Patents by Inventor Bruno Dufour

Bruno Dufour 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: 20170011861
    Abstract: The present invention relates to a conductive electrode for a system for the storage of electrical energy (1) having an aqueous electrolyte solution, said electrode comprising a metal current collector (3) and an active material (7), said current collector (3) comprising at least one conductive protective layer (5) which is leaktight to electrolytes and which is placed between said metal current collector (3) and said active material (7), said conductive protective layer (5) comprising: a polymer or copolymer binder comprising at least 50% of vinyl chloride unit, a crosslinked elastomer, at least one agent for crosslinking said crosslinked elastomer, conductive fillers.
    Type: Application
    Filed: January 27, 2014
    Publication date: January 12, 2017
    Applicant: HUTCHINSON
    Inventors: Bruno DUFOUR, Carole BUFFRY, Marie DIEUDONNE, Phillippe SONNTAG
  • Publication number: 20160340476
    Abstract: A process for preparing a polymeric composition for forming a lithium-ion or sodium-ion battery electrode or a supercapacitor electrode or for exhibiting magnetic properties, to such a polymeric composition obtained by means of this process, to a mixture which is a precursor of the composition, obtained by means of a first mixing step of the process, and to this electrode. The process for preparing this composition comprises: a) hot-mixing, via the melt process and without solvent, at least one active material, a binder-forming polymeric phase and a sacrificial polymeric phase so as to obtain a mixture, and b) at least partially eliminating said sacrificial polymeric phase so as to obtain said composition which comprises the active material(s) according to a weight fraction greater than 80%. The sacrificial phase is used in step a) according to a weight fraction in the mixture being greater than or equal to 15%.
    Type: Application
    Filed: February 19, 2014
    Publication date: November 24, 2016
    Inventors: Philippe SONNTAG, David AYME-PERROT, Bruno DUFOUR, Arnaud PREBE, Nicolas GAROIS
  • Patent number: 9484571
    Abstract: The invention relates to a cathode that is usable in a cell of a lithium-ion battery comprising an electrolyte based on a lithium salt and on a non-aqueous solvent, to a process for manufacturing this cathode and to a lithium-ion battery having one or more cells incorporating this cathode. This cathode is based on a polymer composition, obtained by melt processing and without solvent evaporation, that is the product of a hot compounding reaction between an active material and additives including a polymer binder and an electrically conductive filler. According to the invention, the binder is based on at least one crosslinked elastomer and the additives furthermore comprise at least one non-volatile organic compound usable in the electrolyte solvent, the composition advantageously includes the active material in a mass fraction greater than or equal to 90%.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: November 1, 2016
    Assignee: Hutchinson
    Inventors: Baptiste Voillequin, David Ayme-Perrot, Bruno Dufour, Philippe Sonntag
  • Patent number: 9384907
    Abstract: The present invention relates in particular to a conductive electrode for an electrical energy storage system (1) having an aqueous electrolyte solution, said electrode comprising a metallic current collector (3) and an active material (7), said metallic current collector (3) comprising a protective conductive layer (5) placed between said metallic current collector (3) and said active material (7), characterized in that said protective conductive layer (5) comprises: —between 30% and 85% as a proportion by weight of dry matter of a copolymer matrix, —between 70% and 15% as a proportion by weight of dry matter of conductive fillers, in addition to the proportion by weight of dry matter of copolymer in order to achieve a total of 100%.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: July 5, 2016
    Assignee: Hutchinson
    Inventors: Bruno Dufour, David Ayme-Perrot, Marie Dieudonne, Philippe Sonntag
  • Publication number: 20150340684
    Abstract: An anode usable in a cell of a lithium-ion battery comprising an electrolyte based on a lithium salt and a non-aqueous solvent, to a process for manufacturing this anode and to a lithium-ion battery having one or more cells incorporating this anode. This anode is based on a polymer composition, obtained by melt processing and without solvent evaporation, that is the product of a hot compounding reaction between an active material and additives having a polymer binder and an electrically conductive filler. The binder is based on at least one crosslinked elastomer and the additives furthermore include at least one non-volatile organic compound usable in the electrolyte solvent, the composition advantageously includes the active material in a mass fraction greater than or equal to 85%.
