| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous secondary battery having the function of increasing internal resistance when the temperature rises, and suitable for reducing internal resistance during normal operation.SOLUTION: The nonaqueous secondary battery comprises a positive electrode, a negative electrode, and a nonaqueous electrolyte. At least one of the electrodes comprises an electrode mixture 326 containing an electrode active material, a collector 322 holding the electrode mixture 326, and a conductive layer 324 interposed between the collector 322 and the electrode mixture 326. The conductive layer 324 contains a conductive material and PVDF as a binder, and the mass ratio (α/&bgr;) of α-crystal to &bgr;-crystal in the PVDF based on the NMR spectrum is in the range of 0.35 to 0.56. |
