Graphite-based anode material and preparation method therefor
AssigneePosco Future M Co., Ltd.
InventorsGa Eul LEE, Ji Kwon JUNG, Heon Young LEE, Kyoung Muk LEE, Hae Jun KWON, Jin Wook MIN
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Abstract
The present exemplary embodiments relate to a graphite-based negative electrode material, a method of manufacturing the same, a negative electrode including the same, and a lithium secondary battery including the same. The graphite-based negative electrode material according to an exemplary embodiment includes: a graphite oxide obtained by oxidizing a surface of first graphite, and a graphite coating including second graphite and low crystalline carbon positioned on a surface of the second graphite, wherein the graphite coating to the graphite oxide is 1/9 to 1/3.
Claims14
A graphite-based negative electrode material comprising:
- a graphite oxide obtained by oxidizing a surface of first graphite;
- and
- a graphite coating including second graphite and low crystalline carbon positioned on a surface of the second graphite,
- wherein the graphite coating to the graphite oxide is 1/9 to 1/3.
A negative electrode for a lithium secondary battery comprising 96 to 99 wt % of the graphite-based negative electrode material of claim 1, 0.5 to 1.5 wt % of a thickening agent, and a remaining amount of a binder.
A method of manufacturing a graphite-based negative electrode material, the method comprising:
- oxidizing a surface of first graphite to manufacture a graphite oxide;
- mixing second graphite and low crystalline carbon to manufacture a graphite coating;
- and
- mixing the graphite oxide and the graphite coating at 1/9 to 1/3 of the graphite coating to the graphite oxide.
Dependencies are inferred from the claim text.