    Type: Application
    Filed: July 30, 2015
    Publication date: November 26, 2015
    Inventors: Baptiste Voillequin, David Ayme-Perrot, Bruno Dufour, Philippe Sonntag
  • Patent number: 9194988
    Abstract: A polarizing dye dispersion, a light-polarizing article and a process for making light-polarizing article utilizing the polarizing dye dispersion. The aqueous polarizing dye dispersion comprises, in addition to a polarizing dye material, a non-ionic surfactant material comprising a plurality of surfactant molecules represented by the following general formula (I): wherein: the average of the number n of all the surfactant molecules ranges from 9 to 200; m is 1 or 2; R, identical or different for each surfactant molecule and each occurrence, independently is an alkyl; at least one R on each surfactant molecule is a C6-C12 straight-chain or branched alkyl; and X, identical or different for each surfactant molecule, independently is an H or a C1-C4 alkyl.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: November 24, 2015
    Assignee: Corning Incorporated
    Inventors: Jerome Vivien Davidovits, Bruno Dufour, David Henry
  • Publication number: 20150299508
    Abstract: A non-crosslinked, gelled carbonaceous composition and a pyrolysed composition respectively forming an aqueous polymer gel and the pyrolysate thereof in the form of porous carbon is provided. Also provided is a production method thereof, to a porous carbon electrode formed by the pyrolysed composition, and to a supercapacitor containing the electrodes. The gelled, non-crosslinked composition (G2) is based on a resin created at least partly from polyhydroxybenzene(s) R and formaldehyde(s) F and comprises at least one hydrosoluble cationic polyelectrolyte P. The composition forms a rheofluidifying physical gel. A pyrolysed carbonaceous composition having a carbon monolith, is the product of coating, crosslinking, drying then pyrolysis of the non-crosslinked gelled composition, the carbon monolith being predominantly microporous and able to form a supercapacitor electrode having a thickness of less than 1 mm.
    Type: Application
    Filed: October 8, 2013
    Publication date: October 22, 2015
    Applicant: Hutchinson
    Inventors: Bruno Dufour, Yannick Bureau, Hugo Dorie, Pierre-Axel Parodat, Philippe Sonntag
  • Publication number: 20150280156
    Abstract: The present invention relates to a multilayer conductive transparent electrode comprising: a substrate layer, a conductive layer comprising: at least one optionally substituted polythiophene conductive polymer, and a percolating network of metal nanofilaments, the conductive layer being in direct contact with the substrate layer and the conductive layer also comprising at least one hydrophobic adhesive polymer or adhesive copolymer. The invention also relates to the process for manufacturing such a multilayer conductive transparent electrode.
    Type: Application
    Filed: October 2, 2013
    Publication date: October 1, 2015
    Applicant: HUTCHINSON
    Inventors: Jérémie Jacquemond, Stéphane Roger, Bruno Dufour, Philippe Sonntag
  • Publication number: 20150267400
    Abstract: Provided is a gelled carbon-based composition forming an organic polymeric monolithic gel capable of forming a porous carbon monolith by pyrolysis, a use thereof and a process for preparing this composition. A composition according to the invention is based on a resin derived at least partly from polyhydroxybenzene(s) R and formaldehyde(s) F, has a thermal conductivity of less than or equal to 40 mW·m?1·K?1, and includes at least one water-soluble cationic polyelectrolyte P. A process for preparing this composition comprises: a) polymerization, in an aqueous solvent, of the polyhydroxybenzene(s) and formaldehyde(s), in the presence of at least one cationic polyelectrolyte dissolved in this solvent and of a catalyst, in order to obtain a solution based on the resin, b) gelling of the solution in order to obtain a gel, and c) drying in order to obtain the organic polymeric monolithic gel.
    Type: Application
    Filed: October 8, 2013
    Publication date: September 24, 2015
    Applicant: Hutchinson
    Inventors: Benjamin Swoboda, Bruno Dufour, Philippe Sonntag, Christophe Dominiak
  • Publication number: 20150262730
    Abstract: The present invention relates to a multilayer conductive transparent electrode comprising: a substrate layer (1), a conductive layer (2) comprising at least one optionally substituted polythiophene conductive polymer, and the conductive layer (2) being in direct contact with the substrate layer (1) and the conductive layer (2) also comprising at least one hydrophobic adhesive polymer which has chemical compatibility with the optionally substituted polythiophene conductive polymer, such that said multilayer conductive transparent electrode has a coefficient of haze of less than or equal to 3%. The invention also relates to the process for manufacturing such a multilayer conductive transparent electrode.
