Abstract: Disclosed is a method of manufacturing a composite anode material for a lithium secondary battery containing nano-sized silicon and a carbonaceous material through a single process, the method including mixing a carbonaceous material and solid silicon and performing carbothermal shock for rapidly heating the carbonaceous material so that the solid silicon is melted using the heated carbonaceous material and is dispersed and attached in the form of particles to the surface of the carbonaceous material, the size of the silicon particles, which grow on the surface of the carbonaceous material, being adjusted during the carbothermal shock. Accordingly, processing costs can be lower than conventional methods of manufacturing silicon nanoparticles, and manufacturing costs can be further reduced by simultaneously performing formation of the silicon nanoparticles and compounding with the carbonaceous material.
Type:
Grant
Filed:
November 18, 2019
Date of Patent:
June 21, 2022
Assignee:
HPK INC.
Inventors:
Chang Hyun Cho, Chang Se Woo, Kap Seung Yang, Chang Ha Lim, Chung Hyung Joh
Abstract: Provided is a method of producing a carbon fiber, the method including: a) adding an acrylonitrile-based polymer solution to a solution containing a glycol-based compound having a boiling point of 180 to 210° C. to precipitate an acrylonitrile-based polymer; b) melt spinning the acrylonitrile-based polymer to obtain a spun fiber; and c) performing stabilization and carbonization on the spun fiber to obtain a carbon fiber.
Type:
Grant
Filed:
April 10, 2020
Date of Patent:
March 8, 2022
Assignee:
HPK INC.
Inventors:
Chang Hyun Cho, Chang Se Woo, Kap Seung Yang, Chang Ha Lim, Sun Ho Choe, Hong Min Kim, Kyung Ae Oh, Eun Ji Kim
Abstract: Disclosed is a method of manufacturing a composite anode material for a lithium secondary battery containing nano-sized silicon and a carbonaceous material through a single process, the method including mixing a carbonaceous material and solid silicon and performing carbothermal shock for rapidly heating the carbonaceous material so that the solid silicon is melted using the heated carbonaceous material and is dispersed and attached in the form of particles to the surface of the carbonaceous material, the size of the silicon particles, which grow on the surface of the carbonaceous material, being adjusted during the carbothermal shock. Accordingly, processing costs can be lower than conventional methods of manufacturing silicon nanoparticles, and manufacturing costs can be further reduced by simultaneously performing formation of the silicon nanoparticles and compounding with the carbonaceous material.
Type:
Application
Filed:
November 18, 2019
Publication date:
October 8, 2020
Applicant:
HPK INC.
Inventors:
Chang Hyun CHO, Chang Se WOO, Kap Seung YANG, Chang Ha LIM, Chung Hyung JOH