The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 2015
Filed:
Apr. 20, 2011
Arnaud Morin, Grenoble, FR;
Jean-marc Beraud, Rives, FR;
Jenny Jonquille, Grenoble, FR;
Joel Pauchet, Saint Martin D'Uriage, FR;
Jean-marc Senecot, Morestel, FR;
Arnaud Morin, Grenoble, FR;
Jean-Marc Beraud, Rives, FR;
Jenny Jonquille, Grenoble, FR;
Joel Pauchet, Saint Martin D'Uriage, FR;
Jean-Marc Senecot, Morestel, FR;
Commissariat a l'energie atomique et aux energies alternatives, Paris, FR;
HEXCEL REINFORCEMENTS, Dagneux, FR;
Abstract
A method for producing a diffusion layer of an electrochemical device, including: superimposition of multiple unidirectional webs of carbon filaments, filaments of each web positioned parallel with, and next to, one another; needle punching of the webs, breaking a proportion of the filaments such that broken portions of the filaments are tangled with other filaments of the webs; and cutting a proportion of the multiple unidirectional webs, the carbon filaments forming one electrically conducting outer surface of the diffusion layer. The needle punching is accomplished all the way through the multiple unidirectional webs, and/or through two principal opposite faces of the multiple unidirectional webs, and/or with an impact density against the multiple unidirectional webs of between approximately 100 and 300 impacts/cm.