Abstract: Disclosed is a negative active material for a lithium secondary battery. The negative active material includes graphitized coke having a graphitization catalyst element and non-flat artificial graphite. The negative active material for a lithium secondary battery has good electrolyte-immersibility due to the gap between the graphite particles from graphitized coke having a graphitization catalyst element, and non-flat artificial graphite. Therefore, the present invention may provide a lithium secondary battery which has good high-rate capacity and initial efficiency.

Abstract: A negative electrode active material for a lithium-based secondary battery includes a graphite-like carbon material having an intensity ratio I(110)/I(002) of an X-ray diffraction peak intensity I(002) at a (002) plane to an X-ray diffraction peak intensity I(110) at a (110) plane of less than 0.2.

Abstract: A negative active material for a rechargeable lithium battery which exhibits good discharge capacity and charge and discharge efficiency, and enables the use of all types of electrolytes. The active material includes a crystalline carbon core and a semi-crystalline carbon shell. The semi-crystalline carbon shell includes at least one element or a compound of at least two different types of elements, and has a turbostratic or half onion-sheath. The compound includes only element. The element serves graphitization catalyst and causes a change in a structure of surrounding carbon. In particular, the negative active material includes metal boride.

Abstract: A negative active material for a lithium secondary battery includes a crystalline graphite core and a carbon shell. The carbon shell includes at least one material selected from a transition metal, an alkali metal, an alkaline earth metal, an element of Group 3B of the Periodic table, an element of Group 4B, an element of Group 5B or a mixture thereof. The carbon shell is a turbostratic carbon layer, or am amorphous or crystalline carbon layer having different physical properties from the core. The negative active material can be used in a lithium secondary battery such that the battery has a large discharge capacity and a high charge/discharge efficiency.

Abstract: A negative active material for a rechargeable lithium battery which exhibits good high-rate charge characteristics and cycle life characteristics. The active material includes a crystalline carbon core and a semi-crystalline carbon shell. The semi-crystalline carbon shell includes at least one element or a compound of at least two different types of elements and carbides thereof, and has a turbostratic or half onion-sheath. The compound includes only element. The element serves a graphitization catalyst and causes a change in a structure of surrounding carbon. In particular, the negative active material includes metal boride and metal carbide.

Abstract: The present invention relates to a negative active material for a rechargeable lithium battery and a method of preparing the same, said negative active material comprising crystalline carbon having a dispersed element serving as graphitization catalyst therein. Said negative active material for a rechargeable lithium battery is prepared by the steps of adding an element serving as a graphitization catalyst to a carbon precursor; coking the mixture by heat-treating at 300 to 600° C. carbonizing the cokes; and graphitizing the carbide at 2800 to 3000° C.

Abstract: Disclosed is carbonaceous active material for a lithium-ion secondary battery. Conducting a differential thermal analysis on the carbonaceous active material results in the displaying of at least two exothermic peaks overlapping to form shoulders.

Abstract: Disclosed is a negative active material for a lithium secondary battery. The negative active material includes graphitized coke having a graphitization catalyst element and non-flat artificial graphite. The negative active material for a lithium secondary battery has good electrolyte-immersibility due to the gap between the graphite particles from graphitized coke having a graphitization catalyst element, and non-flat artificial graphite. Therefore, the present invention may provide a lithium secondary battery which has good high-rate capacity and initial efficiency.

Abstract: A negative electrode active material for a lithium-based secondary battery includes a graphite-like carbon material having an intensity ratio I(110)/I(002) of an X-ray diffraction peak intensity I(002) at a (002) plane to an X-ray diffraction peak intensity I(110) at a (110) plane of less than 0.2.