Patents by Inventor Young-Bae Roh

Young-Bae Roh 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).

  • Publication number: 20230238524
    Abstract: The present invention relates to a positive electrode active material containing a spinel composite solid solution oxide, a method for manufacturing same, and a lithium secondary battery including the same. The spinel composite solid solution oxide contains cubic (P4332) and face-centered cubic (Fd-3m) in an optimized solid solution ratio in the crystal, and a low content of lithium nickel oxide (LizNi1?zO) is combined. A positive electrode active material containing the spinel composite solid solution oxide provides excellent output characteristics while having stable cycle-life characteristics according to the type and content of doping elements replacing transition metals, the synthesis temperature, and the amount of impurities generated.
    Type: Application
    Filed: March 16, 2021
    Publication date: July 27, 2023
    Inventors: Whan Jin ROH, Young Bae ROH, Byung Su JUNG, Hyunmin KIM, Woogyu HAN
  • Publication number: 20170373339
    Abstract: A secondary battery or a cylindrical lithium secondary battery is generally described. An exemplary lithium secondary battery module includes: an electrode assembly; a first current collector plate; and a second current collector plate. The electrode assembly is formed by winding an anode plate having a first uncoated region formed on one side, a cathode plate having a second uncoated region formed on the other side, and a separator disposed between the anode plate and the cathode plate. The first current collector plate is electrically connected to the first uncoated region through direct contact therewith, and the second current collector plate is electrically connected to the second uncoated region through direct contact therewith. The second uncoated region of the cathode plate and the first uncoated region of the anode plate are formed of the same metal material.
    Type: Application
    Filed: September 8, 2017
    Publication date: December 28, 2017
    Applicant: EIG LTD.
    Inventors: Seong Gyu Cho, Hyung Ki Kang, Kyung II Kim, Myeong Seok Kim, Young Bae Roh
  • Patent number: 7422827
    Abstract: Disclosed is a nonaqueous electrolyte for a lithium-ion secondary battery that contains an addictive for preventing destruction of a solid electrolyte interface (SEI) layer and hence decomposition of the electrolyte that may cause generation of a gas, thereby preventing swelling of the battery caused by the gas generated from the inside of the battery at a high temperature. More specifically, the present invention provides an electrolyte that includes, as an additive, 2-sulfobenzoic acid cyclic anhydride represented by the formula 1: The electrolyte contains the additive in an amount of 0.1 to 10.0 wt. %.
    Type: Grant
    Filed: October 19, 2001
    Date of Patent: September 9, 2008
    Assignee: E Square Technologies Co., Ltd.
    Inventors: Young Gyu Kim, Seung Kee Kim, Min Seong Kim, Young Bae Roh
  • Patent number: 7258951
    Abstract: A lithium secondary battery exhibiting good mechanical properties and using a thin negative current collector is provided. The lithium secondary battery includes a positive electrode formed by coating lithium metal oxides on a positive current collector and a negative electrode formed by coating carbonaceous materials or SnO2 on a negative current collector. The negative current collector is made of a Cu-based alloy foil with a thickness of 20 ?m or less and the Cu-based alloy foil includes at least one material selected from the group consisting of nickel, titanium, magnesium, tin, zinc, boron, chromium, manganese, silicone, cobalt, iron, vanadium, aluminum, zirconium, niobium, phosphorous, bismuth, lead, silver and misch metal. The lithium secondary battery further includes a separator interposed between the positive and negative electrodes and an electrolyte into which the positive and negative electrodes and the separator are immersed.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: August 21, 2007
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Il-Ki Woo, Sang-Won Lee, Jung-Joon Park, Young-Bae Roh, Kwang-Sik Kim
  • Publication number: 20050008941
    Abstract: Disclosed is a nonaqueous electrolyte for a lithium-ion secondary battery that contains an addictive for preventing destruction of a solid electrolyte interface (SEI) layer and hence decomposition of the electrolyte that may cause generation of a gas, thereby preventing swelling of the battery caused by the gas generated from the inside of the battery at a high temperature. More specifically, the present invention provides an electrolyte that includes, as an additive, 2-sulfobenzoic acid cyclic anhydride represented by the formula 1: The electrolyte contains the additive in an amount of 0.1 to 10.0 wt. %.
    Type: Application
    Filed: October 19, 2001
    Publication date: January 13, 2005
    Inventors: Young-Gyu Kim, Seung-Kee Kim, Min-Seong Kim, Young-Bae Roh
  • Patent number: 6756155
    Abstract: Disclosed is a positive active material for a rechargeable lithium battery. The active material includes a cobalt-based compound selected from the group consisting of the compounds represented by the formulas 1 to 4. The active material has a structure of secondary particles with a size of 10 to 30 &mgr;m and the secondary particle is gathered with primary particles with a size of 1 to 5 &mgr;m. The active material includes a metallic oxide coated on the cobalt-based compound. LiCoA2  (1) LiCoO2-xBx  (2) LiCo1-xMxA2  (3) LiCo1-xMxO2-yBy  (4) where A is selected from the group consisting of O, S, F and P, B is selected from the group consisting of S, F and P, M is a transition metal selected from Al, Mg, Cr or Mn; Sr; or lanthanide metal selected from La or Ce; 0<x<1 and 0<y<1.
    Type: Grant
    Filed: February 16, 2000
    Date of Patent: June 29, 2004
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Ho-Jin Kweon, Seung-Kee Kim, Sang-Moon Hwang, Young-Bae Roh
  • Publication number: 20040043291
    Abstract: Disclosed herein are a lithium-sulfur battery and a method of manufacturing the same, whose cathode is manufactured by adding a binder mixture of two or more materials so as to develop pores within a cathode plate, so that does not exhibit shortcomings, including deterioration in cycle life characteristic, electrolyte leakage, deposition of lithium sulfide (Li2S) and a reduction in discharge capacity at high rate discharge. More specifically, disclosed herein is a cathode for lithium-sulfur batteries and a method of manufacturing the same, which is manufactured using a multicomponent binder mixture consisting of polytetrafluoroethylene and a thickener. Also, disclosed herein are a lithium-sulfur battery and a method of manufacturing the same, which is manufactured using the above cathode so as to develop pores within the electrode plate, so that the battery exhibits the extended cycle life, the non-leakage of electrolytes and the improved discharge capacity at high rate discharge.
    Type: Application
    Filed: September 4, 2002
    Publication date: March 4, 2004
    Inventors: Nam In Kim, Chae Bong Lee, Won Jae Lee, Young Bae Roh
  • Publication number: 20020192554
    Abstract: A lithium secondary battery exhibiting good mechanical properties and using a thin negative current collector is provided. The lithium secondary battery includes a positive electrode formed by coating lithium metal oxides on a positive current collector and a negative electrode formed by coating carbonaceous materials or SnO2 on a negative current collector. The negative current collector is made of a Cu-based alloy foil with a thickness of 20 &mgr;m or less and the Cu-based alloy foil includes at least one material selected from the group consisting of nickel, titanium, magnesium, tin, zinc, boron, chromium, manganese, silicone, cobalt, iron, vanadium, aluminum, zirconium, niobium, phosphorous, bismuth, lead, silver and misch metal. The lithium secondary battery further includes a separator interposed between the positive and negative electrodes and an electrolyte into which the positive and negative electrodes and the separator are immersed.
    Type: Application
    Filed: January 25, 2000
    Publication date: December 19, 2002
    Inventors: Il-Ki Woo, Sang-Won Lee, Jung-Joon Park, Young-Bae Roh, Kwang-Sik Kim