METHOD FOR DEPOSITING THIN LAYERS ON A POROUS SUBSTRATE, FUEL CELL AND FUEL CELL COMPRISING SUCH A THIN LAYER

摘要

The invention concerns a method for depositing on the surface of a porous substrate, thin layers of at least a solid ionic conductor comprising at least a base oxide and at least a doping agent. The deposition is carried out from precursor ln of the metal ion of one of the base oxides, precursor II oxidising the precursor In and, precursor IIIm of one of the oxides inputting one of the doping agents; n and m being each an integer not less than 1. Said method consists in providing at least a base oxide in a first sequence, and at least a doping agent in a second sequence. The first sequence is repeated from 1 to 10 times, the second only once; the whole process constitutes a cycle. The deposition is produced for a (first/second) sequence ratio determined on the basis on the (doping agent(s)/basic oxide(s)) atomic ratio and for a number of cycles determined on the basis of the thickness of the thin layer, and finally for a specific contacting duration between precursors and substrate. The invention also concerns a fuel cell, and a cell containing such a thin layer.