METHOD FOR ELECTROPHORETIC DEPOSITION OF LAYER OF DOPED BISMUTH OXIDE ON SUPPORTING SOFC ELECTROLYTE ON CATHODE SIDE Russian patent published in 2024 - IPC C25D13/02 H01M8/10 

FIELD: sintering technology.

SUBSTANCE: invention relates to the technology of deposition of functional layers of a solid oxide fuel cell (SOFC) by electrophoretic deposition and can be used to create medium-temperature SOFC cells with a two-layer electrolyte to form an electrolyte layer based on doped bismuth oxide on the cathode side. The method involves preparing a suspension from Bi_1.6Er_0.4O₃ (EDB) electrolyte powder, which is additionally previously annealed at a temperature of 650°C for 1 hour, with a concentration of 10 g/l in isopropyl alcohol with the addition of 0.26 g/l polyethylenimine (PEI) and 0.15 g/l acetylacetone, dispersing the components in a suspension of electrolyte powder by ultrasonic treatment for 125 minutes followed by electrophoretic deposition a layer of doped bismuth oxide on a Ce_0.8Sm_0.2O_1.9 electrolyte substrate (SDC) with a conductive sublayer of polypyrrole (PPy), whereas the electrophoretic deposition of a layer of doped bismuth oxide is carried out in two deposition-sintering cycles at a constant voltage of 80 V for 2 minutes followed by drying and sintering at a temperature of 850°C for 5 hours.

EFFECT: dense layer of electrolyte based on doped bismuth oxide on a supporting SOFC electrolyte without the use of expensive equipment with a minimum number of deposition-sintering cycles.

1 cl, 3 dwg