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US 11,894,548 B2Granted
Negative electrode active material, method of preparing the negative electrode active material, negative electrode, and secondary battery including the negative electrode
AssigneeLG Energy Solution, Ltd.
InventorsHee Won Choi, Jae Wook Lee
Life of this patent
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Abstract
A negative electrode active material which includes a core including artificial graphite, and a carbon coating layer disposed on the surface of the core, wherein an edge plane of the negative electrode active material has a specific surface area of 1.0 m2/g to 1.9 m2/g, a negative electrode including the same, and a secondary battery including the negative electrode.
Claims13
A negative electrode active material comprising:
- a core comprising artificial graphite;
- and
- a carbon coating layer disposed on a surface of the core,
- wherein an edge plane of the negative electrode active material has a specific surface area of 1.0 m2/g to 1.9 m2/g.
1 more element
A method of preparing a negative electrode active material, the method comprising:
- preparing needle cokes;
- crushing the needle cokes at a pressure of 10 MPa to 20 MPa;
- mixing the crushed needle cokes with a carbonaceous precursor, and preparing a core by performing a heat treatment at a temperature of 3,000° C. or more;
- and
- forming a carbon coating layer on a surface of the core.
2 more elements
A negative electrode comprising:
- a current collector;
- and
- a negative electrode active material layer disposed on the current collector,
- wherein the negative electrode active material layer comprises a negative electrode active material,
- wherein the negative electrode active material comprises a core comprising artificial graphite;
- and a carbon coating layer disposed on a surface of the core,
- wherein an edge plane of the negative electrode has a specific surface area of 0.5 m2/g to 1.1 m2/g.
4 more elements
Dependencies are inferred from the claim text.