HYDROGEN PERMEABLE FILM, AND FUEL BATTERY USING THE SAME

摘要

This invention provides a 1 nm to 100 nm-thick hydrogen permeable film (1) comprising a V- or V alloy-containing hydrogen permeable base material (2), a Pd- or Pd alloy-containing hydrogen permeable Pd film (3), and an intermediate layer (4) provided between the hydrogen permeable base material (2) and the Pd film (3) and comprising a first intermediate layer (5) in contact with the hydrogen permeable base material (2) and a second intermediate layer (6) in contact with the Pd film (3). The first intermediate layer (5) contains at least any of Ta, Nb, and their alloys. The second intermediate layer (6) contains at least any of group 8 elements, group 9 elements and group 10 elements and their alloys. There is also provided a fuel battery comprising the hydrogen permeable film and a proton conductive film provided on the Pd film in the hydrogen permeable film. The hydrogen permeable film can suppress mutual diffusion among the hydrogen permeable base material, the intermediate layer, and the Pd film and can solve a problem of a lowering in hydrogen permeability with the elapse of time. The fuel battery does not cause a lowering in electromotive force with the elapse of time.