Electricite De France

Centre National De La Recherche Scientifique

Solvay Sa

Saft

Institut Polytechnique De Bordeaux

Gwenaelle Toussaint

Philippe Stevens

Sophie Deshayes

Philippe Vinatier

Clement Sanchez

Padmanabhan Srinivasan

Georges Caillon

Patrick Viaud

David Portehault

Christel Laberty-Robert

Corinne Chaneac

Gilles Lancel

Marian Julien Chatenet

Marian Chatenet

Christophe Cantau

Clement Aime Comminges

Boniface Kokoh

Ismail Abidat

Aurelien Louis Habrioux

Damien Bregiroux

Julien Lhermenault

Teko Wilhelmin Napporn

Emmanuelle Cazayus-Claverie

Olivier Durupthy

Florian Moureaux

Silvia Rita Petricci

Laurent Puech

Bernard Toussaint

A method for managing the electrical energy passing through a metal-air battery comprising a cell and the associated cell comprising a negative electrode, a first positive electrode referred to as the air electrode, and a second positive electrode referred to as the power electrode. The cell further comprises a third positive electrode. In a first charging phase, a charging voltage is applied to the cell, this voltage causing current to travel between the negative electrode and the second positive electrode, the first and third positive electrodes being electrically inactive. In a second charging phase, the charging voltage causes current to travel between the negative electrode and said third positive electrode, the first and second positive electrode being electrically inactive.

Method for managing the electrical energy passing through a metal-air battery and associated cell

A method for producing a graphene oxide-based compound for an air electrode of a metal-air battery. A nitrogen and sulfur-based organic compound is added to an aqueous suspension of a graphene oxide. The water of the suspension is evaporated in order to obtain a powder. This powder is heated under an inert atmosphere in order to sublime the organic compound and stimulate the incorporation of nitrogen from the organic compound into the graphitic sites of the graphene oxide. The nitrogen and sulfur-doped graphene oxide is added to a second aqueous suspension comprising a cobalt nitrate-based compound. This second suspension is heated in order to form nanoparticles of cobalt oxide at the surface of at least one nitrogen and sulfur-doped graphene oxide sheet.

Method for producing a graphene oxide-based compound for an air electrode of a metal-air battery and associated compound

A method for managing the electric power passing through a cell of a metal-air battery and the associated cell. The cell comprises a negative electrode connected to a positive terminal of the battery, two positive electrodes, and a switching means. The switching means is maintained in a configuration connecting the positive terminal to the first positive electrode when an electric power to pass through the battery corresponds to a first power range, and in a configuration connecting the positive terminal to the second positive electrode when an electric power to pass through the battery corresponds to a second power range, the second power range being associated with higher electric powers than the electric powers of the first range.

Method for managing the electric power passing through a metal-air battery cell and associated cell

A method for manufacturing a composite electrode for a metal-air electrochemical cell with a liquid electrolyte of basic pH. A liquid solution comprising a fluoropolymer suspended in a solvent is synthesized, then deposited on the outer surface of a porous structure forming an air electrode. The fluoropolymer comprises SON groups suitable for conducting hydroxyl ions and is capable of forming a membrane impermeable to at least the liquid electrolyte of basic pH. When the liquid solution is applied to the porous structure, the solvent flows through the porous structure and the fluoropolymer is deposited by aggregating into a layer on the outer surface of the porous structure.

Composite air electrode and associated manufacturing method

An anode compartment for rechargeable lithium or sodium batteries, including: a solid electrolyte; a collector deposited on the solid electrolyte; and an active material made of lithium metal or sodium metal which has been grown between the solid electrolyte and the collector in order to form an electrode made of lithium metal or sodium metal with the collector, in which the collector is made of an amorphous alloy. A method for manufacturing such an anode compartment and a battery including said anode compartment is also presented.

Anode compartment with a collector made of amorphous-alloy

A method for storing and releasing power using a metal-air battery, which includes: (a) a discharge phase during which a first positive air electrode is connected to the positive terminal of the battery and a second positive oxygen-release electrode is disconnected from the positive terminal of the battery; (b) a recharging phase during which the second positive oxygen-release electrode is connected to the positive terminal of the battery and the first positive air electrode is disconnected from the positive terminal of the battery, and during which the potential of the negative electrode is measured relative to the first positive air electrode. Also disclosed is a metal-air battery designed especially for implementing said method.

