Anode for lithium secondary battery, and lithium secondary battery

1 . An anode for a lithium secondary battery, the anode comprising:

a current collector;

an anode active material layer including an anode active material formed on the current collector; and

a coating part formed on the anode active material layer,

wherein the coating part and the anode active material layer include particles of a CHF—CO 3 group-containing compound,

wherein an amount of the CHF—CO 3 group-containing compound particles included in the anode is 3 wt % to 6 wt %, based on the total of 100 wt % of the anode active material layer and the coating part, and

wherein the CHF—CO 3 group-containing compound is represented by Chemical Formula 1 or Chemical Formula 2:

wherein, in Chemical Formula 2,

x and y are each a mole fraction, and

0.1≤x≤0.9, 0.1≤y≤0.9, and x+y=1.

2 . The anode of claim 1 , wherein the CHF—CO 3 group-containing compound particles have an average particle diameter (D50) of 2 μm or less.

3 . The anode of claim 1 , wherein the CHF—CO 3 group-containing compound particles have an average particle diameter (D50) of 100 nm to 2 μm.

4 . The anode of claim 1 , wherein the coating part is formed by agglomerating the CHF—CO 3 group-containing compound particles.

5 . The anode of claim 1 , wherein the coating part has a thickness of 100 nm to 2 μm.

6 . A lithium secondary battery, comprising

the anode of claim 1 ;

a cathode; and

a non-aqueous electrolyte.

7 . The anode of claim 1 , wherein the anode active material includes a carbon-based active material, a silicon-based active material, or a combination thereof.

8 . The anode of claim 1 , wherein the anode active material is crystalline carbon, amorphous carbon, or a combination thereof.

9 . The anode of claim 1 , wherein the anode active material is Si, a Si—C composite, SiOx (0<x<2), or a Si-Q alloy, wherein Q is an element selected from an alkali metal, an alkaline-earth metal, a Group 13 element, a Group 14 element, a Group 15 element, a Group 16 element, a transition metal, a rare earth element, or a combination thereof, but is not Si.

10 . The anode of claim 1 , wherein the anode active material is Sn, SnO2, or a S—R alloy, wherein R is an element selected from an alkali metal, an alkaline-earth metal, a Group 13 element, a Group 14 element, a Group 15 element, a Group 16 element, a transition metal, a rare earth element, or a combination thereof, but is not Si.

11 . The anode of claim 1 , wherein:

the CHF—CO 3 group-containing compound is represented by Chemical Formula 2, and

a weight-average molecular weight of the CHF—CO 3 group-containing compound represented by Chemical Formula 2 is 1000 g/mol to 5,000,000 g/mol.