Patents by Inventor Pierrick Buvat

Pierrick Buvat 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).

  • Publication number: 20200203742
    Abstract: The invention relates to a method for producing a polymer electrolyte membrane/electrode assembly for a fuel cell comprising the following steps: providing a first reinforcing membrane (14) comprising an opening (14a), a first electrode (12), a second reinforcing membrane (18) comprising an opening (18a), a second electrode (20), and a polymer electrolyte membrane (16), and arranging the first (14) and second (18) reinforcing membranes, the first (12) and second (20) electrodes and the polymer electrolyte membrane (16) so as to obtain a successive stack of the first electrode (12), the first reinforcing membrane (14), the polymer electrolyte membrane (16), the second reinforcing membrane (18) and the second electrode (20).
    Type: Application
    Filed: May 3, 2018
    Publication date: June 25, 2020
    Inventors: Pierrick BUVAT, Stéphane CARRIERE, Jérôme SERRE, Paul NGUYEN
  • Patent number: 10673076
    Abstract: A specific method for preparing platinum particles grafted with proton-conducting polymers and use of these particles as catalysts for oxygen reduction.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: June 2, 2020
    Assignee: COMMISSARIAT À L'ÉNERGIE ATOMOIQUE ET AUX ÉNERGIES ALTERNATIVES
    Inventors: Pierrick Buvat, Janick Bigarré, Christophe Coutanceau, Stève Baranton, Delphine Dru
  • Publication number: 20200091540
    Abstract: The invention relates to an installation (1) for assembling fuel cell membranes comprising: a first station (A1) for storing electrode membranes, a second station (A2) for storing reinforcing membranes, a station for stacking the membranes of the first (A1) and second (A2) storage stations, and a station (P) for pressing and heating a membrane assembly, means for conveying and handling (B1, B2) the membranes of the first (A1) and second (A2) storage stations, stacking of the stacking station and membrane assembly of the pressing and heating station.
    Type: Application
    Filed: May 3, 2018
    Publication date: March 19, 2020
    Inventors: Pierrick BUVAT, Stéphane CARRIERE, Laurent CHAZOT, Jérôme SERRE, Jean-Jacques BOUGY
  • Publication number: 20200091534
    Abstract: The invention relates to a method for manufacturing a polymer electrolyte membrane/fuel cell electrode assembly consisting in assembling a reinforcing membrane with a polymer electrolyte membrane at a temperature higher than a subsequent handling temperature of said assembly thus formed.
    Type: Application
    Filed: May 3, 2018
    Publication date: March 19, 2020
    Inventors: Pierrick BUVAT, Stéphane CARRIERE, Claude BONNIN, Jérôme SERRE, Paul NGUYEN
  • Publication number: 20200071445
    Abstract: Silica particles bonded to polymer chains consisting of at least one polymer comprising at least one fluorinated styrene repeating unit comprising at least one proton-conducting group, optionally in the form of a salt, the bonding between the particles and each of the chains being carried out by an organic spacer group.
    Type: Application
    Filed: January 24, 2018
    Publication date: March 5, 2020
    Inventors: Pierrick Buvat, Janick Bigarré, Julien Cellier, Delphine Dru
  • Publication number: 20200067122
    Abstract: The invention relates to a device for handling membranes for fuel cells comprising a membrane storage station (A2) and means for conveying and handling a membrane from the storage station (A2) to a receiving station, characterized in that the conveying and handling means comprise suction gripping means and in that the membrane storage station (A2) comprises a membrane stack magazine which is guided to move in a given direction on a stationary frame carrying means for damping and returning the magazine (A2) to a predetermined position in the absence of a supporting force exerted on the magazine (A2) in said direction by the suction gripping means.
    Type: Application
    Filed: May 3, 2018
    Publication date: February 27, 2020
    Inventors: Pierrick BUVAT, Stéphane CARRIERE, Laurent CHAZOT, Jérôme SERRE, Jean-Jacques BOUGY
  • Publication number: 20190345301
    Abstract: The invention relates to inorganic particles which are covalently bonded to first polymer chains made up of at least one polymer carrying proton exchange groups, optionally in the form of salts, and bonded to second polymer chains made up of at least one fluorinated polymer that does not carry any proton exchange groups, the second chains being bonded to the particles via organic spacer groups, or the second chains being bonded to first chains via organic spacer groups, or some of the second chains being bonded to the particles via organic spacer groups while the remaining second chains are bonded to first chains via organic spacer groups.
