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

Maxime Schroder

Joël Pauchet

Yohann Thomas

Rémi Vincent

Arnaud Morin

Eric Mayousse

Marie Heitzmann

Benoît Chavillon

Anass Benayad

The present invention relates to a gas diffusion layer for a fuel cell, made of a carbon substrate grafted with at least one aromatic group having formula (II): wherein: the asterisk * designates a carbon atom with no hydrogen and no Rgroup, with i=1 to 5, and covalently bonded to the carbon substrate; at least two of the R, R, R, R, and Rgroups are different from a hydrogen atom; at least two of the R, R, R, R, and Rgroups are hydrophobic groups or hydrophilic groups or a hydrophobic group and a hydrophilic group.

Fuel cell gas diffusion layer made up of a carbon substrate grafted with an aromatic grouping

A method of attachment between a metal collector and a carbon felt of a battery includes the steps of impregnation of the pores of the carbon felt with a mixture of metal powder and of a binder, locally performed in at least one predetermined area of the carbon felt; and spot welding between the metal collector and the carbon felt impregnated with the metal powder, performed at the level of said at least one predetermined area.

Method for attachment between a metal collector and a carbon felt of a battery and battery produced by the method

A method of treating a carbon substrate, includes the successive steps of impregnating the carbon substrate with an aqueous solution containing an amorphous fluorinated copolymer of tetrafluoroethylene and of perfluoromethoxy dioxole, drying the carbon substrate at a pressure lower than the atmospheric pressure, and obtaining a carbon substrate impregnated with a fluorinated copolymer. Such a carbon substrate may be used as a gas diffusion layer in a fuel cell.

Method of hydrophobic treatment of a carbon substrate

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Buironfosse, France

Maxime Schroder