Patents by Inventor Inoh CHA

Inoh CHA 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: 11735741
    Abstract: A negative electrode for a lithium secondary battery comprises a current collector and a negative electrode active material layer formed on the current collector, wherein the negative electrode active material layer includes a first negative electrode active material and a first binder, and a second active material layer formed on the first active material layer and including a second negative electrode active material and a second binder, a content of the first binder is greater than that of the second binder, a loading level of the negative electrode active material layer is 10 mg/cm2 to 30 mg/cm2, a loading level of the first active material layer is 4 mg/cm2 to 25 mg/cm2, a loading level of the second active material layer is 4 mg/cm2 to 25 mg/cm2, and a loading level of the second active material layer is equal to or higher than that of the first active material layer.
    Type: Grant
    Filed: September 8, 2022
    Date of Patent: August 22, 2023
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Inoh Cha, Deok-Hyun Kim, Jinhee Lee
  • Patent number: 11728488
    Abstract: A negative electrode for a lithium secondary battery comprises a current collector and a negative electrode active material layer formed on the current collector, wherein the negative electrode active material layer includes a first negative electrode active material and a first binder, and a second active material layer formed on the first active material layer and including a second negative electrode active material and a second binder, a content of the first binder is greater than that of the second binder, a loading level of the negative electrode active material layer is 10 mg/cm2 to 30 mg/cm2, a loading level of the first active material layer is 4 mg/cm2 to 25 mg/cm2, a loading level of the second active material layer is 4 mg/cm2 to 25 mg/cm2, and a loading level of the second active material layer is equal to or higher than that of the first active material layer.
    Type: Grant
    Filed: September 8, 2022
    Date of Patent: August 15, 2023
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Inoh Cha, Deok-Hyun Kim, Jinhee Lee
  • Patent number: 11646422
    Abstract: The present invention relates to a negative electrode for a lithium secondary battery and a lithium secondary battery comprising the same.
    Type: Grant
    Filed: September 8, 2022
    Date of Patent: May 9, 2023
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Inoh Cha, Deok-Hyun Kim, Jinhee Lee
  • Publication number: 20230028390
    Abstract: A negative electrode for a lithium secondary battery comprises a current collector and a negative electrode active material layer formed on the current collector, wherein the negative electrode active material layer includes a first negative electrode active material and a first binder, and a second active material layer formed on the first active material layer and including a second negative electrode active material and a second binder, a content of the first binder is greater than that of the second binder, a loading level of the negative electrode active material layer is 10 mg/cm2 to 30 mg/cm2, a loading level of the first active material layer is 4 mg/cm2 to 25 mg/cm2, a loading level of the second active material layer is 4 mg/cm2 to 25 mg/cm2, and a loading level of the second active material layer is equal to or higher than that of the first active material layer.
    Type: Application
    Filed: September 8, 2022
    Publication date: January 26, 2023
    Inventors: Inoh CHA, Deok-Hyun KIM, Jinhee LEE
  • Publication number: 20230017229
    Abstract: A negative electrode for a lithium secondary battery comprises a current collector and a negative electrode active material layer formed on the current collector, wherein the negative electrode active material layer includes a first negative electrode active material and a first binder, and a second active material layer formed on the first active material layer and including a second negative electrode active material and a second binder, a content of the first binder is greater than that of the second binder, a loading level of the negative electrode active material layer is 10 mg/cm2 to 30 mg/cm2, a loading level of the first active material layer is 4 mg/cm2 to 25 mg/cm2, a loading level of the second active material layer is 4 mg/cm2 to 25 mg/cm2, and a loading level of the second active material layer is equal to or higher than that of the first active material layer.
    Type: Application
    Filed: September 8, 2022
    Publication date: January 19, 2023
    Inventors: Inoh CHA, Deok-Hyun KIM, Jinhee LEE
  • Publication number: 20230006212
    Abstract: The present invention relates to a negative electrode for a lithium secondary battery and a lithium secondary battery comprising the same.
    Type: Application
    Filed: September 8, 2022
    Publication date: January 5, 2023
    Inventors: Inoh CHA, Deok-Hyun KIM, Jinhee LEE
  • Patent number: 11515520
    Abstract: The present invention relates to a negative active material for a lithium secondary battery, a preparation method therefor, and a lithium secondary battery including the same. The negative electrode active material is a negative electrode material for a secondary battery, the negative electrode active material comprising a silicon-carbon composite comprising: a core comprising crystalline carbon and silicon particles; and an amorphous carbon-containing coating layer disposed on a surface of the core, wherein the negative electrode active material comprises: silicon oxide formed on a surface of the silicon particles; and an oxide of crystalline carbon, formed on a surface of the crystalline carbon, the average particle diameter (D50) of the silicon particles having a nanometer size, the proportion of O relative to Si in the silicon oxide is 30%-50%, and the proportion of O relative to C in the oxide of the crystalline carbon is 4%-10%.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: November 29, 2022
    Assignee: SAMSUNG SDI CO., LTD.
