Patents by Inventor Seung-Deok SEO

Seung-Deok SEO 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: 20240413389
    Abstract: The present invention can provide a method for preparing a sulfide-based solid electrolyte in a short time using a solvothermal synthesis method. In addition, the present invention may provide a sulfide-based solid electrolyte prepared by the method. In addition, the present invention may provide an electrode for an all-solid-state battery including the sulfide-based solid electrolyte.
    Type: Application
    Filed: June 13, 2024
    Publication date: December 12, 2024
    Applicant: Korea University Research and Business Foundation
    Inventors: Dong-Wan KIM, Seung-Deok SEO, Suk-Ho HWANG
  • Publication number: 20240413300
    Abstract: An anode active material for a secondary battery includes an anode current collector, and an anode active material layer on at least one surface of the anode current collector. The anode active material layer includes an anode active material and an anode binder. The anode active material includes a composite particle that includes a silicon-based active material particle and a solid electrolyte interphase (SEI) layer formed on at least a portion of a surface of the silicon-based active material particle. An F-density defined by Equation 1 is 23% or less.
    Type: Application
    Filed: August 19, 2024
    Publication date: December 12, 2024
    Inventors: Kwang Ho JEONG, Seung Deok SEO, Ji Sun LEE
  • Publication number: 20240387801
    Abstract: An anode active material composition for a lithium secondary battery includes a carbon-based anode active material and a silicon-based anode active material, wherein the carbon-based anode active material has an orientation (I004/I110, here, I004 is a peak intensity of the (004) plane when measuring X-ray diffraction (XRD) of the carbon-based anode active material, and I110 is a peak intensity of the (110) plane when measuring XRD of the carbon-based anode active material) of 2.85 or less measured by XRD.
    Type: Application
    Filed: May 16, 2024
    Publication date: November 21, 2024
    Inventors: Yong Seok LEE, Sung Do KIM, Jae Ram KIM, Jeong A KIM, So Hyun PARK, Sang Won BAE, Seung Deok SEO, Ki Joo EOM, Jong Hyuk LEE, Hyun Joong JANG
  • Publication number: 20240313195
    Abstract: Provided is an anode for a lithium secondary battery and a lithium secondary battery including the same, the anode for a secondary battery including: an anode current collector; a first anode mixture layer disposed on at least one surface of the anode current collector, and including a first silicon-based anode active material; and a second anode mixture layer disposed on the first anode mixture layer, and including a second silicon-based anode active material, wherein the second silicon-based anode active material has a higher discharge capacity than the first silicon-based anode active material.
    Type: Application
    Filed: January 5, 2024
    Publication date: September 19, 2024
    Inventors: Kwang Ho JEONG, Seung Deok SEO
  • Publication number: 20240297299
    Abstract: An anode for a lithium secondary battery includes an anode current collector, a second anode active material layer disposed on the anode current collector and including a second anode active material that includes a graphite-based active material and composite particles, and a first anode active material layer disposed between the anode current collector and the second anode active material layer and including a first anode active material that includes a graphite-based active material and does not include the composite particles. Each of the composite particles includes a carbon-based particle including pores, a silicon-containing coating layer disposed on an inside of the pores of the carbon-based particle or on a surface of the carbon-based particle, and a surface oxide layer disposed on the silicon-containing coating layer and including a silicon oxide.
    Type: Application
    Filed: February 28, 2024
    Publication date: September 5, 2024
    Inventors: Yong Seok LEE, Sung Do KIM, Jeong A KIM, Joon Hyung MOON, Seung Deok SEO, Young Mo YANG, Kwang Ho JEONG, Ju Ho CHUNG
  • Publication number: 20240213446
    Abstract: An anode active material for a secondary battery includes an anode current collector, and an anode active material layer on at least one surface of the anode current collector. The anode active material layer includes an anode active material and an anode binder. The anode active material includes a composite particle that includes a silicon-based active material particle and a solid electrolyte interphase (SEI) layer formed on at least a portion of a surface of the silicon-based active material particle. An F-density defined by Equation 1 is 23% or less.
    Type: Application
    Filed: December 5, 2023
    Publication date: June 27, 2024
    Inventors: Kwang Ho JEONG, Seung Deok SEO, Ji Sun LEE
  • Publication number: 20240213444
    Abstract: An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer formed on at least one surface of the anode current collector. The anode active material layer includes an anode active material and an anode binder. The anode active material includes a plurality of composite particles, each of the composite particles include a silicon-based active material particle, and a solid electrolyte interphase (SEI) layer formed on at least a portion of a surface of the silicon-based active material particle. A relative standard deviation of thickness values of the SEI layer of the composite particles, which are measured by an X-ray photoelectron spectroscopy (XPS) from 9 different composite particles among the plurality of composite particles after repeating 100 cycles of charging and discharging is 20% or less.
    Type: Application
    Filed: September 12, 2023
    Publication date: June 27, 2024
    Inventors: Kwang Ho JEONG, Seung Deok SEO, Jae Young CHOI, Sung Do KIM, Jeong A KIM, Do Ae YU, Yong Seok LEE
  • Publication number: 20240136527
    Abstract: Provided is a binder for a secondary battery including a copolymer including repeating units of the Chemical Formula 1, Chemical Formula 2, Chemical Formula 3, and Chemical Formula 4 disclosed herein. When the binder for a secondary battery is applied to a negative electrode and a secondary battery, expansion of the negative electrode may be effectively suppressed. Furthermore, the binder for a secondary battery has improved adhesion to effectively suppress exfoliation and desorption of a negative electrode, thereby manufacturing a secondary battery having significantly improved charge/discharge cycle characteristics and battery performance by using the binder.
    Type: Application
    Filed: October 10, 2023
    Publication date: April 25, 2024
    Inventors: Jun Soo Son, Min Kyung Seon, Dong Gun Lee, Kwang Ho Jung, Seung Deok Seo
  • Patent number: 11342552
    Abstract: Provide are a method of manufacturing a cathode material including (A) synthesizing a precursor including a metal compound and a carbon compound, (B) carbonizing the precursor in an inert atmosphere to produce a metal-carbon composite, (C) sulfurizing the metal-carbon composite in a sulfur atmosphere to produce a metal-metal sulfide-carbon composite, (D) removing metal particles from the metal-metal sulfide-carbon composite to produce a metal sulfide-carbon composite, and (E) synthesizing sulfur particles in the metal sulfide-carbon composite to produce a metal sulfide-sulfur-carbon composite, and a cathode active material.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: May 24, 2022
    Assignee: Korea University Research and Business Foundation
    Inventors: Dong-Wan Kim, Seung-Deok Seo
  • Publication number: 20210043923
    Abstract: Provide are a method of manufacturing a cathode material including (A) synthesizing a precursor including a metal compound and a carbon compound, (B) carbonizing the precursor in an inert atmosphere to produce a metal-carbon composite, (C) sulfurizing the metal-carbon composite in a sulfur atmosphere to produce a metal-metal sulfide-carbon composite, (D) removing metal particles from the metal-metal sulfide-carbon composite to produce a metal sulfide-carbon composite, and (E) synthesizing sulfur particles in the metal sulfide-carbon composite to produce a metal sulfide-sulfur-carbon composite, and a cathode active material.
    Type: Application
    Filed: June 30, 2020
    Publication date: February 11, 2021
    Applicant: Korea University Research and Business Foundation
    Inventors: Dong-Wan KIM, Seung-Deok SEO