SOLID ELECTROLYTE MEMBRANE FOR SOLID OXIDE FUEL CELLS Russian patent published in 2024 - IPC H01M8/1253 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical current sources and specifically to material for an oxygen-conducting solid electrolyte based on stabilized zirconium dioxide used in solid oxide fuel cells. Method of directed crystallisation of the melt in a cold container is used in the manufacture of this electrolyte. High-frequency generator with frequency of 1.76 MHz and power of 200 kW is used as a heating source. Directional crystallisation of the melt is carried out by lowering the crucible relative to the inductor at rate of 10 mm/h. Initial materials used are zirconium oxide powders, scandium and ytterbium with content of basic substance of not less than 99.99% in concentration 88–90 mol.% of ZrO₂, 8–10 mol.% of Sc₂O₃, 1–3 mol.% of Yb₂O₃.

EFFECT: high energy efficiency of the fuel cell at a lower level of degradation of the solid electrolyte material.

1 cl, 1 ex