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US 9,005,815 B2Granted
Negative active material for rechargeable lithium battery, method of preparing same, and rechargeable lithium battery
AssigneeSamsung SDI Co., Ltd.
InventorsKyeu-Yoon Sheem, Bok-Hyun Ka, Da-Woon Han
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Abstract
A negative active material for a rechargeable lithium battery, a method of manufacturing the same, and a rechargeable lithium battery including the negative active material. The negative active material includes carbon particles having interplanar spacing (d002) ranging from about 0.34 nm to about 0.50 nm at a 002 plane, measured by X-ray diffraction using CuKα, and nitrogen on the surface of the carbon particles.
Claims4
A negative active material for a rechargeable lithium battery, comprising:
- carbon particles having interlayer spacing (d002) ranging from 0.34 nm to 0.35 nm at a 002 plane measured regarding X-ray diffraction using CuKα;
- and
- nitrogen on the surface of the carbon particles;
- wherein the surface includes the space from the surface of the carbon particles down to about a half radius from the center of the carbon particles;
- wherein the nitrogen concentration ranges from about 0.1 to about 5 wt % based on the weight of the negative active material;
- wherein the center of the carbon particles comprises no nitrogen;
- and
- wherein the carbon particles comprise amorphous carbon and the carbon particles have a single amorphous structure both on the surface and in the center region.
5 more elements
A rechargeable lithium battery comprising:
- a negative electrode comprising a negative active material having carbon particles with interlayer spacing (d002) ranging from 0.34 nm to 0.35 nm at a 002 plane, measured by X-ray diffraction using CuKα, and nitrogen on the surface of the carbon particles;
- a positive electrode comprising a positive active material;
- and
- a non-aqueous electrolyte;
- wherein the surface includes the space from the surface of the carbon particles down to about a half radius from the center of the carbon particles;
- wherein the nitrogen concentration ranges from about 0.1 to about 5 wt % based on the weight of the negative active material;
- wherein the center of the carbon particles comprises no nitrogen;
- and
- wherein the carbon particles have amorphous carbon and the carbon particles have a single amorphous structure both on the surface and in the center region.
6 more elements
Dependencies are inferred from the claim text.