Patent ID: 7014954

Claim:
A nonaqueous electrolyte secondary battery comprises a cathode having a cathode active material capable of being electrochemically doped/dedoped with lithium; an anode having an anode active material capable of being electrochemically doped/dedoped with lithium and a nonaqueous electrolyte interposed between the cathode and the anode, wherein said cathode active material is a lithium composite oxide expressed by a general formula Li x MO 2 (here, x is not smaller than 0.9 and M indicates at least one or more elements selected from between Fe, Co, Mn, Cu, Zn, Al, Sn, B, Ga, Cr, V, Ti, Mg, Ca and Sr) and said nonaqueous electrolyte includes a vinylene carbonate and at least one kind of material selected from between quinones, aromatic amines, vitamin E, vitamin C, sesamoles and quercetins.