Patent ID: 9318738
Filing Date: 2016-04-19
CPC Classification: H01M,Y02E,Y02T

Claim Text:
1. A lithium secondary battery comprising: (1) a cathode in which a cathode collector; a first cathode active material layer including a spinel-structured lithium manganese oxide active material on at least one surface of the cathode collector; and a second cathode active material layer including a layer-structured lithium composite oxide active material on the first cathode active material layer are sequentially formed; and (2) an anode in which an anode collector; a first anode active material layer including an amorphous carbon-based active material on at least one surface of the anode collector; and a second anode active material layer including at least one selected from the group consisting of a silicon (Si)-based material, and a tin (Sn)-based material on the first anode active material layer are sequentially formed, wherein the silicon (Si)-based material comprises any one selected from the group consisting of single Si; a Si—C composite formed by mechanical alloying of Si and a carbonaceous material; a composite formed by mechanical alloying of Si and metal; a carbon-Si nanocomposite; Si coated with Si oxide and carbon, or Si oxide; and a mixture of two or more thereof.