Patent ID: 7901813

Claim:
A non-aqueous electrolyte lithium ion secondary battery comprising: a) an anode capable of adsorbing and releasing lithium; b) a cathode capable of adsorbing and releasing lithium; and c) a non-aqueous electrolyte solution comprising a lithium salt, an aprotic solvent, and an organometallic compound represented by the following Chemical Formula 1a: Si(R 1 ) y (OR) x-y-z (OH) z [Chemical Formula 1a] wherein R 1 is a phenyl group or a halogen-substituted phenyl group coordinated with a central metal atom; R is an alkyl group coordinated with a central metal atom; x is a valence of a central metal atom; y is a value satisfying 0<y<x; and z is a value satisfying 0<z<x.