| abstract |
A positive electrode and a negative electrode capable of occluding and releasing lithium, a separator and a nonaqueous electrolyte interposed therebetween, and the positive electrode satisfies LiM 1-x L x O 2 (0.005 ≦ x ≦ 0.1, and M is Mn, At least one selected from the group consisting of Co and Ni, L is Mg, Al, Ti, Sr, Zn, B, Ca, Cr, Si, Ga, Sn, P, V, Sb, Nb, Ta, Mo, Non-aqueous electrolyte, including a positive electrode active material represented by at least one selected from the group consisting of W, Zr, Y and Fe),n n n [Equation 1]n n n n n n n n A nonaqueous electrolyte secondary battery containing a phosphinate compound represented by (R 1 , R 2 and R 3 are each independently an aryl group or an alkyl group having 1 to 5 carbon atoms, an alkenyl group or an alkynyl group).n n n n Secondary battery, lithium, nonaqueous electrolyte, cathode active material, phosphinate |