Non-aqueous liquid electrolyte and non-aqueous liquid electrolyte secondary battery using the same

A non-aqueous liquid electrolyte to be used for a non-aqueous liquid electrolyte secondary battery comprising a anode electrode and a cathode electrode, capable of intercalating and deintercalating lithium ions, and the non-aqueous liquid electrolyte,

• wherein said non-aqueous liquid electrolyte contains, at least, a carbonate having at least either an unsaturated bond or a halogen atom, and a compound of formula (III-1)
• A-N═C═ (III-1)
• wherein in formula (III-1), A represents an element or group other than a hydrogen wherein said compound of formula (III-1) is selected from the group consisting of a compound of formula (III-2)
• wherein in formula (III-2),
• X1 and X2 represent, independently of each other, an element other than hydrogen,
• Z represents an arbitrary element or group,
• m and n represent, independently of each other, an integer greater than or equal to 1, and
• when m is 2 or greater, each of Z may be the same or different from each other and a compound of formula (III-3)
• wherein in formula (III-3),
• R represents, independently of each other, an alkyl group or aryl group that may have a substituent. In addition, more than one R may be connected to each other to form a ring.