Electrode active material and lithium secondary battery comprising the same

1. A cathode active material for secondary batteries comprising at least one selected from compounds having a function of being capable of deintercalation and intercalation of lithium ions, represented by the following formula 1:

Li x Mo 4−y M y O 6−z A z   (1)

wherein

0<x≦2;

0<y≦0.5;

0≦z≦0.5;

M is at least one selected from the group consisting of W, Nb, V, Al, Mg, Ti, Co, Ni and Mn; and

A is at least one selected from the group consisting of halogen, S and N.

2. The cathode active material according to claim 1 , wherein x satisfies 0<x≦1.

3. A cathode in which the cathode active material according to claim 1 is applied to a current collector.

4. A lithium secondary battery comprising the cathode according to claim 3 .

5. The lithium secondary battery according to claim 4 , the lithium secondary battery comprises an anode comprising carbon, metal composite oxides, a lithium metal, lithium alloys, silicon-based alloys, tin-based alloys, metal oxides, conductive polymers, or Li—Co—Ni based materials,

wherein the anode comprising carbon is non-graphitized carbon and graphitized carbon,

wherein the metal composite oxides is Li x Fe 2 O 3 (0≦x≦1), Li x WO 2 (0≦x≦1) or Sn x Me 1−x Me′ y O z (Me: Mn, Fe, Pb, Ge; Me′: Al, B, P, Si, Group I, II and III elements of the Periodic Table, halogen atoms; 0<x≦1; 1≦y≦3; and 1≦z≦8),

wherein the metal oxides is at least one selected from the group consisting of SnO, SnO 2 , PbO, PbO 2 , Pb 2 O 3 , Pb 3 O 4 , Sb 2 O 3 , Sb 2 O 4 , Sb 2 O 5 , GeO, GeO 2 , Bi 2 O 3 , Bi 2 O 4 , and Bi 2 O 5 , or

wherein the conductive polymers is polyacetylene.

6. The lithium secondary battery according to claim 5 , wherein the anode comprises the carbon that is non-graphitized carbon and graphitized carbon.

7. The lithium secondary battery according to claim 5 , wherein the anode comprises the metal composite oxides that is Li x Fe 2 O 3 (0≦x≦1), Li x WO 2 (0≦x≦1) or Sn x Me 1−x Me′ y O z (Me: Mn, Fe, Pb, Ge; Me′: Al, B, P, Si, Group I, II and III elements of the Periodic Table, halogen atoms; 0<x≦1; 1≦y≦3; and 1≦z≦8).

8. The lithium secondary battery according to claim 5 , wherein the anode comprises the metal oxides that is at least one selected from the group consisting of SnO, SnO 2 , PbO, PbO 2 , Pb 2 O 3 , Pb 3 O 4 , Sb 2 O 3 , Sb 2 O 4 , Sb 2 O 5 , GeO, GeO 2 , Bi 2 O 3 , Bi 2 O 4 , and Bi 2 O 5 .

9. The lithium secondary battery according to claim 5 , wherein the anode comprises the conductive polymers that is polyacetylene.

10. A battery module comprising the lithium secondary battery according to claim 4 as a unit battery.

11. A power storage device comprising the battery module according to claim 10 .