    Inventors: Sangeun Park, Jiyeon Kwak, Yeongap Kim, Youngugk Kim, Uisong Do, Yuntaek Oh, Yongchan You, Changui Jeong, Inoh Cha, Hee Seon Choi
  • Patent number: 11444283
    Abstract: The present invention relates to a negative electrode for a lithium secondary battery and a lithium secondary battery comprising the same.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: September 13, 2022
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Inoh Cha, Deok-Hyun Kim, Jinhee Lee
  • Patent number: 11088360
    Abstract: A negative electrode for a rechargeable lithium battery includes a current collector and a negative active material layer disposed on the current collector. The negative active material layer includes a conductive material including a linear-shaped carbon-based material having an average length of about 40 ?m to about 250 ?m and a dot-shaped carbon-based material, and a negative active material. A mixing ratio of the conductive material and the negative active material is a weight ratio of about 0.1:99.9 to about 2.0:98.0.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: August 10, 2021
    Assignee: SAMSUNG SDI CO., LTD.
    Inventors: Inoh Cha, Jinhee Lee, Chaewoong Cho
  • Publication number: 20200335795
    Abstract: The present invention relates to a negative electrode for a lithium secondary battery and a lithium secondary battery comprising the same.
    Type: Application
    Filed: August 27, 2018
    Publication date: October 22, 2020
    Inventors: Inoh CHA, Deok-Hyun KIM, Jinhee LEE
  • Publication number: 20200152970
    Abstract: The present invention relates to a negative active material for a lithium secondary battery, a preparation method therefor, and a lithium secondary battery including the same. The negative electrode active material is a negative electrode material for a secondary battery, the negative electrode active material comprising a silicon-carbon composite comprising: a core comprising crystalline carbon and silicon particles; and an amorphous carbon-containing coating layer disposed on a surface of the core, wherein the negative electrode active material comprises: silicon oxide formed on a surface of the silicon particles; and an oxide of crystalline carbon, formed on a surface of the crystalline carbon, the average particle diameter (D50) of the silicon particles having a nanometer size, the proportion of O relative to Si in the silicon oxide is 30%-50%, and the proportion of O relative to C in the oxide of the crystalline carbon is 4%-10%.
    Type: Application
    Filed: July 10, 2018
    Publication date: May 14, 2020
    Inventors: Sangeun PARK, Jiyeon KWAK, Yeongap KIM, Youngugk KIM, Uisong DO, Yuntaek OH, Yongchan YOU, Changui JEONG, Inoh CHA, Hee Seon CHOI
  • Publication number: 20190252673
    Abstract: A negative electrode for a rechargeable lithium battery includes a current collector and a negative active material layer disposed on the current collector. The negative active material layer includes a conductive material including a linear-shaped carbon-based material having an average length of about 40 ?m to about 250 ?m and a dot-shaped carbon-based material, and a negative active material. A mixing ratio of the conductive material and the negative active material is a weight ratio of about 0.1:99.9 to about 2.0:98.0.
    Type: Application
    Filed: January 4, 2019
    Publication date: August 15, 2019
    Inventors: Inoh CHA, Jinhee LEE, Chaewoong CHO
  • Publication number: 20190006679
    Abstract: An anode includes a composite anode active material including a core and a coating layer on the core, the core including a metal alloyable with lithium. The coating layer includes a first polymer having a first functional group and a binder including a second polymer having a second functional group. The first polymer and the second polymer are cross-linked with each other via ester bonding between the first functional group and the second functional group.
    Type: Application
    Filed: June 29, 2018
    Publication date: January 3, 2019
    Inventors: Changui JEONG, Jiyeon KWAK, Youngugk KIM, Uisong DO, Sangeun PARK, Yuntaek OH, Yongchan YOU, Inoh CHA, Heeseon CHOI
  • Publication number: 20180026262
    Abstract: A negative active material includes a silicon-based material core and a pitch coating layer on a surface of the silicon-based material core. The pitch coating layer includes a mesophase pitch.
    Type: Application
    Filed: June 13, 2017
    Publication date: January 25, 2018
    Inventors: Changui JEONG, Jiyeon KWAK, Yeongap KIM, Youngugk KIM, Uisong DO, Sangeun PARK, Yuntaek OH, Yongchan YOU, Inoh CHA, Heeseon CHOI