    Type: Application
    Filed: January 24, 2018
    Publication date: November 14, 2019
    Inventors: Pierrick Buvat, Janick Bigarré, Julien Cellier, Cédric Loubat, Quentin Crouzet
  • Patent number: 10418644
    Abstract: A method for manufacturing a composite bipolar plate from a composition including at least one lamellar graphite and at least one thermoplastic polymer. This method includes dry sieving of the composition with a sieve for which the mesh diameter is less than or equal to 1,000 ?m, dry blending of the sieved composition, deposition of the blended composition in a mold, this mold preferably being pre-heated, molding by thermocompression of the blended composition with induction heating of the mold, and removal from the mold of the thermocompressed composition leading to the obtaining of the composite bipolar plate. A composite bipolar plate manufactured by this method, to the use of this composite bipolar plate as well as to a fuel cell including such a composite bipolar plate.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: September 17, 2019
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Pierrick Buvat, Philippe Toneguzzo, Sebastien Dagaz, Brice Page
  • Publication number: 20190177461
    Abstract: A method for preparing particles comprising a material suitable for catalysing oxygen reduction or hydrogen oxidation, the particles being grafted with grafts consisting of at least one specific polymer comprising at least one repeating fluorinated styrene unit bearing at least one proton-conducting group.
    Type: Application
    Filed: August 18, 2017
    Publication date: June 13, 2019
    Inventors: Pierrick Buvat, Janick Bigarre, Delphine Dru
  • Publication number: 20190109329
    Abstract: A specific method for preparing platinum particles grafted with proton-conducting polymers and use of these particles as catalysts for oxygen reduction.
    Type: Application
    Filed: April 3, 2017
    Publication date: April 11, 2019
    Inventors: Pierrick Buvat, Janick Bigarré, Christophe Coutanceau, Stève Baranton, Delphine Dru
  • Publication number: 20190097242
    Abstract: A method for preparing particles comprising a material suitable for catalysing oxygen reduction or hydrogen oxidation, the particles being grafted by grafts consisting of at least one specific polymer comprising at least one repeating styrene unit bearing at least one proton-conducting group.
    Type: Application
    Filed: February 24, 2017
    Publication date: March 28, 2019
    Inventors: Pierrick Buvat, Delphine Dru, Cédric Loubat, Quentin Crouzet
  • Patent number: 10230121
    Abstract: The invention relates to copolymers comprising: at least one recurrent unit of the following formula (I): at least one recurrent unit of the following formula (II): and at least one recurrent unit of the following formula (III): wherein: R1 and R2 represent, independently of each other, an alkylene group; Z1 is a group of formula —PO3R3R4, R3 and R4 representing, independently of each other, a hydrogen atom, an alkyl group or a cation; Z2 is a group of formula —SO2R5, R5 representing an alkyl group or an aryl group; X and Y represent, independently of each other, a halogen atom or a perfluorocarbon group.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: March 12, 2019
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Pierrick Buvat, Janick Bigarre, Julien Souquet-Grumey, Ghislain David, Etienne Labalme, Cédric Loubat, Gilles Boutevin
  • Publication number: 20180301723
    Abstract: The invention relates to a method for controlling the functioning of a fuel cell comprising at least one membrane, comprising the following steps: putting at least two conductive means in contact with two different surface elements of the same first conductive plate, said plate being able to be a distribution plate belonging to a first cell, measurement of one or more electrical voltages between said conductive means electrically connected to an electrical-voltage measurement device.
    Type: Application
    Filed: June 20, 2018
    Publication date: October 18, 2018
    Applicant: Commissariat a L'Energie Atomique et aux Energies Alternatives
    Inventors: Janick BIGARRE, Herve GALIANO, Pierrick BUVAT, Serguei MARTEMIANOV
  • Patent number: 10056627
    Abstract: The invention relates to a method for controlling the functioning of a fuel cell comprising at least one membrane, comprising the following steps: putting at least two conductive means in contact with two different surface elements of the same first conductive plate, said plate being able to be a distribution plate belonging to a first cell, measurement of one or more electrical voltages between said conductive means electrically connected to an electrical-voltage measurement device.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: August 21, 2018
    Assignee: Commissariat à l'énergie atomique et aux énergies alternatives
    Inventors: Janick Bigarre, Herve Galiano, Pierrick Buvat, Serguei Martemianov
  • Patent number: 9905872
    Abstract: The invention relates to a process for preparing a composite material comprising a fluorinated polymeric matrix and a filler consisting in ion exchange inorganic particles comprising a step for in situ synthesis of said particles within the polymeric matrix, said matrix comprising at least one first copolymer comprising at least two types of fluorinated recurrent units, a type of which bears at least one pendant maleic anhydride group.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: February 27, 2018
    Assignees: COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES, INSTITUT NATIONAL DES SCIENCES APPLIQUEES, ARKEMA FRANCE
    Inventors: Jean-François Gerard, Véronique Bounor Legare, Sérigne Seck, Pierrick Buvat, Janick Bigarre, Benoît Blondel, Jérôme Chauveau
  • Publication number: 20170200958
    Abstract: A method for manufacturing a composite bipolar plate from a composition including at least one lamellar graphite and at least one thermoplastic polymer. This method includes dry sieving of the composition with a sieve for which the mesh diameter is less than or equal to 1,000 ?m, dry blending of the sieved composition, deposition of the blended composition in a mold, this mold preferably being pre-heated, molding by thermocompression of the blended composition with induction heating of the mold, and removal from the mold of the thermocompressed composition leading to the obtaining of the composite bipolar plate. A composite bipolar plate manufactured by this method, to the use of this composite bipolar plate as well as to a fuel cell including such a composite bipolar plate.
