NONAQUEOUS ELECTROLYTE SECONDARY CELL

The non-aqueous electrolyte secondary battery of the present invention comprises, e.g., a positive electrode 6, a negative electrode 5, a polymer membrane 1 containing carbon powder or the like, and a separating membrane layer 7 for preventing shortcircuiting. A carbon powder, silicon powder, tin powder or aluminum powder 2 contained in the polymer membrane 1 containing carbon powder or the like absorbs as a lithium-intercalating material lithium powders 3 or dendrite 4 which has been produced from the negative electrode 5 due to charge or discharge and takes no part in charge or discharge. This lithium-intercalating material is less reactive than the lithium powders 3 or dendrite 4 and thus enhances the safety of the battery and controls shortcircuiting between the positive electrode and the negative electrode due to dendrite, making it possible to drastically improve charge and discharge cycle life performance.