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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Patent number: 9601794Abstract: The invention relates to the use of a ceramic of formula Ba2(1?x)M2xIn2(1?y)M?2yO4+?(OH)?? where M represents at least one metal cation with an oxidation number II or III or a combination thereof, M? represents at least one metal cation with an oxidation number III, IV, V or VI or a combination thereof, 0?x?1, 0?y?1, ??2 and 0 <???2, as solid proton-conducting electrolyte in an electrochemical device, in particular a fuel cell, an electrolytic cell, a membrane separating hydrogen from a gas mixture, or also a hydrogen detector, at an operating temperature of said electrochemical device preferably comprised between 200° C. and 600° C.Type: GrantFiled: August 7, 2014Date of Patent: March 21, 2017Assignees: ELECTRICITE DE FRANCE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE—CNRSInventors: Philippe Stevens, Olivier Joubert, Yves Piffard, Maria Teresa Caldes-Rouillon, Thibaud Delahaye
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Publication number: 20170005324Abstract: 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: ApplicationFiled: December 17, 2014Publication date: January 5, 2017Applicant: Electricite de FranceInventors: Philippe Stevens, Gwenaelle Toussaint, Laurent Puech, Philippe Vinatier
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Publication number: 20160294027Abstract: 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: ApplicationFiled: November 21, 2014Publication date: October 6, 2016Inventors: Gwenaelle Toussaint, Philippe Stevens, Sophie Deshayes
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Patent number: 9461348Abstract: 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.Type: GrantFiled: November 8, 2012Date of Patent: October 4, 2016Assignee: ELECTRICITE DE FRANCEInventors: Philippe Stevens, Gwenaelle Toussaint, Florian Moureaux, Marian Chatenet
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Patent number: 9293757Abstract: 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.Type: GrantFiled: May 15, 2012Date of Patent: March 22, 2016Assignee: ELECTRICITE DE FRANCEInventors: Gwenaelle Toussaint, Philippe Stevens, Bernard Toussaint
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Publication number: 20160049679Abstract: 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: ApplicationFiled: September 11, 2015Publication date: February 18, 2016Applicants: Electricite De France, Universite De Cergy PontoiseInventors: Philippe STEVENS, Fouad GHAMOUSS, Odile FICHET, Christian SARRAZIN
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Patent number: 9236642Abstract: The present invention relates to a precursor of a negative electrode compartment for rechargeable metal-air batteries, comprising a rigid casing (1), at least one solid electrolyte membrane (2), a protective covering (5), completely covering the inside face of the solid electrolyte membrane (2), a metallic current collector (3) applied against the inside face of the protective covering (5), preferably also a block (4) 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 (2), and a flexible electronic conductor (6) 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.Type: GrantFiled: September 22, 2010Date of Patent: January 12, 2016Assignees: ELECTRICITE DE FRANCE, SAFT, INSTITUT POLYTECHNIQUE DE BORDEAUXInventors: Gwenaelle Toussaint, Philippe Stevens, Georges Caillon, Patrick Viaud, Christophe Cantau, Philippe Vinatier
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Electrochemical device having a solid alkaline ion-conducting electrolyte and an aqueous electrolyte
Patent number: 9178221Abstract: 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.Type: GrantFiled: October 21, 2010Date of Patent: November 3, 2015Assignee: Electricite De FranceInventors: Gwenaelle Toussaint, Philippe Stevens -
Publication number: 20150303539Abstract: 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: ApplicationFiled: November 25, 2013Publication date: October 22, 2015Applicant: ELECTRICITE DE FRANCEInventors: Philippe Stevens, Gwenaelle Toussaint
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Publication number: 20150303530Abstract: 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: ApplicationFiled: November 25, 2013Publication date: October 22, 2015Applicant: ELECTRICITE DE FRANCEInventors: Gwenaelle Toussaint, Philippe Stevens
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Patent number: 9136539Abstract: The invention relates to a half-cell including an electrode formed of an electron collector containing one or more transition metals from groups 4 to 12 of the Period Table of the Elements, and of an electrochemically active material present on the surface of the electron collector in the form of a nanostructured conversion film containing nanoparticles having an average diameter of between 1 nm and 1000 nm. The electrochemically active material contains at least one compound of the transition metal or the transition metals present in the electron collector. The invention further includes a continuous film of a lithium-ion conductive, solid electrolyte that is water- and air-impermeable and that is deposited directly onto, covering totally, the surface of the nanostructured active material of the electrode. The continuous film of solid electrolyte having a thickness of between 1 ?m and 50 ?m.Type: GrantFiled: November 11, 2009Date of Patent: September 15, 2015Assignee: Electricite de FranceInventors: Stephane Lascaud, Philippe Stevens
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Patent number: 9136550Abstract: 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: May 4, 2010Date of Patent: September 15, 2015Assignees: Electricite De France, Universite De Cergy PontoiseInventors: Philippe Stevens, Fouad Ghamouss, Odile Fichet, Christian Sarrazin
