Patents by Inventor Na-Leum Yoo

Na-Leum Yoo 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 lithium secondary battery and lithium secondary battery
    Patent number: 9893348
    Abstract: In an aspect, a positive active material for a rechargeable lithium battery including: a compound that reversibly intercalates and deintercalates lithium; and a coating layer coating the compound and including a metal nitrate is disclosed. Since the positive active material is structurally stable during the charge and discharge, the obtained battery may have excellent battery capacity and cycle-life characteristics and also have high power.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: February 13, 2018
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Young-Ki Kim, Young-Hun Lee, Na-Leum Yoo, Na-Ri Park, Soon-Rewl Lee, Hong-Kyu Choi, Yong-Chul Park, Ick-Kyu Choi
  • Rechargeable lithium battery comprising positive electrode comprising sacrificial positive active material
    Patent number: 9653726
    Abstract: A rechargeable lithium battery including a negative electrode including a silicon-based negative active material; a positive electrode including a positive active material including a sacrificial positive active material selected from lithium nickel oxides, lithium molybdenum oxides, and combinations thereof; and a non-aqueous electrolyte, is disclosed.
    Type: Grant
    Filed: July 23, 2013
    Date of Patent: May 16, 2017
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Soon-Rewl Lee, Ick-Kyu Choi, Young-Ki Kim, Young-Hun Lee, Na-Leum Yoo, Na-Ri Park, Yong-Chul Park
  • Method for preparing positive active material for rechargeable lithium battery and rechargeable lithium battery including positive active material
    Patent number: 9573820
    Abstract: A rechargeable lithium battery includes a non-aqueous electrolyte, a negative electrode including a silicon-based negative active material, and a positive active material including a compound represented by a Chemical Formula 1, Li1+xCo1?yMyO2, wherein, ?0.2?x?0.2, 0<y?0.2, and M includes Ni and one selected from Mn, B, Mg, Ca, Sr, Ba, Ti, V, Cr, Fe, Cu, Al, and a combination thereof.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: February 21, 2017
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Young-Ki Kim, Young-Hun Lee, Na-Leum Yoo, Na-Ri Park, Soon-Rewl Lee, Ick-Kyu Choi, Yong-Chul Park
  • Rechargeable lithium battery
    Patent number: 9478799
    Abstract: In an aspect, a rechargeable lithium battery including a negative electrode including a silicon-based negative active material is disclosed.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: October 25, 2016
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Soon-Rewl Lee, Ick-Kyu Choi, Young-Ki Kim, Young-Hun Lee, Na-Leum Yoo, Na-Ri Park, Yong-Chul Park
  • Composite cathode active material, cathode and lithium battery including the composite cathode active material, and preparation method thereof
    Patent number: 9246166
    Abstract: In an aspect, a composite cathode active material a cathode and a lithium battery including the composite cathode active material, and a method of preparing the composite cathode active material is disclosed.
    Type: Grant
    Filed: May 16, 2013
    Date of Patent: January 26, 2016
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Young-Hun Lee, Soon-Rewl Lee, Na-Ri Park, Young-Ki Kim, Na-Leum Yoo, Ick-Kyu Choi, Yong-Chul Park
  • Cathode active material having manganese oxide and boron, cathode and lithium battery including cathode active material, and method of preparing the cathode active material
    Patent number: 9077023
    Abstract: A cathode active material including: a lithium manganese oxide of which primary particles has a diameter of 1 ?m or more and which has a spinel structure in which an X-ray diffraction (XRD) peak intensity ratio of I(111)/I(311) is 1.0 or more; and a boron element disposed at least one position selected from the group consisting of inside the primary particles and on surfaces of the primary particles.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: July 7, 2015
    Assignee: SAMSUNG SDI CO., LTD.
    Inventors: Min-Ju Kim, Yong-Chul Park, Gyeong-Jae Heo, Hyun-Deok Lee, Mi-Ran Song, Jin-Hyoung Seo, Na-Leum Yoo
  • Positive active material, method of preparing the same, and lithium battery including the positive active material
    Patent number: 8877380
    Abstract: A positive active material, a method of preparing the same, and a lithium secondary battery including the positive active material.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: November 4, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Hyun-Deok Lee, Yong-Chul Park, Mi-Ran Song, Na-Leum Yoo, Jin-Hyoung Seo, Min-Ju Kim, Gyeong-Jae Heo, Jae-Dong Byun, Sun-Youn Ryou
  • METHOD FOR PREPARING POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY INCLUDING POSITIVE ACTIVE MATERIAL
    Publication number: 20140295274
    Abstract: A rechargeable lithium battery includes a non-aqueous electrolyte, a negative electrode including a silicon-based negative active material, and a positive active material including a compound represented by a Chemical Formula 1, Li1+xCo1?yMyO2, wherein, ?0.2?x?0.2, 0<y?0.2, and M includes Ni and one selected from Mn, B, Mg, Ca, Sr, Ba, Ti, V, Cr, Fe, Cu, Al, and a combination thereof.
    Type: Application
    Filed: February 18, 2014
    Publication date: October 2, 2014
    Applicant: SAMSUNG SDI CO., LTD.
    Inventors: Young-Ki Kim, Young-Hun Lee, Na-Leum Yoo, Na-Ri Park, Soon-Rewl Lee, Ick-Kyu Choi, Yong-Chul Park
  • RECHARGEABLE LITHIUM BATTERY
    Publication number: 20140220455
    Abstract: A rechargeable lithium battery including a negative electrode including a silicon-based negative active material; a positive electrode including a positive active material including a sacrificial positive active material selected from lithium nickel oxides, lithium molybdenum oxides, and combinations thereof; and a non-aqueous electrolyte, is disclosed.
