Lithium metal anode, fabrication method thereof, and lithium secondary battery comprising same anode

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
• a coating layer disposed on a surface of the lithium metal thin film layer,
• wherein the lithium metal thin film layer is disposed between the current collector and the coating layer, and
• the coating layer comprises a Li—N—C—H—O based ionic compound represented by formula (1) or formula (2),
• wherein the Li—N—C—H—O based ionic compound comprises Li—O, C—N, C—O, and C—H bonds,
• wherein the lithium metal thin film layer has a columnar microstructure extending from the current collector and a flat surface morphology free of dendrites, and the Li—N—C—H—O based ionic compound uniformly disposed across the flat surface of the lithium metal thin film layer:
• wherein in the formula 1, R1 and, R2 are each CHmF2-m, m is one of 1 or 2,
• A1 is
• and n1 is an integer of 1 to 10,
• wherein in the formula 2, R3, and R4 are each CHmF2-m, m is one of 1 or 2,
• A2 is
• and n2 is an integer of 1 to 10.