Commissariat a L'energie Atomique Et Aux Energies Alternatives

Commissariat a L'energie Atomique

L'air Liquide

L'air Liquide,societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude

King Saud University

Alejandro Franco

Sylvie Escribano

Remi Vincent

Nicolas Guillet

Didier Marsacq

Rémi Vincent

Olivier Lemaire

Guillaume Krosnicki

Christel Roux

Christine Nayoze

Benoît Barthe

Sylvain Passot

Laure Guetaz

Nicolas Bardi

Rodrigo Ferreira De Morais

David Loffreda

Philippe Sautet

Christel Faure

A fuel cell includes a proton-exchange membrane, and a cathode and anode fixed on its opposite sides. The anode delimits a flow conduit between a molecular-oxygen inlet area and a water outlet area. The cathode includes a support for catalyst material. The support has first and second materials to which catalyst is fixed, the first material being a graphitized material. The second material has a resistance to corrosion by oxygen that is greater than that of the first material. A quantity of the second material at the inlet area is greater than a quantity of the second material at the water outlet. The cathode comprises a first layer including the first material and a second layer including the second material. A thickness of the second layer decreases between the molecular-oxygen inlet area and the water outlet area.

Fuel cell comprising a proton-exchange membrane, having an increased service life

A method of manufacturing a catalyst for a PtM-based PEMFC, M being a transition metal, including the steps of: depositing PtMnanostructures on a support; annealing the nanostructures; depositing a PtMlayer at the surface of the nanostructures thus formed; and chemically leaching metal M. It also aims at the catalyst obtained with this method.

[object Object]

A method for depolluting and regenerating a catalytic fuel-cell electrode, the reaction of the fuel of the cell and capture of at least one polluting species occurring on the catalytic electrode, comprises: a decrease, at a constant first reference current density, in fuel flow, relative to a nominal fuel flow, for a first length of time, leading to a value for the stoichiometric coefficient of fuel lower than 1, to increase oxidation potential on the catalytic electrode and reach oxidation potential of the polluting species, to eliminate it; a cut-off of current for a cut-off time; an increase in flow above nominal flow, leading to a value of stoichiometric coefficient higher than or equal to 1; and an increase in current density until a second current density chosen by operator and possibly identical to or different from the initial reference current density, is reached.

Method of depollution and regeneration of a fuel cell electrode poisoned by sulfur compounds

The invention concerns an active layer for an electrochemical reactor comprising:&#x2014;a carbon electronic conductor which is not a fullerene as a support; and &#x2014;a catalytic system made up of one or more metals and a fullerene. It also concerns an electrochemical reactor integrating such an active layer.

Electrochemical reactor and active layer integrated into said reactor

A method of using a proton exchange membrane fuel cell, composed of a polymer membrane and electrodes present on either side of the membrane, includes at least one step of reversing the functioning of the cell during use.

Method and device for increasing the service life of a proton exchange membrane fuel cell

An electrode for an electrochemical system, such as a fuel cell, is formed by an active layer including: pores; at least one catalyst; at least one ionomer; and electrically-conductive particles. The catalyst content per pore ranges between 30 and 500 mg/cmwith respect to the pore volume.

Proton-exchange membrane fuel cell electrode structuration

The invention relates to a method for extending the lifetime of a PEMFC fuel cell that includes the step of supplying, at anode, a chemical compound capable of reacting with oxygen, but not originating from the fuel.

Method and device for limiting the ageing of fuel cells with proton exchange membrane

A device for determining the CO concentration in a gas containing hydrogen is provided, including a detection electrode in contact with the gas, and a counter electrode, each being in contact with an electrolyte; a current source to deliver a current with a predetermined intensity between the detection electrode and the counter electrode so as to generate, at the detection electrode, an electric potential fluctuating between two threshold values due to the adsorption and desorption of the CO at the detection electrode; a device for measuring the potential; and a calculating device to determine the CO concentration, connected to the current source and to the device for measuring the potential, for calculating a characteristic parameter of the fluctuations of the potential, and for determining the CO concentration from the calculated characteristic parameter and the intensity of the applied current.

Device for determining carbon monoxide concentration and related method

The fuel cell, generating electric power from oxygen and hydrogen ions and comprising an anode (A), a magnetic cathode, comprising an active layer (),and a proton electrolyte () between the anode and the cathode, comprises a network () of permanent magnets () designed to increase the diffusion of oxygen in the active layer. The centers of the magnets () of the network () of permanent magnets are preferably arranged with a two-dimensional distribution in a plane arranged at the interface between the electrolyte () and the active layer (), the magnets being magnetized in parallel manner along the axis perpendicular to this plane. In this way, all the poles of one polarity (S) are surrounded by the active layer (), all the poles of opposite polarity (N) being surrounded by the electrolyte ().

Growing community of inventors

Eybens, France

Alejandro Franco