Patents by Inventor Dong Wook SEONG

Dong Wook SEONG 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).

  • Lithium secondary battery separator including adhesive layer
    Patent number: 11721873
    Abstract: A coating composition including a solvent, inorganic particles, a dispersant, and a binder, wherein the binder includes a binder B and a binder A, both the binder B and the binder A include a VDF unit and a HFP unit, binder B includes 8 to 50 wt % of the HFP-derived unit, and binder A includes 5 wt % or more of the HFP-derived unit under a condition that a proportion of the HFP-derived unit in the binder A is 80% or less of a proportion of the HFP-derived unit in the binder B, the binder B has a total number average molecular weight of 200,000 to 2,000,000 Da, and the binder A has a total number average molecular weight corresponding to 70% or less of that of the binder B, and a weight ratio of the binder A:the binder B in the coating composition is 0.1 to 10:1. The coating composition is suitable for use in coating at least one surface of a porous substrate having a plurality of pores.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: August 8, 2023
    Assignee: LG ENERGY SOLUTION, LTD.
    Inventors: So Mi Jeong, Dong Wook Seong, Dae Sung Jang
  • LITHIUM SECONDARY BATTERY SEPARATOR INCLUDING ADHESIVE LAYER
    Publication number: 20190245183
    Abstract: A coating composition including a solvent, inorganic particles, a dispersant, and a binder, wherein the binder includes a binder B and a binder A, both the binder B and the binder A include a VDF unit and a HFP unit, binder B includes 8 to 50 wt % of the HFP-derived unit, and binder A includes 5 wt % or more of the HFP-derived unit under a condition that a proportion of the HFP-derived unit in the binder A is 80% or less of a proportion of the HFP-derived unit in the binder B, the binder B has a total number average molecular weight of 200,000 to 2,000,000 Da, and the binder A has a total number average molecular weight corresponding to 70% or less of that of the binder B, and a weight ratio of the binder A:the binder B in the coating composition is 0.1 to 10:1. The coating composition is suitable for use in coating at least one surface of a porous substrate having a plurality of pores.
    Type: Application
    Filed: February 13, 2018
    Publication date: August 8, 2019
    Applicant: LG CHEM, LTD.
    Inventors: So Mi JEONG, Dong Wook SEONG, Dae Sung JANG