Patent ID: 9005815
Filing Date: 2015-04-14
Classification: H01M,Y02E,Y02P

Abstract:
1. 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.