METHOD OF MAKING CATALYTIC LAYER FOR FUEL CELL Russian patent published in 2009 - IPC H01M4/00 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, particularly to the method of making a catalytic layer for a fuel cell. The method involves dispersion of an alcohol solution of platinum black by passing it through a hollow metallic needle-anode into an electric field between an anode and an annular control electrode which is coaxial with the anode. A potential difference ΔU is applied across the said electrodes. The formed jet of platinum black solution is deposited on the surface of a carrier catalytic layer, placed on a substrate-cathode, at potential difference between the annular control electrode and the cathode ΔU₁. Values ΔU and ΔU₁ are defined by the expression: 1.5·10⁵r^1/2 ln(R/r)≤ΔU≤U_cr, B; ΔU₁≈ΔU(L/R_C)^1/2, V; where r - is the radius of the hole in the needle, m; R - is the radius of the hole in the control electrode, m, L - is the distance between the extractor and the surface of the carrier catalytic layer, m; R_C - is the radius of the spot of catalytic layer on the surface the anode, m; U_cr - is the critical value of potential difference between the control electrode and the anode, V, at which flow changes over to multi-jet mode.

EFFECT: easier formation of catalytic layer on the surface a proton-conducting membrane or graphite paper, as well as possibility of controlling structural parametres of the catalytic layer.

4 cl, 4 dwg