Abstract: The present invention provides: a method for preparing a petcoke-based artificial graphite negative electrode material for a lithium secondary battery, in which low-grade petcoke is used as a raw material, and artificial graphite having a high degree of graphitization is prepared through leaching and acid treatment of pulverized/classified low-grade petcoke in an acidic solution, followed by carbonization and graphitization; an artificial graphite negative electrode material for a lithium secondary battery, prepared thereby; and a lithium secondary battery.

Abstract: Disclosed is a substrate treating apparatus including a treatment solution dispenser supplying a treatment solution on a substrate, a transporting unit transporting the substrate, and a controller controlling the transporting unit so that the substrate is transported in an inclined position. The substrate is inclined sideways through a rotation with respect to an axis extending parallel to a transportation direction of the substrate. The rotation may be made in both directions in an alternating manner. The apparatus is useful for treating the substrate uniformly regardless of substrate size.