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