Non-aqueous electrolyte secondary battery

A non-aqueous electrolyte secondary battery comprising:

• a positive electrode comprising a positive electrode mixture;
• a negative electrode comprising a negative electrode mixture;
• and a non-aqueous electrolyte,
• wherein said negative electrode mixture includes a material capable of absorbing and desorbing Li and a carbon material,
• said material capable of absorbing and desorbing Li includes at least one element selected from the group consisting of Si and Sn,
• the amount of said carbon material is 3 to 60% by weight of said negative electrode mixture,
• at least one of said positive electrode, said negative electrode, and said non-aqueous electrolyte contains a lithium perfluoroalkylsulfonyl imide represented by the following general formula (1):
• LiN(CmF2m+1SO2)(CnF2n+1SO2) (1)
• where m and n each represent an integer of 1 to 5 and may be m=n, and
• the ratio of the total weight of said lithium perfluoroalkylsulfonyl imide contained in at least one of said positive electrode, said negative electrode, and said non-aqueous electrolyte to the weight of said carbon material is 10−3 to 10.