Patents by Inventor Chae-Woong Cho

Chae-Woong Cho 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: 10916778
    Abstract: Disclosed is a secondary battery which can improve safety by forming a carbon coating layer and an electrode active material layer on an electrode plate such that ends of the carbon coating layer and the electrode active material layer are in different positions.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: February 9, 2021
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Young San Ko, Min Jae Kim, Ki Jun Kim, Chae Woong Cho, Jun Sik Lee
  • Patent number: 10439210
    Abstract: In an aspect, a positive active material composition for a rechargeable lithium battery including a positive active material coated with a vanadium pentaoxide (V2O5) and an aqueous binder, a positive electrode including the same, and a rechargeable lithium battery including the positive electrode is disclosed.
    Type: Grant
    Filed: May 19, 2016
    Date of Patent: October 8, 2019
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Seung-Hun Han, Myung-Duk Lim, Chae-Woong Cho
  • Patent number: 10439222
    Abstract: A positive electrode composition for a rechargeable lithium battery includes a positive active material, a binder, and an aqueous solvent, wherein the binder includes carboxylmethyl cellulose having an average polymerization degree of about 700 to about 1200, and a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: October 8, 2019
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Seung-Hun Han, Myung-Duk Lim, Chae-Woong Cho
  • Publication number: 20190237767
    Abstract: Disclosed is a secondary battery which can improve safety by forming a carbon coating layer and an electrode active material layer on an electrode plate such that ends of the carbon coating layer and the electrode active material layer are in different positions.
    Type: Application
    Filed: July 17, 2017
    Publication date: August 1, 2019
    Inventors: Young San KO, Min Jae KIM, Ki Jun KIM, Chae Woong CHO, Jun Sik LEE
  • Patent number: 10230113
    Abstract: A cathode and method of preparing the cathode are disclosed. The cathode includes a current collector, and a cathode active material layer disposed on the current collector, wherein the current collector includes a metal substrate, and a conductive protective layer disposed on at least a portion of the metal substrate, and the conductive protective layer includes one or more of a protrusion and a recess which react with base, a lithium battery including the cathode, and a method of preparing the cathode.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: March 12, 2019
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Chae-Woong Cho, Myung-Duk Lim, Seung-Hun Han
  • Patent number: 9548491
    Abstract: Disclosed are a positive active material for a rechargeable lithium battery including a core including a lithium nickel-based oxide, a lithium iron phosphate-based compound, or a combination thereof; and carbon nanotube grown on the surface of the core, and a rechargeable lithium battery including the same.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: January 17, 2017
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Chae-Woong Cho, Seung-Hun Han
  • Patent number: 9455441
    Abstract: In an aspect, a positive active material composition for a rechargeable lithium battery including a positive active material coated with a vanadium pentaoxide (V2O5) and an aqueous binder, a positive electrode including the same, and a rechargeable lithium battery including the positive electrode is disclosed.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: September 27, 2016
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Seung-Hun Han, Myung-Duk Lim, Chae-Woong Cho
  • Publication number: 20160260969
    Abstract: In an aspect, a positive active material composition for a rechargeable lithium battery including a positive active material coated with a vanadium pentaoxide (V2O5) and an aqueous binder, a positive electrode including the same, and a rechargeable lithium battery including the positive electrode is disclosed.
    Type: Application
    Filed: May 19, 2016
    Publication date: September 8, 2016
    Inventors: Seung-Hun Han, Myung-Duk Lim, Chae-Woong Cho
  • Patent number: 9413009
    Abstract: Disclosed are a binder composition for a rechargeable lithium battery including a cross-linked compound of polyacrylic acid substituted with an alkali cation and polyvinyl alcohol and an electrode and rechargeable lithium battery including the same. The cross-linked compound of polyacrylic acid and polyvinyl alcohol is obtained by heating polyacrylic acid and polyvinyl alcohol to effect a cross-linking reaction via esterification. The cross-linked compound of polyvinyl alcohol and polyacrylic acid substituted with an alkali cation may improve phase stability of a binder, and has high cross-linking ratio, thereby providing for excellent performance of a rechargeable lithium battery.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: August 9, 2016
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Dong-Ho Son, Ki-Jun Kim, Ihn Kim, Chae-Woong Cho, Myoung-Sun Kim
  • Publication number: 20160172679
    Abstract: A positive electrode composition for a rechargeable lithium battery includes a positive active material, a binder, and an aqueous solvent, wherein the binder includes carboxylmethyl cellulose having an average polymerization degree of about 700 to about 1200, and a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided.
