METHOD FOR FABRICATING CARBON COATED SILICON POWDER AND LITHIUM SECONDARY BATTERY USING A CARBON COATED SILICON POWDER

摘要

The present invention applies a silicon material having a higher electrical capacity than graphite, which is a negative electrode active material of a conventional lithium secondary battery, and improves electrical contact as compared to a conventional silicon material, thereby significantly improving reversible capacity and lifetime characteristics. It provides a method for producing a coated silicon powder and a lithium secondary battery using the same. To this end, the present invention is to place the silicon powder in the center position of the tube furnace, forming the inside of the tube in an inert atmosphere, the step of flowing the reaction sample inside while heating the tube furnace at a high temperature, and heating at a high temperature Rotating the tube to the tube during the reaction in the state characterized in that the carbon powder is evenly applied to the silicon powder, in the negative electrode constituting the lithium secondary battery, the negative electrode is coated with carbon The silicon active material is characterized by comprising a carbon material as a conductive material and a polymer material as a binder.;Lithium Secondary Battery, Silicon Powder, Carbon, Anode