abstract |
A rechargeable lithium battery includes a positive electrode, a negative electrode, and an electrolyte including a lithium salt, wherein at least one of the positive electrode and the negative electrode includes a current collector, an electrode tab extending from the current collector, an active material layer disposed on the current collector, and a passivation film formed on at least one of the current collector and the electrode tab. The passivation film includes a material represented by Chemical Formula 1: n CuX(POF 2 ) n Y 2 Z, Chemical Formula 1n n wherein, in Chemical Formula 1, X is a C 1 to C 10 alkylene group, Y is represented by Chemical Formula 2, Z is an anion group of the lithium salt, and n is 1 or 2: n NC—R 1 —CN, (wherein, R 1 is a C 1 to C 10 alkylene group). Chemical Formula 2 |