METHOD OF PRODUCING SOFC CATHODE DIFFUSION BARRIER LAYER AND SOFC Russian patent published in 2018 - IPC C23C16/455 C23C16/40 H01M8/12 

FIELD: technological processes.

SUBSTANCE: invention relates to a solid oxide fuel cell (SOFC) and a method for producing a barrier layer of a solid oxide fuel cell resistant to cathode diffusion. Method comprises the steps of depositing a layer of polyvalent doped cerium dioxide by atomic layer deposition onto an electrolyte layer composed of a polyvalent stabilized zirconia of a sintered semi-element. Surface of said electrolyte is exposed to a portion of the vapors from one or more lanthanide first precursors of the general formula Ln(thd)_n, wherein thd is 2,2,6,6-tetramethylheptane-3,5-dionate. Excess unreacted steam from this precursor is removed, a portion of the vapor of the second precursor, which is ozone or water, is delivered to the reaction surface. This sequence of steps is repeated to produce thicker films. Screen printing of the cathode layer based on cobaltites containing lanthanum and strontium or lanthanum, strontium and iron is performed on top of the layers mentioned. Heat the above layers together.

EFFECT: provides a dense diffusion barrier layer resistant to cathode diffusion, which can have a large area, and a solid oxide fuel cell with increased efficiency and durability.

8 cl, 5 dwg, 2 tbl, 2 ex