Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Denis Tremblay

Rémi Vincent

Remi Vincent

Eric Mayousse

Julien Tard

Benoît Barthe

Sebastien Rosini

Jeremie Salomon

Jérémie Salomon

Sébastien Rosini

Benjamin Amestoy

Jean-Francois Blachot

Jean-François Blachot

Remy Panariello

Bertrand Hladys

A process for manufacturing a flow guide for an electrochemical reactor, including providing a substrate; on a first face of the substrate, printing a layer of electrically conductive ink by applying a shear stress to this layer, the viscosity of the printed ink being comprised between 70 and 500 Pa&#xb7;s for a shear rate of 0.1 s, and the viscosity of the printed ink being comprised between 2.5 and 7 Pa&#xb7;s for a shear rate of 100 s, the layer of ink being printed to form a pattern including ribs delineating flow channels.

Process for manufacturing an electrochemical-reactor flow guide

A fuel cell including: a diaphragm/electrodes assembly including a first electrode forming an anode, and a first reinforcement attached to a surface of the diaphragm and surrounding the first electrode; two bipolar plates, having the diaphragm/electrodes assembly placed therebetween and including at least one flow collector passing therethrough, a first surface of the diaphragm including an active area and a connection area and arranged between the flow collector and the active area; a conductor track rigidly connected to the first surface of the diaphragm and extending between the connection area and one edge of the diaphragm that projects beyond the first reinforcement; and a measurement electrode, positioned on the connection area of the first surface of the diaphragm and making electrical contact with the conductor track.

Fuel cell for detecting a pollutant

The invention relates to a method for manufacturing a membrane/electrode assembly, including the steps of: providing a proton exchange membrane comprising a first electrode and a second electrode; placing a first reinforcement with an overlapping portion vertically adjacent to the periphery of the membrane, and with an extension portion made of a polymer material extending laterally beyond the membrane; placing a second reinforcement with an overlapping portion that is vertically adjacent to the periphery of the membrane, and with an extension portion of said second reinforcement extending laterally beyond the membrane and being vertically adjacent to the extension portion of the first reinforcement; applying a laser beam to the vertically adjacent extension portions such as to define an opening through the extension portions and such as to weld the extension portions.

Method for manufacturing a membrane/electrode assembly comprising reinforcements

A membrane-electrode assembly (MEA) including a membrane and two electrodes, and further at least one layer located at the interface of the membrane and of an electrode. The layer contains a proton conductive polymer which has a glass transition temperature lower than or equal to, advantageously lower than, that of the proton conductive polymer contained in the membrane.

Membrane-electrodes assembly for proton exchange fuel cells (PEMFC), and manufacturing method

A fuel cell stack includes first and second membrane electrode assemblies and a metal bipolar plate interposed between the first and second membrane electrode assemblies. The bipolar plate comprises first and second metal sheets facing the first and second membrane electrode assemblies and is securely fastened by welds. There is a gas diffusion layer interposed and compressed between the first membrane electrode assembly and the bipolar plate. In the absence of compression on the gas diffusion layer, regions of the gas diffusion layer surrounding the welds have a thickness smaller by at least 5 &#x3bc;m relative to the average thickness of the gas diffusion layer. This is done so that the contact pressure of the gas diffusion layer with the bipolar plate in the area of the welds is lower than its average contact pressure with the bipolar plate.

Fuel cell limiting the phenomenon of corrosion

A method for manufacturing a membrane/electrode assembly, including depositing an electrocatalyst ink on one face of a support so as to form an electrode on the support and fixedly attaching the support and the electrode formed on a proton-exchange membrane by adhesion. The method also includes withdrawing a part of the support so as to uncover at least one median part of the formed electrode.

Growing community of inventors

Pommiers-la-Placette, France

Denis Tremblay