Patent ID: 7803487

Claim:
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), X 1 and X 2 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.