To improve the cycle lifetime performance by using nickel oxyhydroxide as a positive electrode active material, and providing an electrolyte containing heterocyclic compound having nitrogen having a non-covalent electron pair as a structural element of a ring.

In manufacturing a positive electrode for lithium secondary battery, a metal collector of Ni, Al or the like is coated with the paste composed of the conductive material, such as nickel oxyhydroxide powder and graphite and the binder material such as polyethylene and dried. In manufacturing the electrolyte, Li salt such as lithium perchlorate is dissolved in the nonaqueous solvent containing a heterocyclic compound containing nitrogen having non-covalent electron pair as a structural element of a ring. The nonaqueous solvent can be obtained by adding a small quantity of the heterocyclic compound to a mixture solvent of ethylene carbonate and diethyl carbonate. As a heterocyclic compound, pyridine or pyrazine is preferably used.