Non-aqueous electrolytic solution and lithium battery

2:

• The non-aqueous electrolytic solution of claim 1, further comprising:
• from 0.2 to 3% by weight of at least one S═O group-comprising compound.

3:

• The non-aqueous electrolytic solution of claim 2, wherein the S═O group-comprising compound is at least one selected from the group consisting of dimethylsulfite, diethylsulfite, ethylenesulfite, propylenesulfite, vinylenesulfite, dimethylsulfone, diethylsulfone, methylethylsulfone, divinylsulfone, sulforane, sulforene, methyl methanesulfonate, ethyl methanesulfonate, propargyl methanesulfonate, methyl benzenesulfonate, 1,3-propanesultone, 1,4-butanesultone, dimethyl sulfate, diethylsulfate, ethyleneglycol sulfate, and 1,2-propanediol sulfate.

4:

• The non-aqueous electrolytic solution of claim 1, wherein the non-aqueous solvent comprises a cyclic carbonate.

5:

• The non-aqueous electrolytic solution of claim 4, wherein the cyclic carbonate is at least one selected from the group consisting of ethylene carbonate, propylene carbonate, butylene carbonate, and vinylene carbonate.

6:

• The non-aqueous electrolytic solution of claim 5, wherein the cyclic carbonate comprises vinylene carbonate.

7:

• The non-aqueous electrolytic solution of claim 1, wherein the non-aqueous solvent comprises at least one of a linear carbonate selected from the group consisting of dimethyl carbonate, methyl ethyl carbonate, diethyl carbonate, dipropyl carbonate, and dibutyl carbonate.

8:

• The non-aqueous electrolytic solution of claim 7, in which the linear carbonate comprises methyl ethyl carbonate.

9:

• The non-aqueous electrolytic solution of claim 1, wherein the non-aqueous electrolytic solution comprises from 0.5 to 1.5 M of the electrolyte.

10:

• The non-aqueous electrolytic solution of claim 9, wherein the electrolyte is at least one selected from the group consisting of LiPF6, LiBF4, LiAsF6, LiClO4, LiOSO2CF3, LiN(SO2CF3)2, LiN(SO2C2F5)2, LiC(SO2CF3)3, LiPF4(CF3)2, LiPF3(CF3)3, LiPF3(C2F5)3, LiPF5(iso-C3F7), LiPF4(iso-C3F7)2, and LiBF3(C2F5).

11:

• The non-aqueous electrolytic solution of claim 10, wherein the electrolyte comprises LiPF6.

13:

• The lithium secondary battery of claim 12, wherein the positive electrode comprises a lithium element and a complex metal oxide containing one metal element selected from the group consisting of cobalt, manganese, nickel, chromium, iron, and vanadium.

14:

• The lithium secondary battery of claim 13, wherein the complex metal oxide comprises at least one selected from the group consisting of LiCoO2, LiMn2O4, LiNiO2 and LiCO1-xNixO2(0.01<x<1).

16:

• The lithium secondary battery of claim 15, wherein the positive electrode comprises a lithium element and a complex metal oxide containing one metal element selected from the group consisting of cobalt, manganese, nickel, chromium, iron, and vanadium.

17:

• The lithium secondary battery of claim 16, wherein the complex metal oxide comprises at least one selected from the group consisting of LiCoO2, LiMn2O4, LiNiO2 and LiCO1-xNixO2(0.01<x<1).

19:

• The lithium secondary battery of claim 18, wherein the positive electrode comprises a lithium element and a complex metal oxide containing one metal element selected from the group consisting of cobalt, manganese, nickel, chromium, iron, and vanadium.

20:

• The lithium secondary battery of claim 19, wherein the complex metal oxide comprises at least one selected from the group consisting of LiCoO2, LiMn2O4, LiNiO2 and LiCO1-xNixO2(0.01<x<1).