Apparatus for coating current collectors

An apparatus for continuously coating a liquid adhesive promoter composition onto a lower surface of a web of current collector material which comprises:

• a source of the web of current collector material;
• a reservoir containing a liquid composition that comprises a solvent, an electrically conductive solid material, and an adhesive polymer, wherein the weight ratio of the electrically conductive solid material to the adhesive polymer ranges from about 1 to 9 to 4 to 6;
• a first rotatable roller having an exterior surface that is at least partially submerged in the liquid composition whereby liquid composition adheres to the exterior surface of the first rotatable roller that comes into contact with the liquid composition;
• and
• a second rotatable roller that is positioned adjacent to and above the first rotatable roller and wherein an exterior surface of the second rotatable roller and an exterior surface of the first rotatable roller defines a nip through which the web of current collector material traverses.