An organic electrolytic solution for a lithium primary or secondary battery includes a lithium salt; an organic solvent; a radical initiator represented by Formula 1 below; and a polymerizable monomer represented by Formula 2 below: R1—N2+X−   wherein R1, R2, R3, R4, and X− are described herein. The organic electrolytic solution improves charge-discharge efficiency and increases cell capacity of the lithium primary or secondary battery.