray, is disclosed. A method of preparing the same, and a rechargeable lithium battery including the same, are also disclosed. LiNixCoyMn1-x-yO2??Chemical Formula 1 LiaMnbOc??Chemical Formula 2 Li2MO3??Chemical Formula 3 In Chemical Formulae 1 to 3, x, y, a, b, c, and M are the same as in the detailed description.
    Type: Application
    Filed: May 19, 2014
    Publication date: May 28, 2015
    Applicant: SAMSUNG SDI CO., LTD.
    Inventors: Ming-Zi Hong, Do-Hyung Park, Seon-Young Kwon, Joong-Ho Moon, Ji-Hyun Kim, Han-Eol Park, Min-Han Kim, Myong-A Woo, Ki-Hyun Kim, Jong-Seo Choi
  • Publication number: 20150017537
    Abstract: A positive active material for a rechargeable lithium battery includes a lithium composite metal oxide represented by Chemical Formula 1. A method of preparing the positive active material includes adding a lithium metal oxide represented by Chemical Formula 2 to a Zr salt-containing solution to obtain a mixed solution, drying the mixed solution to obtain a dried product, and heat-treating the dried product to prepare a lithium composite metal oxide represented by Chemical Formula 1. A rechargeable lithium battery includes a positive electrode including the positive active material. LiaZrbNicCodMeZrfO2??[Chemical Formula 1] where, 0.9?a?1.1, 0<b?0.1, 0?c?1, 0?d?1, 0?e?1, 0?f?0.1, 0.9?a+b?1.1, c+d+e+f=1, and M is Mn or Al, LiaNigCohMiO2??[Chemical Formula 2] where, 0.9?a?1.1, 0?g?1, 0?h?1, 0?i?1, g+h+i=1 and M is Mn or Al.
    Type: Application
    Filed: July 11, 2014
    Publication date: January 15, 2015
    Inventors: Ming-Zi Hong, Do-Hyung Park, Seon-Young Kwon, Joong-Ho Moon, Ji-Hyun Kim, Han-Eol Park, Min-Han Kim, Myong-A Woo, Ki-Hyun Kim, Jong-Seo Choi
  • Publication number: 20150017535
    Abstract: A cathode active material, a preparation method thereof, and a cathode for a lithium secondary battery and a lithium secondary battery including the cathode active material, wherein the cathode active material includes a core active material represented by Formula 1 below; and a coating layer formed on a surface of the core active material, the coating layer including lithium gallium oxide: Lia(A1-x-yBxCy)O2 ??Formula 1 In Formula 1, a, x, y, A, B, and C are defined in the detailed description.
    Type: Application
    Filed: November 19, 2013
    Publication date: January 15, 2015
    Applicant: SAMSUNG SDI CO., LTD.
    Inventors: Ming-Zi Hong, Do-Hyung Park, Seon-Young Kwon, Joong-Ho Moon, Ji-Hyun Kim, Han-Eol Park, Min-Han Kim, Myong-A Woo, Ki-Hyun Kim, Sun-Ho Kang
  • Publication number: 20130302685
    Abstract: In one aspect, a composite cathode active material including at least one large-diameter active material, and at least one small-diameter active material, a cathode including the composite cathode active material and a lithium battery including the cathode is provided.
    Type: Application
    Filed: September 11, 2012
    Publication date: November 14, 2013
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Ji-Hyun Kim, Do-Hyung Park, Seon-Young Kwon, Min-Han Kim, Joong-Ho Moon, Kyoung-Hyun Kim, Han-Eol Park, Ki-Hyun Kim, Ming-Zi Hong, Myong-A Woo