    Type: Application
    Filed: May 27, 2015
    Publication date: July 13, 2017
    Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Pierrick BUVAT, Philippe TONEGUZZO, Sebastien DAGAZ, Brice PAGE
  • Patent number: 9548508
    Abstract: The invention relates to copolymers comprising a chain of siloxane repeat units of at least two different types, a first type of siloxane repeat unit comprising at least one —OH group on the silicon atom of the siloxane repeat unit and a second type of repeat unit comprising at least one pendant chain on the silicon atom of said repeat unit, this pendant chain consisting of a polymer chain comprising a chain of repeat units carrying at least one group of formula —PO3R1R2 wherein R1 and R2 independently represent a hydrogen atom, an alkyl group or a cation.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: January 17, 2017
    Assignees: Commissariat a l'energie atomique et aux energies alternatives, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Pierrick Buvat, Thomas Boucheteau, Ghislain David, François Ganachaud, Sergei Victorovich Kostjuk
  • Publication number: 20160308230
    Abstract: The invention relates to copolymers comprising: at least one recurrent unit of the following formula (I): at least one recurrent unit of the following formula (II): and at least one recurrent unit of the following formula (III): wherein: R1 and R2 represent, independently of each other, an alkylene group; Z1 is a group of formula —PO3R3R4, R3 and R4 representing, independently of each other, a hydrogen atom, an alkyl group or a cation; Z2 is a group of formula —SO2R5, R5 representing an alkyl group or an aryl group; X and Y represent, independently of each other, a halogen atom or a perfluorocarbon group.
    Type: Application
    Filed: December 11, 2014
    Publication date: October 20, 2016
    Inventors: Pierrick Buvat, Janick Bigarre, Julien Souquet-Grumey, Ghislain David, Etienne Labalme, Cédric Loubat, Gilles Boutevin
  • Patent number: 9446392
    Abstract: The invention relates to a method for preparing particles comprising a material capable of catalyzing the reduction of oxygen or the oxidation of hydrogen, said particles being functionalized by polymers comprising at least one repeating unit bearing at least one proton-conducting group, and said particles being covalently bonded to a carbon material, said method comprising: a step a) of contacting particles, comprising a material capable of catalyzing the reduction of oxygen or the oxidation of hydrogen, with a polymer comprising at least one repeating unit bearing at least one proton-conducting group and comprising at least one portion corresponding to an organic radical of a compound that is an initiator for ATRP polymerization, said radical comprising at least one group capable of being grafted onto the surface of said particles, whereby particles, onto which polymers comprising at least one repeating unit bearing at least one proton-conducting group are grafted, are obtained.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: September 20, 2016
    Assignees: COMMISARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Pierrick Buvat, Anne-Claire Ferrandez, Steve Baranton, Christophe Coutanceau
  • Patent number: 9421531
    Abstract: A method for preparing particles includes a material capable of catalyzing the reduction of oxygen or the oxidation of hydrogen, the particles being functionalized by polymers including at least one repeating unit bearing at least one proton-conducting group, and the particles being covalently bonded to a carbon material. The method includes the following consecutive steps: a) a step of contacting particles, comprising a material capable of catalyzing the reduction of oxygen or the oxidation of hydrogen, with a compound that is an initiator for ATRP polymerization, the compound comprising at least one group capable of being grafted onto the surface of the particles, whereby particles, onto which a radical of the initiator compound is grafted, are obtained; and b) a step of contacting the particles obtained in a) with at least one monomer having at least one proton-conducting group, whereby the polymerization of the monomer from the above-mentioned radicals occurs.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: August 23, 2016
    Assignees: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Pierrick Buvat, Anne-Claire Ferrandez, Steve Baranton, Christophe Coutanceau