Surface stabilized cathode material for lithium ion batteries and synthesizing method of the same

1. A compound represented by Formula (I):

Li α Co (1-x-2y) Me x (M1M2) y O δ   Formula (I)

wherein Me is selected from the group consisting one or more of Li, Mg, Al, Ca, Ti, Zr, V, Cr, Mn, Fe, Ni, Cu, Zn, Ru, and Sn;

wherein M1 is a metal having a +2 oxidation state selected from the group consisting of Ni, Mg, and Zn;

wherein M2 is a metal having a +4 oxidation state selected from the group consisting of Mn, Ti, Zr, and V;

wherein M1M2 represents pairs of M1 and M2; and

wherein 0<x≤0.3, 0<y≤0.4, 0.95≤α≤1.4, and 1.90≤δ≤2.10.

2. The compound of claim 1 , wherein M1 is Ni and M2 is Mn.

3. The compound of claim 1 , wherein the compound has a trigonal crystal structure.

4. The compound of claim 1 , wherein 0<y≤0.25.

5. The compound of claim 4 , wherein 0.02≤y≤0.06.

6. The compound of claim 5 , y is about 0.04.

7. The compound of claim 4 , wherein 0.05≤y≤0.09.

8. The compound of claim 7 , y is about 0.07.

9. The compound of claim 4 , wherein 0.08≤y≤0.12.

10. The compound of claim 9 , y is about 0.10.

11. The compound of any of claim 4 , wherein 0.14≤y≤0.18.

12. The compound of claim 11 , y is about 0.16.

13. The compound of claim 4 , wherein 0.20≤y≤0.25.

14. The compound of claim 13 , y is about 0.22.

15. The compound of claim 1 , wherein M1M2 represents a pair of M1 and M2 selected from the group consisting of NiMn, NiTi, MgTi, NiZr, MgMn, MgZr, NiV, or MgV.

16. A cathode comprising a cathode current collector and a cathode active material disposed over the cathode current collector, the cathode active material comprising the compound of claim 1 .

17. A battery cell comprising:

an anode comprising an anode current collector and an anode active material disposed over the anode current collector; and

the cathode of claim 16 .

18. A portable electronic device comprising:

the battery cell of claim 17 .