Lithium secondary battery
AssigneeSK Innovation Co., Ltd.
InventorsKook Hyun HAN, Kyung Bin YOO, Duck Chul HWANG
Life of this patent
Estimating the term…
Abstract
The present invention relates to a lithium secondary battery, more particularly relates to a lithium secondary battery having improved life-span property and penetration safety. The lithium secondary battery of the present invention includes a cathode active material including a metal that has a concentration gradient region, and an anode and a separation layer each including a ceramic coating layer so that life-span property and penetration safety can be remarkably improved.
Claims9
A lithium secondary battery, comprising a cathode, an anode, and a separation layer interposed between the cathode and the anode,
- wherein the cathode includes a cathode active material containing a lithium-metal oxide of which at least one of metals therein has a concentration gradient region between a central portion and a surface portion,
- wherein at least one of the anode and the separation layer includes a ceramic coating layer on a surface thereof, and a sum of a thickness of the ceramic coating layer is 4 μm or more.
Dependencies are inferred from the claim text.