Electrolytic solutions and battery

A secondary battery comprising:

• a cathode;
• an anode;
• an electrolytic solution;
• and
• an electrolyte salt including at least one kind selected from the group consisting of compounds represented by Chemical Formulas 46, 47 and 48:
• where X31 represents a Group 1A element or a Group 2A element in the short form of the periodic table of the elements, or aluminum, M31 represents a transition metal, or a Group 3B element, a Group 4B element or a Group 5B element in the short form of the periodic table of the elements, R31 represents a halogen group, Y31 represents —OC—R32-CO—, —OC—CR332- or —OC—CO—, in which R32 represents an alkylene group, a halogenated alkylene group, an arylene group or a halogenated arylene group, and R33 represents an alkyl group, a halogenated alkyl group, an aryl group or a halogenated aryl group, and a3 is an integer of 1 to 4 both inclusive, and b3 is 0 or an integer of 2 or 4, and c3, d3, m3 and n3 each are an integer of 1 to 3 both inclusive,
• where X41 represents a Group 1A element or a Group 2A element in the short form of the periodic table of the elements, M41 represents a transition metal, or a Group 3B element, a Group 4B element or a Group 5B element in the short form of the periodic table of the elements, Y41 represents —OC—(CR412)b4-CO—, R432C—(CR422)c4-CO—, R432C—(CR422)c4-CR432-, —R432C—(CR422)c4-SO2—, —O2S—(CR422)d4-SO2—or —OC—(CR422)d4-SO2—, in which R41 and R43 each represent a hydrogen group, an alkyl group, a halogen group or a halogenated alkyl group and at least one of them is a halogen group or a halogenated alkyl group, and R42 represents a hydrogen group, an alkyl group, a halogen group or a halogenated alkyl group, and a4, e4 and n4 each are an integer of 1 or 2, b4 and d4 each are an integer of 1 to 4 both inclusive, c4 is 0 or an integer of 1 to 4 both inclusive, and f4 and m4 each are an integer of 1 to 3 both inclusive,
• where X51 represents a Group 1A element or a Group 2A element in the short form of the periodic table of the elements, M51 represents a transition metal, or a Group 3B element, a Group 4B element or a Group 5B element in the short form of the periodic table of the elements, Rf represents a fluorinated alkyl group having 1 to 10 carbon atoms or a fluorinated aryl group having 1 to 10 carbon atoms, Y51 represents —OC—(CR512)d5-CO—, —R522C—(CR512)d5-CO—, —R522C—(CR512)d5-CR522-, —R522C—(CR512)d5-SO2—, —O2S—(CR51 2)e5-SO2— or —OC—(CR512)e5-SO2—, in which R51 represents a hydrogen group, an alkyl group, a halogen group or a halogenated alkyl group, and R52 represents a hydrogen group, an alkyl group, a halogen group or a halogenated alkyl group and at least one of them is a halogen group or a halogenated alkyl group, and a5, f5 and n5 each are an integer of 1 or 2, b5, c5 and e5 each are an integer of 1 to 4 both inclusive, d5 is 0 or an integer of 1 to 4 both inclusive, and g5 and m5 each are an integer of 1 to 3 both inclusive,
• wherein the electrolytic solution includes a solvent including a sulfone compound selected from the group consisting of compounds represented by Chemical Formulae 41(1) to 41(8) and a cyclic carbonate selected from the group consisting of 4-fluoro-1,3-dioxolan-2-one, trans-4,5-difluoro-1,3-dioxolan-2-one and cis-4,5-difluoro-1,3-dioxolan-2-one:
• wherein a content of the sulfone compound in the solvent is within a range from 1 wt % to 10 wt % both inclusive, wherein the anode includes an anode active material including at least silicon, and
• wherein a content of the cyclic carbonate ranges from 1 wt % to 5 wt %.