Patent ID: 9673436
Date: 2017-06-06
CPC Classifications: H01M,Y02E,Y02P

Claim:
1. A nonaqueous electrolyte secondary battery comprising a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte solution, the battery further comprising a porous heat-resistant layer disposed between the separator and at least one of the positive electrode and the negative electrode, wherein the porous heat-resistant layer includes an inorganic filler and a binder, the inorganic filler included in the porous heat-resistant layer has a particle size distribution with two peaks, which are a first peak at a relatively small particle diameter and a second peak at a relatively large particle diameter, when the particle diameter of the first peak is D the average particle size of the filler particles is in the range of 0.8 μm to 1.5 μm, when a frequency of the first peak is F the porous heat-resistant layer has a porosity of 50.2% to 62.1%.