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

Cardiorenal

Yohann Thomas

Joël Pauchet

Maxime Schroder

Arnaud Morin

Marie Heitzmann

Maxime Gougis

Anass Benayad

Sébastien Solan

Jéan-Fréderic Martin

Pascal Mailley

Guilhem Henrion

Thibault Thery-Parriel

Fares Zouaoui

Jean-Frédéric Martin

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 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

A lithium-ion accumulator successively includes a first current collector; a negative electrode in contact with the first current collector; an electrode separator comprising an electrolyte, in contact with the negative electrode; a positive electrode in contact with the electrode separator; and a second current collector in contact with the positive electrode. The second current collector is made of aluminum covalently grafted with at least one phenyl aromatic group C(R), in which formula:

Lithium-ion accumulator

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Grenoble, France

Yohann Thomas