Anode material and electrochemical device and electronic device including the same
AssigneeNingde Amperex Technology Limited
InventorsChengBo Zhang, Ting Yi, Hang Cui, Yuansen Xie
Life of this patent
Estimating the term…
Abstract
An anode material includes a lithiated silicon oxide material and a MySiOz layer. The lithiated silicon oxide material includes Li2SiO3, Li2Si2O5 or a combination thereof, and the MySiOz layer coats the lithiated silicon oxide material; M includes Mg, Al, Zn, Ca, Ba, B or any combination thereof; and 0<y<3, and 0.5<z<6. The anode material has high first discharge coulombic efficiency, high gram capacity, and good cycle performance.
Claims18
An anode material, comprising:
- a lithiated silicon oxide material and a MySiOz layer,
- wherein the lithiated silicon oxide material includes Li2SiO3, Li2Si2O5 or a combination thereof, and the MySiOz layer is coated on the lithiated silicon oxide material;
- M comprises B;
- and
- 0<y<3, and 0.5<z<6;
- wherein a weight percentage of the M element is 10 wt % to 30 wt %, based on a total weight of the anode material.
A method for preparing an anode material, comprising:
- (1) mixing a M source with a silicon oxide SiOx to form a mixed material;
- carrying out a high-temperature treatment on the mixed material at 800-1300° C. for 1-5 h;
- grinding the material subjected to the high-temperature treatment to obtain a grinded material;
- and
- (2) mixing the grinded material with a Li source;
- carrying out high-temperature treatment at 500-800° C. for 1-5 h;
- wherein 0.5<x<2;
- and
- M comprises B.
An anode comprising an anode material, wherein the anode material comprises a lithiated silicon oxide material and a MySiOz layer, wherein
- the lithiated silicon oxide material includes Li2SiO3, Li2Si2O5 or a combination thereof, and the MySiOz layer is coated on the lithiated silicon oxide material;
- M comprises B;
- and 0<y<3, and 0.5<z<6;
- wherein a weight percentage of the M element is 10 wt % to 30 wt %, based on a total weight of the anode material.
Dependencies are inferred from the claim text.