    Type: Application
    Filed: July 23, 2013
    Publication date: August 7, 2014
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Soon-Rewl Lee, Ick-Kyu Choi, Young-Ki Kim, Young-Hun Lee, Na-Leum Yoo, Na-Ri Park, Yong-Chul Park
  • POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY
    Publication number: 20140212745
    Abstract: In an aspect, a positive active material for a rechargeable lithium battery including: a compound that reversibly intercalates and deintercalates lithium; and a coating layer coating the compound and including a metal nitrate is disclosed. Since the positive active material is structurally stable during the charge and discharge, the obtained battery may have excellent battery capacity and cycle-life characteristics and also have high power.
    Type: Application
    Filed: May 8, 2013
    Publication date: July 31, 2014
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Young-Ki Kim, Young-Hun Lee, Na-Leum Yoo, Na-Ri Park, Soon-Rewl Lee, Hong-Kyu Choi, Yong-Chul Park, Ick-Kyu Choi
  • COMPOSITE CATHODE ACTIVE MATERIAL, CATHODE AND LITHIUM BATTERY INCLUDING THE COMPOSITE CATHODE ACTIVE MATERIAL, AND PREPARATION METHOD THEREOF
    Publication number: 20140205898
    Abstract: In an aspect, a composite cathode active material a cathode and a lithium battery including the composite cathode active material, and a method of preparing the composite cathode active material is disclosed.
    Type: Application
    Filed: May 16, 2013
    Publication date: July 24, 2014
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Young-Hun Lee, Soon-Rewl Lee, Na-Ri Park, Young-Ki Kim, Na-Leum Yoo, Ick-Kyu Choi, Yong-Chul Park
  • RECHARGEABLE LITHIUM BATTERY
    Publication number: 20140050985
    Abstract: In an aspect, a rechargeable lithium battery including a negative electrode including a silicon-based negative active material is disclosed.
    Type: Application
    Filed: March 13, 2013
    Publication date: February 20, 2014
    Applicant: SAMSUNG SDI CO., LTD.
    Inventors: Soon-Rewl Lee, Ick-Kyu Choi, Young-Ki Kim, Young-Hun Lee, Na-Leum Yoo, Na-Ri Park, Yong-Chul Park
  • POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD OF PREPARING THE SAME, POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY INCLUDING THE POSITIVE ACTIVE MATERIAL, AND LITHIUM SECONDARY BATTERY EMPLOYING THE POSITIVE ELECTRODE
    Publication number: 20130344386
    Abstract: A positive active material for a lithium secondary battery is a compound represented by Formula 1 and is in a form of primary particles having a particle diameter in a range of 80 to 400 nm. Formula 1: LiaNixCoyMnzM1-x-y-zO2, wherein metal M is selected from the group of B, Cr, V, Ti, Fe, Zr, Zn, Si, Y, Nb, Ga, Sn, Mo, and W, 1.0?a?1.2, 0.9?x?0.95, 0.1?y?0.5, 0.0?z?0.7, and 0.0<1?x?y?z?0.3.
    Type: Application
    Filed: February 7, 2013
    Publication date: December 26, 2013
    Applicant: SAMSUNG SDI CO., LTD.
    Inventors: Do-Yu KIM, Jin-Hyoung SEO, Mi-Ran SONG, Yong-Chul PARK, Gyeong-Jae HEO, Hyun-Deok LEE, Yong-Seon KIM, Min-Ju KIM, Na-Leum YOO
  • POSITIVE ELECTRODE, METHOD OF MANUFACTURING THE SAME, AND LITHIUM BATTERY COMPRISING THE POSITIVE ELECTRODE
    Publication number: 20130196227
    Abstract: A positive electrode including a current collector and a positive active material layer formed on the current collector, wherein the positive active material layer includes a positive active material, a conductive agent, and the boron-containing inorganic binder having a network structure; a method of manufacturing the same; and a lithium battery including the positive electrode.
    Type: Application
    Filed: August 9, 2012
    Publication date: August 1, 2013
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Hyun-Deok LEE, Yong-Chul Park, Mi-Ran Song, Jin-Hyoung Seo, Min-Ju Kim, Na-Leum Yoo, Gyeong-Jae Heo
  • CATHODE ACTIVE MATERIAL, CATHODE AND LITHIUM BATTERY INCLUDING CATHODE ACTIVE MATERIAL, AND METHOD OF PREPARING THE CATHODE ACTIVE MATERIAL
    Publication number: 20120177994
    Abstract: A cathode active material including: a lithium manganese oxide of which primary particles has a diameter of 1 ?m or more and which has a spinel structure in which an X-ray diffraction (XRD) peak intensity ratio of I(111)/I(311) is 1.0 or more; and a boron element disposed at least one position selected from the group consisting of inside the primary particles and on surfaces of the primary particles.
    Type: Application
    Filed: September 23, 2011
    Publication date: July 12, 2012
    Applicant: SAMSUNG SDI CO., LTD.
    Inventors: Min-Ju KIM, Yong-Chul PARK, Gyeong-Jae HEO, Hyun-Deok LEE, Mi-Ran SONG, Jin-Hyoung SEO, Na-Leum YOO
  • POSITIVE ACTIVE MATERIAL, METHOD OF PREPARING THE SAME, AND LITHIUM BATTERY INCLUDING THE POSITIVE ACTIVE MATERIAL
    Publication number: 20120064411
    Abstract: A positive active material, a method of preparing the same, and a lithium secondary battery including the positive active material.
    Type: Application
    Filed: August 2, 2011
    Publication date: March 15, 2012
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Hyun-Deok LEE, Yong-Chul Park, Mi-Ran Song, Na-Leum Yoo, Jin-Hyoung Seo, Min-Ju Kim, Gyeong-Jae Heo, Jae-Dong Byun, Sun-Youn Ryou