LITHIUM METAL ANODE, FABRICATION METHOD THEREROF, AND LITHIUM SECONDARY BATTERY COMPRISING SAME ANODE

1 . A lithium metal anode comprising:

a current collector;

a lithium metal thin film layer disposed on at least one surface of the current collector and having a thickness in a range of 0.1 μm to 200 μm; and

a coating layer disposed on a surface of the lithium metal thin film layer,

wherein, the coating layer comprising a Li—N—C—H—O based ionic compound.

2 . The lithium metal anode of claim 1 ,

wherein the coating layer further comprises LiF.

3 . The lithium metal anode of claim 1 ,

The Li—N—C—H—O based ionic compound comprises Li—O, C—N, C—O, and C—H bonds.

4 . The lithium metal anode of claim 1 ,

The Li—N—C—H—O based ionic compound is at least one of the compounds represented by formulas (1) and (2).

Li +− [O—R 1 —R 2  n 1 A 1 −+ Li  [Formula 1]

(wherein in the formula 1, R 1 and, R 2 are each CH m F 2-m (m is one of 0, 1, or 2),

A 1 is

and n1 is an integer of 1 to 10)

(wherein in the formula 2, R 3 , and R 4 are each CH m F 2-m (m is one of 0, 1, or 2),

A 2 is

and n2 is an integer of 1 to 10.)

5 . The lithium metal anode of claim 4 ,

the compound represented by the formula (1) is at least one of the compounds represented by the following formulas (1-1) and (1-2), and

the compound represented by the formula (2) is at least one of the compounds represented by the following formulas (2-1) and (2-2).

(wherein in the formula 1-1, n3 is an integer of 1 to 5.)

(wherein in the formula 1-2, R 5 and R 6 are each CH m F 2-m (m is one of 0, 1, or 2), and n4 is an integer of 1 to 5.)

(wherein in the formula 2-1, n5 is and integer of 1 to 5.)

(wherein in the formula 2-2, R 7 and R 8 are each CH m F 2-m (m is one of 0, 1, and 2), and n6 is an integer of 1 to 5.)

6 . The lithium metal anode of claim 1 ,

wherein a thickness of the coating layer is in a range of 2 nm to 2 μm.

7 . The lithium metal anode of claim 1 ,

wherein a thickness of the coating layer is in a range of 10 nm to 500 nm.

8 . The lithium metal anode of claim 1 ,

the lithium metal thin film layer has a flat surface microstructure without dendrite, and

the lithium metal thin film layer comprises a columnar structure extending upward from the current collector.

9 . The lithium metal anode of claim 8 ,

wherein an average diameter of the columnar structure is in the range of 0.1 μm to 100 μm.

10 . The lithium metal anode of claim 1 ,

wherein an average pore fraction of the lithium metal thin film layer is 10% or less.

11 . (canceled)

12 . (canceled)

13 . (canceled)

14 . (canceled)

15 . (canceled)

16 . (canceled)

17 . (canceled)

18 . A lithium secondary battery comprising:

an anode;

a cathode; and

electrolyte,

the anode is a lithium metal anode according to claim 1 .

19 . A lithium metal anode comprising:

a current collector;

a lithium metal thin film disposed on at least one surface of the current collector; and,

a protective layer disposed on the surface of the lithium metal thin film.

20 . The lithium metal anode of claim 19 ,

a thickness of the lithium metal thin film is from 5 μm to 100 μm.

21 . The lithium metal anode of claim 19 ,

a thickness of the protective layer is from 10 nm to 100 nm.

22 . The lithium metal anode of claim 19 ,

wherein the protective layer comprises at least one selected from the group consisting of F, P, C, O and S.

23 . (canceled)

24 . (canceled)

25 . (canceled)