Metal-air battery having a device for controlling the potential of the negative electrode

A method for charging a zinc-air battery, wherein the potential of the negative electrode during the charging is lower than, or equal to, the value of a critical charging potential. Also disclosed is a method for storing and restoring electrical energy, comprising such a charging step, and to a zinc-air battery suitable for implementing said charging method, and a discharging phase.

Method for charging a zinc-air battery with limited potential

A rechargeable battery including a casing containing therein: an air electrode; a negative electrode; and an electrolyte, in which the air electrode can be taken out of the casing. The rechargeable battery also relates to a cathode compartment for an air electrode battery, where the compartment includes an air electrode and is insertable into a casing of the battery without being part of the casing, and the compartment is removably movable.

Battery with extractible air electrode

A method for producing a waterproof and ion-conducting flexible membrane intended for protecting a metal electrode. It comprises a synthesis by electrically assisted extrusion of compact fibers forming an ion-conducting fiber array comprising a first material. The fiber array defines a first surface and a second surface opposite the first surface. Subsequently, the fiber array is impregnated with a polymer of a second material, to form a metal electrode protection membrane. The fiber array forms paths for conducting ions between the first surface and the second surface and through the second material. The first surface is intended to be in contact with the metal electrode.

Method for producing a waterproof and ion-conducting flexible membrane

A method for managing the charge of a metal-air battery comprising at least one cell. The cell comprises a negative electrode, a first positive air electrode and a second positive oxygen-release electrode. For each cell, during the application of a charge current circulating in the cell between the negative electrode and the second positive oxygen-release electrode, the absolute value of a potential of the negative electrode is compared with a critical threshold value, the potential of the negative electrode being determined relative to the first positive air electrode. When the absolute value of the potential of the negative electrode reaches the threshold value, a surplus charging current, depending on the difference between the current applied to the cell and the charging current, is diverted.

Charge control of a metal-air battery

The present invention relates to an electrochemical device, in particular a lithium-air battery with an aqueous electrolyte, comprising: a negative electrode compartment containing lithium metal; a positive electrode compartment comprising at least one positive air electrode making contact with an aqueous solution containing lithium hydroxide; and a solid electrode separating, in a gas and fluidtight manner, the negative electrode compartment from the positive electrode compartment, characterized in that the aqueous solution containing the lithium hydroxide furthermore contains at least one additive decreasing the solubility of the lithium ions. The invention also relates to a method for storing and releasing electrical energy using a lithium-air battery according to the invention.

Aqueous electrolyte for lithium-air battery

The present invention relates to a rechargeable accumulator comprising one or more metal-air cells, each cell comprising a metallic negative electrode, a first positive electrode for releasing oxygen, a second positive electrode which is a porous air electrode containing at least one oxygen reducing catalyst, and an automatic device for protecting the air electrode during the charging and discharging phases of the accumulator. The invention also relates to a method for storing and releasing electrical energy using such an accumulator.

Metal-air accumulator with air electrode protection device

The present invention relates to a precursor of a negative electrode compartment for rechargeable metal-air batteries, comprising a rigid casing (), at least one solid electrolyte membrane (), a protective covering (), completely covering the inside face of the solid electrolyte membrane (), a metallic current collector () applied against the inside face of the protective covering (), preferably also a block () of elastic material applied against the current collector and essentially filling the entire internal space defined by the walls of the rigid casing and the solid electrolyte (), and a flexible electronic conductor () passing in a sealed manner through one of the walls of the rigid casing. The present invention also relates to a negative electrode compartment having a rigid casing obtained from said precursor and to a battery containing such a negative electrode compartment.

Rigid negative compartment for a metal-air battery and method of manufacturing said compartment

The present invention relates to an alkaline cation-conducting ceramic membrane covered, over at least a portion of the surface thereof, with a cation-conducting organic polyelectrolyte layer that is insoluble and chemically stable in pH-basic water. The invention also relates to an electrochemical device including such a membrane as a solid electrolyte in contact with a liquid electrolyte formed of an alkali metal hydroxide aqueous solution.

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Nemours, France

Gwenaelle Toussaint