Proton-conductive electrochemical device with integrated reforming and associated production method

A method for manufacturing a proton-conductive electrochemical device, comprising:

• manufacturing a positive electrode able to reduce an oxidizing species;
• manufacturing a negative electrode able to oxidize a reducing species;
• manufacturing a proton-conductive electrolyte, occupying a space between the positive electrode and a negative electrode and allowing the conduction of protons between the positive electrode and the negative electrode;
• the method further comprising:
• manufacturing a layer able to diffuse protons and electrons and forming a protective barrier against contaminants for the proton-conductive electrolyte, said layer being in contact with both the proton-conductive electrolyte and the negative electrode, the layer able to diffuse protons and electrons comprising a material of the type ABB′O3 or a material of the type ABO3, wherein A is an element chosen from group II of the periodic table, B is an element chosen from cerium and group IVB of the periodic table, B′ is an element chosen from lanthanides or group VIIIB of the periodic table, and
• wherein the layer able to diffuse protons and electrons has a porosity of less than 10% by volume.