Patent ID: 6864016

Claim:
A non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode and a non-aqueous electrolyte obtained by dissolving a solute in a non-aqueous solvent, wherein said non-aqueous electrolyte contains: at least one selected from the group consisting of LiPF 6 , LiBF 4 , LiSbF 6 and LiAsF 6 ; and at least one selected from the group consisting of, a compound represented by the formula(2): LiPF c (C d F 2d+1 SO 2 ) 6−c where c is an integer of 1 to 5 and d is an integer not less than 1; a compound represented by the formula(3): LiBF e (C 1 F 2f+1 ) 4−e where e is an integer of 1 to 3 and f is an integer not less than 1; and a compound represented by the formula(4): LiBF g (C h F 2h+1 SO 2 ) 4−g where g is an integer of 1 to 3 and h is an integer not less than 1.