Patents by Inventor Heeseon Choi

Heeseon Choi 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).

  • Composite anode active material, lithium battery including the same, and method of preparing the composite anode active material
    Patent number: 10388951
    Abstract: A composite anode active material includes: a core portion including a crystalline carbonaceous material; a shell portion including a plurality of composite particles deposited on at least a portion of the core portion, wherein each of the composite particles includes a metallic core that is alloyable with lithium; and a coating layer including metal nitride on the surface of the metallic core in an island pattern. A lithium battery including the composite anode active material and a method of preparing the composite anode active material are also provided.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: August 20, 2019
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jiyeon Kwak, Youngugk Kim, Heeseon Choi, Yeongap Kim
  • Negative active material, lithium battery including the negative active material, and method of preparing the negative active material
    Patent number: 10305097
    Abstract: Negative active materials, lithium batteries including the negative active materials, and methods of preparing the negative active materials. The negative active material includes a complex including: a silicon-based core; particles of metal nitride randomly disposed on the silicon-based core, and nanostructures disposed on at least one of the silicon-based core or the metal nitride. The negative active material may improve the electrical conductivity of a negative electrode. Accordingly, a lithium battery including the negative electrode may have improved lifetime characteristics.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: May 28, 2019
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Yeongap Kim, Youngugk Kim, Heeseon Choi, Jiyeon Kwak
  • ANODE AND LITHIUM BATTERY INCLUDING THE SAME
    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
  • NEGATIVE ACTIVE MATERIAL, LITHIUM BATTERY INCLUDING THE SAME, AND METHOD OF PREPARING THE NEGATIVE ACTIVE MATERIAL
    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
  • COMPOSITE ANODE ACTIVE MATERIAL, LITHIUM BATTERY INCLUDING THE SAME, AND METHOD OF PREPARING THE COMPOSITE ANODE ACTIVE MATERIAL
    Publication number: 20170084909
    Abstract: A composite anode active material includes: a core portion including a crystalline carbonaceous material; a shell portion including a plurality of composite particles deposited on at least a portion of the core portion, wherein each of the composite particles includes a metallic core that is alloyable with lithium; and a coating layer including metal nitride on the surface of the metallic core in an island pattern. A lithium battery including the composite anode active material and a method of preparing the composite anode active material are also provided.
    Type: Application
    Filed: September 12, 2016
    Publication date: March 23, 2017
    Inventors: Jiyeon Kwak, Youngugk Kim, Heeseon Choi, Yeongap Kim
  • NEGATIVE ACTIVE MATERIAL, LITHIUM BATTERY INCLUDING THE NEGATIVE ACTIVE MATERIAL, AND METHOD OF PREPARING THE NEGATIVE ACTIVE MATERIAL
    Publication number: 20170005329
    Abstract: Negative active materials, lithium batteries including the negative active materials, and methods of preparing the negative active materials. The negative active material includes a complex including: a silicon-based core; particles of metal nitride randomly disposed on the silicon-based core, and nanostructures disposed on at least one of the silicon-based core or the metal nitride. The negative active material may improve the electrical conductivity of a negative electrode. Accordingly, a lithium battery including the negative electrode may have improved lifetime characteristics.
    Type: Application
    Filed: June 20, 2016
    Publication date: January 5, 2017
    Inventors: Yeongap Kim, Youngugk Kim, Heeseon Choi, Jiyeon Kwak