NEGATIVE ACTIVE MATERIAL CONTAINING SUPER-CONDUCTIVE NANOPARTICLE COATED WITH HIGH CAPACITY NEGATIVE MATERIAL AND LITHIUM BATTERY COMPRISING SAME

摘要

PURPOSE: A negative electrode active material is provided to obtain a lithium secondary battery with excellent capacity and recharging efficiency while avoiding the direct damage to a battery even if the volume expansion occurs. CONSTITUTION: A negative electrode active material comprises nano metal particles and super conductive nanoparticles. The super conductive nanoparticles has the structure where n polycyclic nano-sheets are laminated along the direction vertical to one plane thereof, wherein n is an integer of 2-100. In the polycyclic nano-sheets, rings in which 6 carbon atoms is connected are condensed and are arranged on one plane. When a first carbon and a second carbon are selected from carbons of the n polycyclic nano-sheets in order to L1 >= L2 and the first carbon is positioned at a zero coordinate A(0, 0, 0) of a 3D coordinate system having an x-axis, y-axis and z-axis, the second carbon has the coordinate B(a, b, c) and c is 100 nm or less.