| abstract |
(57) [Problem] To provide a non-aqueous secondary battery having high capacity and excellent cycle characteristics. SOLUTION: In a non-aqueous secondary battery having a positive electrode, a negative electrode and an electrolyte, using a 4V-class active material for the positive electrode, and having a discharge capacity per unit volume of the electrode laminate of 130 mAh / cm 3 or more, Contains a sultone compound having a -OS (= O) 2- bond or a derivative thereof. Examples of the sultone compound having a —OS (＝ O) 2 — bond or a derivative thereof include 1,3-propane sultone, 1,4-butane sultone, ethyl methane sulphonate, dimethyl sulphate, diethyl sulphate, 2-ethoxypentafluoropropane-1,2-sultone and the like are preferable, and the content thereof is preferably 0.05 to 8% by weight in the solvent component of the electrolyte. |