NOVELTY - An electrolytic solution (S1) contains a nonaqueous solvent, a lithium ion, an organic anion containing imidazole compound (I), and an inorganic anion having fluorine and an element of Group 13 to Group 15 in the long period periodic table as an element.    USE - An electrolytic solution for a lithium secondary battery used in an electric power tool, electrical vehicle, and electric power storage system (claimed), particularly used in portable electronic devices such as a video camera, a digital still camera, a mobile phone, a notebook personal computer, a cordless phone, a headphone stereo, a portable radio, a portable television, and a Personal Digital Assistant (PDA); a portable lifestyle device such as an electric shaver; a storage equipment such as a backup power source and a memory card; an electric drill and an electric saw; a medical electronic device such as a pacemaker and a hearing aid; electrical vehicle (including a hybrid car); and a home battery system for storing electric power for emergency or the like.    ADVANTAGE - The lithium secondary battery is capable of obtaining superior cycle characteristics, superior storage characteristics and superior load characteristics. Specially, the lithium ions are preferably generated from a state that the electrolytic solution contains a lithium salt containing the nitrogen-containing organic anion and a lithium salt containing the fluorine-containing inorganic anion, thus chemical stability of the electrolytic solution is sufficiently improved.    DETAILED DESCRIPTION - An electrolytic solution (S1) contains a non-`aqueous solvent, a lithium ion, an organic anion containing imidazole compound of formula (I), and an inorganic anion having fluorine and an element of Group 13 to Group 15 in the long period periodic table as an element.    R1 = electron-releasing group or an electron-withdrawing group;    R2 and R3 = electron-withdrawing group.    An INDEPENDENT CLAIM is included for a lithium secondary battery comprising: a cathode (21); an anode (22); and the electrolytic solution (S1).    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional diagram of a metallic article with a thermal barrier coating.    Electrode body (20)    Cathode (21)    Cathode active material layer (21B)    Anode (22)    Separator (23)