POROUS METAL FILM, ELECTRODE, CURRENT COLLECTOR, ELECTROCHEMICAL SENSOR USING SAME, ELECTRIC STORAGE DEVICE, SLIDING MEMBER, AND METHOD FOR PRODUCING POROUS METAL FILM

摘要

Provided is a porous metal film. A plurality of holes (10) is formed in a porous metal film (2a) and opened in a surface (2a1) on the opposite side to a substrate (3). At least one hole (10a) of the plurality of holes (10) is provided such that the diameter thereof increases in a stepwise or continuous manner toward the surface (2a1) on the opposite side to the substrate (3).