THREE-LAYER SOLID ELECTROLYTE MEMBRANE OF MEDIUM TEMPERATURE SOFC Russian patent published in 2024 - IPC H01M8/126 

FIELD: electrolytes.

SUBSTANCE: invention relates to the design of a three-layer solid electrolyte membrane, which can be used in medium-temperature solid oxide fuel cells (SOFC). The membrane consists of a supporting solid electrolyte based on cerium dioxide of composition Ce_0.8Sm_0.2O_1.9 (SDC), on one side of which a thin-film anodic barrier layer is formed, and on the other there is a thin-film cathode modifying layer, whereas the thin-film anodic barrier layer is made of the material based on barium cerate doped with samarium and copper of composition BaCe_0.8Sm_0.19Cu_0.1O₃ (BCSCuO), applied to the supporting electrolyte by electrophoretic deposition and baked at a temperature of 1530°C for 5 hours, whereas the thin-film cathode modifying layer is made of a material based on cerium dioxide, doped with samarium and praseodymium of composition Ce_0.8(Sm_0.5Pr_0.5)_0.2O_1.9 (PSDC), applied to the supporting electrolyte by electrophoretic deposition and baked at a temperature 1450°C for 5 hours.

EFFECT: increase in the specific power of a SOFC cell with an SDC-carrying electrolyte due to an increase in the NRC, a decrease in the ohmic and polarization resistance.

1 cl, 3 dwg