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Publication number: 20150140453Abstract: 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.Type: ApplicationFiled: November 8, 2012Publication date: May 21, 2015Inventors: Philippe Stevens, Gwenaelle Toussaint, Florian Moureaux, Marian Chatenet
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Publication number: 20150050580Abstract: The invention relates to the use of a ceramic of formula Ba2(1-x)M2xIn2(1-y)M?2yO4+?(OH)?? where M represents at least one metal cation with an oxidation number II or III or a combination thereof, M? represents at least one metal cation with an oxidation number III, IV, V or VI or a combination thereof, 0?x?1, 0?y?1, ??2 and 0<???2, as solid proton-conducting electrolyte in an electrochemical device, in particular a fuel cell, an electrolytic cell, a membrane separating hydrogen from a gas mixture, or also a hydrogen detector, at an operating temperature of said electrochemical device preferably comprised between 200° C. and 600° C.Type: ApplicationFiled: August 7, 2014Publication date: February 19, 2015Inventors: Philippe Stevens, Olivier Joubert, Yves Piffard, Maria Teresa Caldes-Rouillon, Thibaud Delahaye
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Publication number: 20140191727Abstract: The present invention relates to a rechargeable accumulator comprising one or more metal-air cells, each cell comprising a first terminal (1) and a second terminal (2), a metallic negative electrode (3) for metal-air cell, connected to the first terminal (1), a first positive electrode (4) for releasing oxygen, a second positive electrode (5) which is a porous air electrode containing at least one oxygen reducing catalyst, an electrolyte, control means (6) suitable for continuously comparing the voltage measured between the terminal (2) and the terminal (1) with a setpoint value and for dispatching a switching signal to the switching means (7) when the measured voltage becomes smaller than the setpoint value, switching means (7) suitable for receiving a switching signal originating from the control means (6) and for connecting and disconnecting the air electrode (5) of the second terminal (2). The present invention also relates to a method using such an accumulator.Type: ApplicationFiled: May 15, 2012Publication date: July 10, 2014Applicant: ELECTRICITE DE FRANCEInventors: Gwenaelle Toussaint, Philippe Stevens, Bernard Toussaint
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ELECTROCHEMICAL DEVICE HAVING A SOLID ALKALINE ION-CONDUCTING ELECTROLYTE AND AN AQUEOUS ELECTROLYTE
Publication number: 20120183868Abstract: 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.Type: ApplicationFiled: October 21, 2010Publication date: July 19, 2012Applicant: Electricite De FranceInventors: Gwenaelle Toussaint, Philippe Stevens -
Publication number: 20120183880Abstract: The present invention relates to a precursor of a negative electrode compartment for rechargeable metal-air batteries, comprising a rigid casing (1), at least one solid electrolyte membrane (2), a protective covering (5), completely covering the inside face of the solid electrolyte membrane (2), a metallic current collector (3) applied against the inside face of the protective covering (5), preferably also a block (4) 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 (2), and a flexible electronic conductor (6) 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.Type: ApplicationFiled: September 22, 2010Publication date: July 19, 2012Applicants: Electricite De France, INSTITUT POLYTECHNIQUE DE BORDEAUX, SAFTInventors: Gwenaelle Toussaint, Philippe Stevens, Georges Caillon, Patrick Viaud, Christophe Cantau, Philippe Vinatier
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Publication number: 20120058413Abstract: 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: ApplicationFiled: May 4, 2010Publication date: March 8, 2012Applicants: UNIVERSITE DE CERGY PONTOISE, ELECTRICITE DE FRANCEInventors: Philippe Stevens, Fouad Ghamous, Odile Fichet, Christian Sarrazin
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Publication number: 20110065009Abstract: The invention relates to a half-cell including an electrode formed of an electron collector containing one or more transition metals from groups 4 to 12 of the Period Table of the Elements, and of an electrochemically active material present on the surface of the electron collector in the form of a nanostructured conversion film containing nanoparticles having an average diameter of between 1 nm and 1000 nm. The electrochemically active material contains at least one compound of the transition metal or the transition metals present in the electron collector. The invention further includes a continuous film of a lithium-ion conductive, solid electrolyte that is water- and air-impermeable and that is deposited directly onto, covering totally, the surface of the nanostructured active material of the electrode. The continuous film of solid electrolyte having a thickness of between 1 ?m and 50 ?m.Type: ApplicationFiled: November 11, 2009Publication date: March 17, 2011Inventors: Stephane Lascaud, Philippe Stevens
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Publication number: 20100015495Abstract: The invention relates to the use of a ceramic of formula Ba2(1?x)M2xIn2(1?y)M?2yO4+?(OH)?? where M represents at least one metal cation with an oxidation number II or III or a combination thereof, M? represents at least one metal cation with an oxidation number III, IV, V or VI or a combination thereof, 0<x<1, 0<y<1, ?<2 and 0<??<2, as solid proton-conducting electrolyte in an electrochemical device, in particular a fuel cell, an electrolytic cell, a membrane separating hydrogen from a gas mixture, or also a hydrogen detector, at an operating temperature of said electrochemical device preferably comprised between 200° C. and 600° C.Type: ApplicationFiled: October 5, 2007Publication date: January 21, 2010Applicants: Electricite De France, Centre Naional De La RechercheInventors: Philippe Stevens, Olivier Joubert, Yves Piffard, Maria Teresa Caldes-Rouillon, Thibaud Delahaye