NOVELTY - A lithium ion secondary battery has a positive electrode containing a positive electrode active material having operating electric potential of 4.5 V or more with respect to lithium metal, and a non-aqueous electrolyte containing fluorosulfonyl anion (FSI), cyclic carbonate and at least one compound chosen from fluorinated ether, fluorinated phosphate ester (II) and sulfone compound (III) and (IV).    USE - Lithium ion secondary battery used as power supply for mobile telephones, notebook computer, electric vehicles and aircrafts.    ADVANTAGE - The lithium ion secondary battery has excellent cycle characteristics, and evolution of gas is suppressed.    DETAILED DESCRIPTION - A lithium ion secondary battery has a positive electrode containing a positive electrode active material having operating electric potential of 4.5 V or more with respect to lithium metal, and a non-aqueous electrolyte containing fluorosulfonyl anion (N(SO2F)2) (FSI), cyclic carbonate and at least one compound chosen from fluorinated ether of formula: R1-O-R2, fluorinated phosphate ester of formula (II) and sulfone compound of formulae (III) and (IV).    R1,R2=alkyl or fluorinated alkyl, and at least one is fluorinated alkyl;    R',R"=optionally substituted alkyl;and    R3=optionally substituted alkylene.    An INDEPENDENT CLAIM is included for manufacture of lithium ion secondary battery having electrode element, electrolyte solution and an exterior component, which involves opposingly arranging the positive electrode having positive electrode active material capable of occluding and discharging lithium, and negative electrode, producing electrode element, and enclosing components in exterior component.    DESCRIPTION OF DRAWING(S) - The drawing shows the sectional view of secondary battery.    Positive electrode active material layer (1)    Negative electrode active material layer (2)    Positive electrode electrical power collector (3)    Anode collector (4)    Separator (5)    Lamination exterior component (6)    Negative electrode tab (7)    Positive electrode tab (8)