NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

Disclosed is a nonaqueous electrolyte secondary battery comprising a positive electrode capable of adsorbing and desorbing lithium, a negative electrode capable of adsorbing and desorbing lithium, a separator interposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The positive electrode contains, as an active material, a complex oxide represented by the following formula (1): LiNixM1-x-yLyO2 wherein 0.3 <= x <=0.9, 0 <= y <= 0.1, the element M represents at least one selected from the group consisting of Co and Mn, and the element L represents at least one selected from the group consisting of Mg, Al, Ti, Sr, Zn, B, Ca, Cr, Si, Ga, Sn, P, V, Sb, Nb, Ta, Mo, W, Zr, Y and Fe. The nonaqueous electrolyte contains a main solvent, a solute and vinyl ethylene carbonate.