NOVELTY - The battery (1) has separator (13) that is positioned such that it is located between positive electrode (10), negative electrode (11) and polymer layer (12) provided in surface of negative electrode active material layer (23). The positive electrode contains active material layer (21) and positive electrode collector (20) containing positive electrode active material that discharges lithium ion. The negative electrode contains active material layer and negative electrode collector (22) containing an alloy-system negative electrode active material.    USE - Non aqueous electrolyte secondary battery. Uses include but are not limited to portable electronic devices such as personal computer, mobile telephone, personal digital assistant (PDA), portable game apparatus, video camera and electric vehicles such as hybrid electric vehicle and fuel cell electric vehicle, electric-motor drive, electric tool, vacuum cleaner, robot etc.    ADVANTAGE - Since the adhesiveness of negative electrode active material layer, polymer layer and separator are maintained at high level over a long period of time, the frequency of a charging/discharging cycle increases. Thus the fall of battery performance such as discharge capacity, charge-and-discharge characteristic and rate characteristic can be suppressed and the battery with outstanding performance can be obtained. The separator tracks the volume change of an alloy-system negative electrode active material so that the stress generated by the alloy-system negative electrode active material layer can be relieved. Thus the peeling from a deformation of a negative electrode collector of negative electrode active material layer can be suppressed.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross sectional view of the non aqueous electrolyte secondary battery.    Non aqueous electrolyte secondary battery (1)    Positive electrode (10)    Negative electrode (11)    Polymer layer (12)    Separator (13)    Positive electrode collector (20)    Positive electrode active material layer (21)    Negative electrode collector (22)    Negative electrode active material layer (23)