Commissariat a L'energie Atomique Et Aux Energies Alternatives

L'air Liquide

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

King Saud University

Olivier Lemaire

Alejandro Franco

Nicolas Guillet

Sylvain Passot

Sylvie Escribano

Benoît Barthe

Nicolas Bardi

Guillaume Krosnicki

Christel Faure

Frédéric Ducros

Zoé Minvielle

Alain Memponteil

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

A method for optimizing fuel feed of a fuel cell stack catalytic electrode, the fuel cell stack containing a cell comprising a proton exchange membrane located between said catalytic electrode and another electrode, operating in superstoichiometric mode, said fuel comprising a carbonyl-containing polluting agent compound reacting on said catalytic electrode, comprises: defining a reference voltage for said cell when fed with a fuel exempt from polluting agent; defining a threshold voltage corresponding to a preset operating voltage of said cell as a percentage of reference voltage; defining a calibration curve for given operating conditions, relating threshold voltage to flow rate of polluting agent and allowing a first parameter of flow rate of polluting agent to be defined; detecting polluting agent to define a second parameter corresponding to content of polluting agent present in said fuel; and determining a maximum stoichiometry coefficient for said fuel stream, depending on said two parameters.

Method for optimizing the feed of fuel comprising a carbonyl-containing compound to the catalytic electrode of a fuel cell stack

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.

Growing community of inventors

Les Abrets, France

Olivier Lemaire