New materials and manufacturing processes for electrode coating

Structured electrode foils as current collectors for Li ion battery cells offer a number of advantages over the conventionally used homogeneous metal foils. A micro structure in the range of several micro meter offers a better adhesion for the active electrode materials. A macro structure consisting of holes in the metal foil enables a by far better penetration of the electrolyte during filling of the battery cell and also a fully homogeneous wetting of the complete electrode area which will realize the full capacity potential of the electrodes with high reproducibility. In the area of super-capacitors several tests to pre-treat the current collectors in order to decrease the contact resistance between them and the active material of the electrodes have also been performed.