SEPARATOR FOR ELECTRICAL DEVICE, AND ELECTRICAL DEVICE USING SAME

A separator for an electric device (1) includes: a porous substrate layer (3); and first and second ceramic layers (5a, 5b) formed on the respective surfaces of the porous substrate layer and each containing ceramic particles and a binder, wherein a specific surface area of the first ceramic layer (5a) is smaller than a specific surface area of the second ceramic layer (5b), and the first ceramic layer (5a) is located towards a negative electrode of an electric device.