NOVELTY - A nonaqueous electrolyte secondary battery has a positive electrode containing lithium complex oxide with an anode mix layer (52) which is maintained at an electroconductive positive electrode collector (51) and positive electrode collector, a negative electrode with a cathode mix layer which is maintained at an electroconductive negative electrode collector and negative electrode collector, a porous insulating layer provided between the positive electrode and negative electrode, and a nonaqueous electrolyte.    USE - Nonaqueous electrolyte secondary battery such as lithium ion secondary cell is used for electronic device.    ADVANTAGE - The nonaqueous electrolyte secondary battery has excellent lightweight property, high energy density, and excellent safety during overcharge and internal short circuit.    DETAILED DESCRIPTION - A nonaqueous electrolyte secondary battery has a positive electrode containing lithium complex oxide with an anode mix layer which is maintained at an electroconductive positive electrode collector and positive electrode collector, a negative electrode with a cathode mix layer which is maintained at an electroconductive negative electrode collector and negative electrode collector, a porous insulating layer provided between the positive electrode and negative electrode, and a nonaqueous electrolyte. The negative electrode contains occlusion and a dischargeable negative electrode active material for lithium ion electrochemically. The porous insulating layer produces shutdown phenomenon at 140 degrees C or more, or does not produce shutdown phenomenon. The lithium complex oxide with olivine structure or spinel structure has dotted with or covered the interface to the interface of the positive electrode collector and the anode mix layer.    DESCRIPTION OF DRAWING(S) - The drawing shows the sectional view of the lithium ion secondary cell.    Positive electrode active material (10)    Positive electrode collector (51)    Anode mix layer (52)