Electrochemical device comprising a proton-conducting ceramic electrolyte

摘要

The invention relates to the use of a ceramic of formula Ba2(1−x)M2xIn2(1−y)M′2yO4+δ(OH)δ′ where M represents at least one metal cation with an oxidation number II or III or a combination thereof, M′ represents at least one metal cation with an oxidation number III, IV, V or VI or a combination thereof, 0≦x≦1, 0≦y≦1, δ≦2 and 0 <δ′≦2, as solid proton-conducting electrolyte in an electrochemical device, in particular a fuel cell, an electrolytic cell, a membrane separating hydrogen from a gas mixture, or also a hydrogen detector, at an operating temperature of said electrochemical device preferably comprised between 200° C. and 600° C.

主权项

1. A process for producing an electric current comprising the steps of
providing a fuel cell comprising an anode compartment with an anode, and a cathode compartment with a cathode, the two compartments being separated by a proton- conducting ceramic electrolyte of formula
Ba2In2(1−y)M′2yO4+δ(OH)δ′ where M′ represents at least one metal cation with an oxidation number III, IV, V or VI or a combination thereof, 0≦y≦1,δ≦2 and 0<δ′≦2, and an electrical circuit connecting the anode to the cathode, feeding the anode compartment with hydrogen or with a gas mixture containing hydrogen, and feeding the cathode compartment with oxygen or air, wherein the fuel cell is operated at a temperature of at least 200° C.