Patents by Inventor Jung Woo Yoo

Jung Woo 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).

  • Publication number: 20170012252
    Abstract: Disclosed herein is a battery cell configured to have a structure in which an electrode assembly is mounted in a battery case made of a laminate sheet including a resin layer and a metal layer, and the battery case is provided with a sealed portion (an outer edge sealed portion), which is formed at the outer edge of a receiving part, in which the electrode assembly is mounted, by thermal welding in order to seal the battery case, wherein electrode terminals are located at an upper sealed portion, a lower sealed portion, or the upper sealed portion and the lower sealed portion, two or more sealed lines are formed in at least one of side sealed portions, which are adjacent to the upper sealed portion or the lower sealed portion, such that the sealed lines are spaced apart from each other and parallel to each other, the sealed lines are continuously formed from the outer edge end of the upper sealed portion to the outer edge end of the lower sealed portion in the longitudinal direction of the battery case, and t
    Type: Application
    Filed: January 29, 2015
    Publication date: January 12, 2017
    Applicant: LG CHEM, LTD.
    Inventors: Jung Woo YOO, In Sung UHM, Je Young KIM
  • Publication number: 20160197342
    Abstract: Provided is an active material for negative electrode including porous silicon-based particles and carbon particles, wherein the carbon particles include fine carbon particles and coarse carbon particles respectively having different average particle diameters. Since an active material for negative electrode according to an embodiment of the present invention includes porous silicon-based particles as well as fine and coarse carbon particles respectively having different average particle diameters, the contact between the porous silicon-based particles and the carbon particles may be increased. As a result, lifetime characteristics of a lithium secondary battery may be further improved.
    Type: Application
    Filed: September 16, 2014
    Publication date: July 7, 2016
    Applicant: LG Chem, Ltd.
    Inventors: Mi Rim Lee, Hyun Chul Kim, Eun Kyung Kim, Yong Ju Lee, Jung Woo Yoo
  • Publication number: 20160141565
    Abstract: Disclosed is a secondary battery to which an electrolyte can be additionally supplied. More particularly, provided is a secondary battery including an electrode assembly that includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, and a porous elastic body that can contain an electrolyte, which are installed in a battery case.
    Type: Application
    Filed: June 3, 2014
    Publication date: May 19, 2016
    Applicant: LG Chem, Ltd.
    Inventors: In Sung Uhm, Ji Yoon Kwon, Jung Woo Yoo, Je Young Kim, Hoe Jin Hah, Kyoung Ho Kim, Il Hong Kim
  • Publication number: 20160028084
    Abstract: Provided are a porous silicon-based anode active material including porous SiOx particles (0?x<2) having surfaces coated with an oxide layer, a method of preparing the same, and a lithium secondary battery including the porous silicon-based anode active material. Since the anode active material includes an oxide layer formed on the porous SiOx particles (0?x<2), a reactivity between the anode active material and an electrolyte solution may be reduced and, as a result, an electrical short circuit in an electrode may be minimized. Also, since a plurality of pores is included in surfaces or the surfaces and inside of the SiOx particles, a thickness change rate of the electrode generated during charge and discharge of a secondary battery may be reduced and lifetime characteristics may be improved.
    Type: Application
    Filed: December 2, 2014
    Publication date: January 28, 2016
    Applicants: LG Chem, Ltd., Sejin Innotech. Co., Ltd.
    Inventors: Mi Rim Lee, Jung Woo Yoo, Eun Kyung Kim, Yong Ju Lee, Han Ho Lee, Ji Hyun Yoon, Byoung Man Bang, Chang Rae Lee, Il Kyo Jeong, Mi Kyeong Lee
  • Publication number: 20150380733
    Abstract: Provided are a porous silicon-based anode active material including a core part including silicon (Si) and MxSiy, and a shell part including Si and a plurality of pores on the core part, wherein, in the MxSiy, M is at least one element selected from the group consisting of Group 2A, 3A, and 4A elements and transition metals, 1?x?4, and 1?y?4, and a method of preparing the porous silicon-based anode active material. According to an embodiment of the present invention, capacity characteristics and lifetime characteristic of a lithium secondary battery may be improved by minimizing the volume expansion of an anode active material during charge and discharge.
    Type: Application
    Filed: October 29, 2014
    Publication date: December 31, 2015
    Applicant: LG Chem, Ltd.
    Inventors: Yong Ju Lee, Jun Sik Ham, Sung Man Lee, Rae Hwan Jo, Eun Kyung Kim, Je Young Kim, Hong Kyu Park, Jung Woo Yoo, Mi Rim Lee
  • Publication number: 20150072240
    Abstract: Provided are a porous silicon-based particle including a silicon (Si) or SiOx (0<x<2) particle, wherein the particle includes a plurality of nonlinear pores, and the nonlinear pores are formed as open pores in a surface of the particle, and a method of preparing the porous silicon-based particles. Porous silicon-based particles according to an embodiment of the present invention may be more easily dispersed in an anode active material slurry, may minimize side reactions with an electrolyte, and may reduce volume expansion during charge and discharge. Also, according to an embodiment of the present invention, the shape, form, and size of pores formed in the porous silicon-based particle may be controlled by adjusting the type of a metal catalyst, the concentration of the catalyst, and etching time.
