| abstract |
An electric double layer capacitor comprising a positivenelectrode assembly and a negative electrode assembly,neach electrode assembly having a porous layer comprisingna carbonaceous powder and a fluorine-containing polymernformed on at least one side of an aluminum foil currentncollector, the positive electrode and the negativenelectrode being disposed so that the porous layer of thenpositive electrode assembly and the porous layer of thennegative electrode assembly face each other with anseparator interposed therebetween to form an element, thenelement being impregnated with a non-aqueous electrolytenand accommodated in a sealed container, wherein thenthickness of the porous layer is from 80 to 200 µm, thenthickness of the aluminum foil current collector is fromn20 to 80 µm, the thickness of the separator is from 30 ton170 µm, and the density of the porous layer is from 0.50nto 0.80 g/cm 3 . |