The invention relates to a method for applying polymer patches, in particular from polymer electrode material, on a carrier substrate, including the following method steps:



a) plasticizing the polymer electrode material to form a melt,
b) feeding the plasticized polymer electrode material via at least one die to a heated, structured roller or to a heated, structured conveyor belt, wherein the roller and/or the conveyor belt have recesses that correspond to the dimensions of the patches to be applied,
c) applying the plasticized polymer electrode material on a carrier substrate by bringing the roller and/or the conveyor belt in contact with a carrier substrate.