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US 12,009,515 B2Granted
Negative electrode active material for lithium secondary battery and preparation method thereof
AssigneeLG Energy Solution, Ltd.
InventorsYong Ju Lee, Rae Hwan Jo, Su Min Lee, Dong Hyuk Kim, Se Mi Park
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Abstract
A negative electrode active material for a lithium secondary battery, which includes a silicon-based particle represented by M-SiOx, wherein M is Li, Mg, Ca, Al, or Ti, and 0≤x<2, wherein the M-SiOx includes an amorphous phase at 20 wt % to 70 wt % based upon a total weight of the M-SiOx, thereby exhibiting excellent initial efficiency and lifespan characteristics, and a preparation method thereof.
Claims8
A negative electrode active material for a lithium secondary battery, comprising:
- a silicon-based particle represented by M-SiOx, wherein the M is Mg, and O≤x<2;
- and
- a carbon coating layer on a surface of the silicon-based particle;
- wherein the M-SiOx, comprises a crystalline phase and an amorphous phase,
- wherein the amorphous phase is present in an amount of 37 wt % to 52 wt % based upon a total weight of the M-SiOx,
- wherein the silicon-based particle comprises the M in an amount of 10 wt % to 20 wt % based on a total weight of the M SiOx, and
- wherein the carbon coating layer is included in an amount of 4 wt % to 5 wt % based on a total weight of the negative electrode active material.
4 more elements
Dependencies are inferred from the claim text.