Patents by Inventor Philippe Stevens
Philippe Stevens has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240105945Abstract: Positive electrodes based on organic active material, including molecules of thianthrene as the active material, substituted at specific positions. The electrodes have electrochemical properties enabling their use in a battery, in particular a recyclable battery. The electrodes thus replace the electrodes based on mineral salts that are conventionally used in batteries.Type: ApplicationFiled: September 1, 2023Publication date: March 28, 2024Applicants: ELECTRICITE DE FRANCE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), UNIVERSITE DE PICARDIE JULES VERNE (UPJV)Inventors: Roberto RUSSO, Philippe STEVENS, Gwenaëlle TOUSSAINT, Matthieu BECUWE
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Patent number: 11575170Abstract: 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.Type: GrantFiled: July 10, 2018Date of Patent: February 7, 2023Assignee: ELECTRICITE DE FRANCEInventors: Philippe Stevens, Gwenaelle Toussaint
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Patent number: 11489159Abstract: 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.Type: GrantFiled: December 5, 2018Date of Patent: November 1, 2022Assignees: ELECTRICITE DE FRANCE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE—CNRSInventors: Philippe Stevens, Gwenaelle Toussaint, Aurelien Louis Habrioux, Clement Aime Comminges, Boniface Kokoh, Ismail Abidat, Teko Wilhelmin Napporn, David Portehault, Emmanuelle Cazayus-Claverie, Olivier Durupthy, Corinne Chaneac
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Patent number: 11398657Abstract: 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.Type: GrantFiled: July 10, 2018Date of Patent: July 26, 2022Assignee: ELECTRICITE DE FRANCEInventors: Philippe Stevens, Gwenaelle Toussaint
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Patent number: 11189840Abstract: 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 SO2N 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.Type: GrantFiled: February 13, 2020Date of Patent: November 30, 2021Assignees: ELECTRICITE DE FRANCE, SOLVAY SAInventors: Philippe Stevens, Gwenaelle Toussaint, Sophie Deshayes, Silvia Rita Petricci, Padmanabhan Srinivasan
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Publication number: 20200313185Abstract: 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.Type: ApplicationFiled: December 5, 2018Publication date: October 1, 2020Inventors: Philippe Stevens, Gwenaelle Toussaint, Aurelien Louis Habrioux, Clement Aime Comminges, Boniface Kokoh, Ismail Abidat, Teko Wilhelmin Napporn, David Portehault, Emmanuelle Cazayus-Claverie, Olivier Durupthy, Corinne Chaneac
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Publication number: 20200220241Abstract: 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.Type: ApplicationFiled: July 10, 2018Publication date: July 9, 2020Inventors: Philippe Stevens, Gwenaelle Toussaint
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Publication number: 20200203716Abstract: Disclosed is a production method for a zinc electrode with in situ formation of calcium zincate crystals. The method includes notably the steps of preparation of a mixture, growth of crystals, slowing of the growth and production of the electrode.Type: ApplicationFiled: December 20, 2019Publication date: June 25, 2020Inventors: Philippe STEVENS, Gwénaëlle TOUSSAINT
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Publication number: 20200185727Abstract: 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 SO2N 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.Type: ApplicationFiled: February 13, 2020Publication date: June 11, 2020Inventors: Philippe Stevens, Gwenaelle Toussaint, Sophie Deshayes, Silvia Rita Petricci, Padmanabhan Srinivasan
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Publication number: 20200168969Abstract: 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.Type: ApplicationFiled: July 10, 2018Publication date: May 28, 2020Inventors: Philippe Stevens, Gwenaelle Toussaint
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Patent number: 10177368Abstract: 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.Type: GrantFiled: December 17, 2014Date of Patent: January 8, 2019Assignees: ELECTRICITE DE FRANCE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE—CNRSInventors: Philippe Stevens, Gwenaelle Toussaint, Laurent Puech, Philippe Vinatier
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Publication number: 20180366737Abstract: 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 SO2N 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.Type: ApplicationFiled: December 9, 2016Publication date: December 20, 2018Inventors: Philippe Stevens, Gwenaelle Toussaint, Sophie Deshayes, Silvia Rita Petricci, Padmanabhan Srinivasan
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Patent number: 10109902Abstract: 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.Type: GrantFiled: November 25, 2013Date of Patent: October 23, 2018Assignee: Electricite de FranceInventors: Philippe Stevens, Gwenaelle Toussaint
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Patent number: 10074877Abstract: 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.Type: GrantFiled: November 25, 2013Date of Patent: September 11, 2018Assignee: Electricite de FranceInventors: Gwenaelle Toussaint, Philippe Stevens
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Patent number: 9972817Abstract: 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.Type: GrantFiled: December 14, 2015Date of Patent: May 15, 2018Assignee: Electricite de FranceInventors: Philippe Stevens, Gwenaelle Toussaint, Gilles Lancel, Christel Laberty-Robert, Damien Bregiroux, Clement Sanchez
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Patent number: 9972874Abstract: 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.Type: GrantFiled: November 21, 2014Date of Patent: May 15, 2018Assignee: Electricite de FranceInventors: Gwenaelle Toussaint, Philippe Stevens, Sophie Deshayes
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Patent number: 9911999Abstract: The invention relates to a method for producing an anion-exchange polymer material having an IPN or semi-IPN structure, said method consisting in: (A) preparing a homogeneous reaction solution containing, in a suitable organic solvent, (a) at least one organic polymer bearing reactive halogen groups, (b) at least one tertiary diamine, (c) at least one monomer comprising an ethylenic unsaturation polymerizable by free radical polymerization, (d) optionally at least one cross-linking agent including at least two ethylenic unsaturations polymerizable by free radical polymerization, and e) at least one free radical polymerization initiator; and (B) heating the prepared solution to a temperature and for a duration that are sufficient to allow both a nucleophilic substitution reaction between components (a) and (b) and a free radical copolymerization reaction of components (c) and optionally (d) initiated by component (e).Type: GrantFiled: September 11, 2015Date of Patent: March 6, 2018Assignees: ELECTRICITE DE FRANCE, UNIVERSITE DE CERGY PONTOISEInventors: Philippe Stevens, Fouad Ghamouss, Odile Fichet, Christian Sarrazin
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Publication number: 20170352856Abstract: 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.Type: ApplicationFiled: December 14, 2015Publication date: December 7, 2017Inventors: Philippe Stevens, Gwenaelle Toussaint, Gilles Lancel, Christel Laberty-Robert, Damien Bregiroux, Clement Sanchez
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Patent number: 9742211Abstract: 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.Type: GrantFiled: July 22, 2015Date of Patent: August 22, 2017Assignee: Electricite de FranceInventors: Philippe Stevens, Julien Lhermenault, Gwenaelle Toussaint
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Publication number: 20170214265Abstract: 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.Type: ApplicationFiled: July 22, 2015Publication date: July 27, 2017Inventors: Philippe Stevens, Julien Lhermenault, Gwenaelle Toussaint