Patent ID: 9163317
Filing Date: 2015-10-20
Classification: C25B,H01M,Y02E,Y10T

Abstract:
1. A method for producing a diffusion layer of an electrochemical device, comprising: superimposing a plurality of unidirectional webs of carbon filaments, each of the webs comprising a plurality of continuous carbon filaments positioned next to one another and aligned in a first direction and parallel to one another, needle punching of the superimposed unidirectional webs, breaking a proportion of the continuous carbon filaments such that broken portions of the carbon filaments are tangled with other carbon filaments of the plurality of superimposed unidirectional webs at the first end and the second end, respectively; and cutting of at least a proportion of the plurality of superimposed unidirectional webs, wherein the continuous carbon filaments form at least one electrically conducting outer surface of the diffusion layer,