Current collectors for electrochemical elements

Abstract

A current collector for an electrochemical element is shown, comprising a support structure, wherein a layer comprising a metal is applied to at least one side of the support structure, and wherein the support structure contains at least 5% and at most 30% fibrillated fibers of regenerated cellulose, at least 50% and at most 90% non-fibrillated matrix fibers, and at least 5% and at most 30% of a binder, wherein the non-fibrillated matrix fibers: - have no melting point or, if they have a melting point, it is at least 120°C, - are insoluble in water or, if they are insoluble in water, are insoluble in water at a temperature of 80°C or less, and - have a mean length-weighted length of at least 2.0 mm and at most 8.0 mm and a mean length-weighted thickness of at least 1 µm and at most 16 µm, and wherein the binder is insoluble in water at a temperature of 80°C or less solvesbut not in water with a temperature of 30°C or less.

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