- Manufacturing method of graphite for Lithium ion battery anode with improved stability by introduction of semi-covalent C-F functional group

摘要

The present invention relates to a method for producing graphite for a lithium ion battery negative electrode material having improved stability by introducing a semi-covalent carbon-fluorine functional group. More specifically, it relates to a method of manufacturing graphite for a negative electrode material for a lithium ion battery capable of introducing a semi-covalent carbon-fluorine functional group by irradiating the graphite with an electron beam to increase the active site on the surface and then reacting with a low concentration of fluorine gas. In addition, the present invention provides a method for producing graphite for a negative electrode material for a lithium ion battery, which increases the content of semi-covalent carbon-fluorine functional groups to mainly form a lithium fluoride film after initial charging to improve cycle stability of a lithium secondary battery. will be.