SEPARATOR FOR ELECTRIC DOUBLE LAYER CAPACITOR AND ELECTRIC DOUBLE LAYER CAPACITOR COMPRISING SAME

摘要

Disclosed is a separator for electric double layer capacitors which is characterized by having a total thickness of not more than 25 Vm and containing a very fine fiber assembly layer produced by electrostatic spinning. The separator for electric double layer capacitors is further characterized in that the very fine fibers constituting the very fine fiber assembly layer have an average fiber diameter of not more than 1 Vm and the maximum pore size of the very fine fiber assembly layer is not more than three times as large as the average flow rate pore size.