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US 9,318,738 B2Granted
Lithium secondary battery including multi-layered active material layers
AssigneeLG Chem, Ltd.
InventorsJi Sun Kim, Min Ho Youn, Dong Seok Shin, Hyo Seok Park
Life of this patent
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Abstract
A lithium secondary battery of the present invention may simultaneously improve high output and high capacity characteristics by including a first active material layer having high output characteristics and a second active material layer having high capacity characteristics respectively on a cathode collector and an anode collector.
Claims20
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.
10 more elements
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 transition metal oxide on the first anode active material layer are sequentially formed,
- wherein the transition metal oxide comprises any one selected from the group consisting of SnO2, Fe2O3, Fe3O4, NiO, CoO, Co2O3, CO3O4, Sn1-xTixO2 (x=0.1 to 0.9), Zn2SnO4, CoSnO3, CaSnO3, ZnCo2O4, Co2SnO4, Mg2SnO4, Mn2SnO4, and a mixture of two or more thereof.
5 more elements
Dependencies are inferred from the claim text.