    Type: Application
    Filed: December 10, 2015
    Publication date: June 16, 2016
    Inventors: Seung-Hun HAN, Myung-Duk LIM, Chae-Woong CHO
  • Patent number: 9293761
    Abstract: Disclosed are a positive active material layer composition for a rechargeable lithium battery including a positive active material including a lithium metal oxide and tungsten oxide (WO3) coated on the surface of the lithium metal oxide and an aqueous binder, and a rechargeable lithium battery using the same.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: March 22, 2016
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Chae-Woong Cho, Myung-Duk Lim, Seung-Hun Han
  • Patent number: 9287563
    Abstract: An electrode for a lithium secondary battery includes an electrode active material, a conductive agent, and a polyurethane-based compound, and has pores having an average diameter of about 2 to about 20 nm. A lithium secondary battery includes the electrode.
    Type: Grant
    Filed: September 24, 2011
    Date of Patent: March 15, 2016
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Chae-Woong Cho, Woon-Suk Jang, Bum-Jin Chang, Ki-Jun Kim, Kwi-Seok Choi, Maeng-Eun Lee
  • Patent number: 9203076
    Abstract: An electrode for a lithium secondary battery, the electrode including: an electrode active material; and a composite including a clay and a polymer intercalated between layers of the clay, a method of manufacturing the electrode, and a lithium secondary battery including the electrode.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: December 1, 2015
    Assignee: SAMSUNG SDI CO., LTD.
    Inventors: Bum-Jin Chang, Woon-Suk Jang, Chae-Woong Cho, Seung-Hun Han, Ki-Jun Kim, Kwi-Seok Choi
  • Publication number: 20150228972
    Abstract: Disclosed are a positive active material for a rechargeable lithium battery including a core including a lithium nickel-based oxide, a lithium iron phosphate-based compound, or a combination thereof; and carbon nanotube grown on the surface of the core, and a rechargeable lithium battery including the same.
    Type: Application
    Filed: January 15, 2015
    Publication date: August 13, 2015
    Inventors: Chae-Woong Cho, Seung-Hun Han
  • Publication number: 20150214552
    Abstract: A cathode and method of preparing the cathode are disclosed. The cathode includes a current collector, and a cathode active material layer disposed on the current collector, wherein the current collector includes a metal substrate, and a conductive protective layer disposed on at least a portion of the metal substrate, and the conductive protective layer includes one or more of a protrusion and a recess which react with base, a lithium battery including the cathode, and a method of preparing the cathode.
    Type: Application
    Filed: November 6, 2014
    Publication date: July 30, 2015
    Inventors: Chae-Woong Cho, Myung-Duk Lim, Seung-Hun Han
  • Patent number: 9023532
    Abstract: A positive active material composition for a rechargeable lithium battery that includes a positive active composite material including a compound being reversibly capable of intercalating and deintercalating lithium, WO3, and a binder; and an aqueous binder, a positive electrode for a rechargeable lithium battery including the positive active material composition, and a rechargeable lithium battery comprising the positive electrode including the positive active material composition.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: May 5, 2015
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Chae-Woong Cho, Myung-Duk Lim, Seung-Hun Han
  • Patent number: 8945433
    Abstract: A conductive agent having a nonzero surface charge, a positive electrode slurry composition of a lithium secondary battery, including the conductive agent, and a lithium secondary battery including the conductive agent.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: February 3, 2015
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Chae-Woong Cho, Woon-Suk Jang, Bum-Jin Chang, Ki-Jun Kim, Kwi-Seok Choi
  • Patent number: 8877379
    Abstract: Disclosed is a positive active material for a rechargeable lithium battery and a rechargeable lithium battery including the same, and the positive active material includes a carbon material having a structure with ā€œnā€ polycyclic nano sheets, wherein ā€œnā€ is an integer of 1 to 30 with hexagonal rings having six carbon atoms condensed and substantially aligned in a plane, the polycyclic nano sheets are laminated in a vertical direction to the plane; and a lithium-containing olivine-based compound attached to the surface of the carbon material is formed with a carbon-coating layer on its surface.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: November 4, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Woon-Suk Jang, Chae-Woong Cho, Bum-Jin Chang, Ki-Jun Kim, Kwi-Seok Choi
  • Publication number: 20140255771
    Abstract: Disclosed are a positive active material composition for a rechargeable lithium battery, a positive electrode for a rechargeable lithium battery including the same, and a rechargeable lithium battery including the positive electrode. The positive active material composition for a rechargeable lithium battery includes a nickel-based positive active material having pH of greater than or equal to about 11; V2O5; an aqueous binder, and a conductive material.
    Type: Application
    Filed: June 28, 2013
    Publication date: September 11, 2014
    Inventors: Seung-Hun Han, Myung-Duk Lim, Chae-Woong Cho
  • Publication number: 20140193708
    Abstract: In an aspect, a positive active material composition for a rechargeable lithium battery including a positive active material coated with a vanadium pentaoxide (V2O5) and an aqueous binder, a positive electrode including the same, and a rechargeable lithium battery including the positive electrode is disclosed.
    Type: Application
    Filed: May 6, 2013
    Publication date: July 10, 2014
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Seung-Hun Han, Myung-Duk Lim, Chae-Woong Cho