    Type: Application
    Filed: November 14, 2014
    Publication date: March 12, 2015
    Applicants: LG CHEM, LTD., SEJIN INNOTECH. CO., LTD.
    Inventors: Jung Woo Yoo, Mi Rim Lee, Yong Ju Lee, Eun Kyung Kim, Han Ho Lee, Ji Hyun Yoon, Byoung Man Bang, Chang Rae Lee, Il Kyo Jeong, Mi Kyeong Lee
  • Publication number: 20140377643
    Abstract: Provided are a porous silicon-based anode active material including crystalline silicon (Si) particles, and a plurality of pores on surfaces, or the surfaces and inside of the crystalline silicon particles, wherein at least one plane of crystal planes of at least a portion of the plurality of pores includes a (100) plane, and a method of preparing the porous silicon-based anode active material. Since a porous silicon-based anode active material of the present invention may allow volume expansion, which is occurred during charge and discharge of a lithium secondary battery, to be concentrated on pores instead of the outside of the anode active material, the porous silicon-based anode active material may improve life characteristics of the lithium secondary battery by efficiently controlling the volume expansion.
    Type: Application
    Filed: September 11, 2014
    Publication date: December 25, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Yong Ju Lee, Mi Rim Lee, Jung Woo Yoo, Je Young Kim
  • Publication number: 20140322601
    Abstract: The anode active material of the present invention comprises silicon-based particles obtained from at least one of silicon, a silicon oxide and a silicon alloy, and the silicon-based particles have a faceted shape, thereby providing high capacity and good life characteristics without causing any deterioration which has been generated in the use of conventional silicon-based particles, and eventually providing a lithium secondary battery having such characteristics.
    Type: Application
    Filed: July 9, 2014
    Publication date: October 30, 2014
    Inventors: Yong-Ju Lee, Yoon-Ah Kang, Je-Young Kim, Seung-Youn Choi, Mi-Rim Lee, Hye-Ran Jung, Jung-Woo Yoo
  • Publication number: 20140154564
    Abstract: Provided are an anode active material including carbon-based particles, silicon nanowires grown on the carbon-based particles, and a carbon coating layer on surfaces of the carbon-based particles and the silicon nanowires, and a method of preparing the anode active material. Since the anode active material of the present invention is used in a lithium secondary battery, physical bonding force between the carbon-based particles and the silicon nanowires may not only be increased but conductivity may also be improved. Thus, lifetime characteristics of the battery may be improved.
    Type: Application
    Filed: January 30, 2014
    Publication date: June 5, 2014
    Applicant: LG Chem, Ltd.
    Inventors: Jung Woo Yoo, Won Jong Kwon, Eui Yong Hwang, Kil Sun Lee, Je Young Kim, Yong Ju Lee
  • Publication number: 20140154578
    Abstract: Provided are an anode active material including a porous silicon oxide-carbon material composite which includes a porous silicon oxide including pores and a line-type carbon material coated on a surface, in the pores, or on the surface and in the pores of the porous silicon oxide, and a method of preparing the anode active material. Since the silicon oxide of the anode active material according to an embodiment of the present invention may include the plurality of pores, resistance to the mechanical stress due to a volume change may be improved. Also, since the line-type carbon material is bonded to the inside of the pores, conductivity may not be decreased even in the case in which internal cracks occur in the porous silicon oxide and lifetime characteristics may be improved.
    Type: Application
    Filed: January 30, 2014
    Publication date: June 5, 2014
    Applicant: LG Chem, Ltd.
    Inventors: Jung Woo Yoo, Je Young Kim, Yong Ju Lee, Seung Youn Choi, Yoon Ah Kang, Mi Rim Lee, Hye Ran Jung
  • Publication number: 20140141334
    Abstract: Provided are a porous composite expressed by Chemical Formula 1 and having a porosity of 5% to 90%, and a method of preparing the same: MOx??<Chemical Formula 1> where M and x are the same as described in the specification. According to the present invention, since a molar ratio (x) of oxygen to a molar ratio of (semi) metal in the porous composite is controlled, an initial efficiency of a secondary battery may be increased. Also, since the porous composite satisfies the above porosity, a thickness change rate of an electrode generated during charge and discharge of the secondary battery may be decreased and lifetime characteristics may be improved.
    Type: Application
    Filed: January 27, 2014
    Publication date: May 22, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Jung Woo Yoo, Yong Ju Lee, Yoon Ah Kang, Mi Rim Lee, Je Young Kim
  • Publication number: 20140030599
    Abstract: Disclosed herein is an electrode active material for a secondary battery, and more particularly to an electrode active material comprising a porous silicon oxide-based composite and the method for preparing a porous silicon oxide-based composite.
    Type: Application
    Filed: August 3, 2012
    Publication date: January 30, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Yong Ju Lee, Yoon Ah Kang, Mi Rim Lee, Jung Woo Yoo, Je Young Kim