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The accuracy and reproducibility of electrochemical tests depend not solely ­depend on the choice of materials but also simple geometric and mechanical parameters. Proper electrode cutting is an often neglected factor. Torn and chipped electrode edges—although invisible to the bare eye—inevitably cause current inhomogeneity and are thus likely to affect experimental results. Life cycle and impedance results are especially prone to such artifacts. Electrodes cut by conventional punching (stamping) with only one punch force show chipped edges and are not plain.

The EL–Cut is a high–precision tool specially designed to punch electrodes from coated Cu and Al foils. In contrast to conventional punching, electrodes being cut (fine blanked) by the EL-Cut are produced by three active forces in tools with a few microns of cutting clearance. The fine blanking process results in electrodes with clean cutting surfaces without torn or chipped edges and almost perfectly flat surfaces.

The punching tool of the EL-Cut is permanently installed and cannot be changed. The EL–Cut is available in different versions, each with a different cutting tool. The diameter of a tool can be between 5 and 40 mm. Various shapes, e.g., squared, are possible.