Abstract: A lithium secondary battery is provided. Electrolytes of the lithium secondary battery are divided between an anode and a cathode into a plurality of regions not to contact with each other, thereby limiting movement paths of lithium ions. In this way, the lithium secondary battery inhibits growth of dendrite and improves energy density. Also, the lithium secondary battery that has a partition wall structure reduces leakage even when liquid electrolytes are used and actively copes with pressure applied to the battery.

Abstract: A multi-reflecting device includes a plurality of double reflecting surfaces formed serially on the rear of a light guide plate having a taper shape. A light incident upon the light guide plate is double-reflected, and progress in a desired direction. The multi-reflecting structure is applied to a backlight unit and a display device so that the backlight unit and the display device can be slimmer economically.

Abstract: A lithium metal battery is provided. Electrolytes of the lithium metal battery are divided between an anode and a cathode into a plurality of regions not to contact with each other, thereby limiting movement paths of lithium ions. In this way, the lithium metal battery inhibits growth of dendrite and improves energy density. Also, the lithium metal battery that has a partition wall structure reduces leakage even when liquid electrolytes are used and actively copes with pressure applied to the battery.

Abstract: A multi-reflecting Light device includes a plurality of double reflecting surfaces formed serially on the rear of a light guide plate having a taper shape. A light incident upon the light guide plate is double-reflected, and progress in a desired direction. The multi-reflecting structure is applied to a backlight unit and a display device so that the backlight unit and the display device can be slimmer economically.