Anode for a lithium secondary battery with an interfacial layer made of phosphorous-doped graphitic carbon nitride and a single ion conducting polymer, a lithium secondary battery, and a manufacturing method thereof

A method for manufacturing a lithium secondary battery, the method comprising:

• preparing starting materials including a carbon nitride precursor compound and a phosphorous precursor compound;
• reacting the starting materials to prepare phosphorous-doped graphitic carbon nitride;
• preparing a solution comprising the phosphorous-doped graphitic carbon nitride and a single ion conducting polymer represented by Chemical Formula 1:
• wherein n is an integer in a range of 10 to 100,000;
• applying the solution onto a lithium metal layer to form an interfacial layer;
• manufacturing an electrode assembly in which the interfacial layer, a separator, and a cathode are sequentially laminated;
• and
• injecting an electrolyte into the electrode assembly.