Electrolyte solution for lithium secondary battery and lithium secondary battery using the same

摘要

Disclosed is an electrolyte solution used for a lithium secondary battery (1) having high capacity, less undergoing aging deterioration of capacity, and also excellent in life characteristic. The electrolyte solution used for a lithium secondary battery (1) contains a compound having a trivalent or higher boron formed by incorporation of a boroxine compound represented by (RO) 3 (BO) 3 in which R(s) each represent independently an organic group of 1 to 6 carbon atoms and LiPF 6 , and a non-aqueous solvent.