Patent ID: 8435681

Claim:
A non-aqueous electrolyte solution comprising: a lithium salt; a non-aqueous solvent; and a compound expressed by the following general formula (IIc) in a concentration of 0.01 weight % to 4 weight % with respect to the non-aqueous electrolyte solution wherein Z 6 represents an integer of 2 or larger, X 6 represents a Z 6 -valent hydrocarbon group having 1-6 carbon atoms, R 61 represents, independently of each other, an alkyl group having 1-6 carbon atoms, R 62 represents, independently of each other, an alkyl group having 1-6 carbon atoms substituted by one or more halogen atoms and any two or more of R 61 and/or R 62 may be linked with each other to form a ring.