    Type: Application
    Filed: October 2, 2013
    Publication date: September 17, 2015
    Inventors: Jérémie Jacquemond, Stéphane Roger, Bruno Dufour, Philippe Sonntag
  • Patent number: 9112200
    Abstract: An anode usable in a cell of a lithium-ion battery comprising an electrolyte based on a lithium salt and a non-aqueous solvent, to a process for manufacturing this anode and to a lithium-ion battery having one or more cells incorporating this anode. This anode is based on a polymer composition, obtained by melt processing and without solvent evaporation, that is the product of a hot compounding reaction between an active material and additives having a polymer binder and an electrically conductive filler. The binder is based on at least one crosslinked elastomer and the additives furthermore include at least one non-volatile organic compound usable in the electrolyte solvent, the composition advantageously includes the active material in a mass fraction greater than or equal to 85%.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: August 18, 2015
    Assignee: Hutchinson
    Inventors: Baptiste Voillequin, David Ayme-Perrot, Bruno Dufour, Philippe Sonntag
  • Publication number: 20140291313
    Abstract: The object of the present invention is a method for preparing an article, the structure of which comprises a substrate in a glass or in a glass-ceramic and an original coating fixed to at least one portion of the surface of said substrate, in a characteristic way, said coating, most particularly proposed with reference to the technical problem of VOC emission when it is brought to high temperature, is generated from at least one loaded polysilsesquioxane resin; said at least one polysilsesquioxane resin not containing any aryl radical in its structure. The object of the present invention is also the article which may be obtained after carrying said method.
    Type: Application
    Filed: May 18, 2011
    Publication date: October 2, 2014
    Inventors: Bruno Dufour, Gaëlle Ferriz, David Henry, Philippe Lehuede
  • Publication number: 20140153158
    Abstract: The present invention relates in particular to a conductive electrode for an electrical energy storage system (1) having an aqueous electrolyte solution, said electrode comprising a metallic current collector (3) and an active material (7), said metallic current collector (3) comprising a protective conductive layer (5) placed between said metallic current collector (3) and said active material (7), characterized in that said protective conductive layer (5) comprises:—between 30% and 85% as a proportion by weight of dry matter of a copolymer matrix,—between 70% and 15% as a proportion by weight of dry matter of conductive fillers, in addition to the proportion by weight of dry matter of copolymer in order to achieve a total of 100%.
    Type: Application
    Filed: July 2, 2012
    Publication date: June 5, 2014
    Applicant: Hutchinson
    Inventors: Bruno Dufour, David Ayme-Perrot, Marie Dieudonne, Philippe Sonntag
  • Publication number: 20130244098
    Abstract: An anode usable in a cell of a lithium-ion battery comprising an electrolyte based on a lithium salt and a non-aqueous solvent, to a process for manufacturing this anode and to a lithium-ion battery having one or more cells incorporating this anode. This anode is based on a polymer composition, obtained by melt processing and without solvent evaporation, that is the product of a hot compounding reaction between an active material and additives having a polymer binder and an electrically conductive filler. The binder is based on at least one crosslinked elastomer and the additives furthermore include at least one non-volatile organic compound usable in the electrolyte solvent, the composition advantageously includes the active material in a mass fraction greater than or equal to 85%.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 19, 2013
    Inventors: Baptiste Voillequin, David Ayme-Perrot, Bruno Dufour, Philippe Sonntag
  • Patent number: 8217188
    Abstract: Described herein are C5-C6 annelated naphthopyrans that possess at least one electron-withdrawing group. The compounds possess desirable properties such as increased fading kinetics. Also described herein are new methods for synthesizing 2H-chromenes annelated at C5-C6. The methods involve less stringent reaction conditions as well as provide increased reaction yields. The methods permit the synthesis of a wide variety of substituted naphthopyrans that can be temperature sensitive, which was not possible with previous synthetic routes.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: July 10, 2012
    Assignee: Corning Incorporated
    Inventors: Suresh Das, Bruno Dufour, Mangalam S Nair, Kokkuvayil V Radhakrishnan
  • Publication number: 20110091692
    Abstract: A method of making a polarizing article having high polarization efficiency, low haze, and no visible micro-cracks. The article is made by applying an aqueous polarizing dye solution to a surface of a substrate. The polarizing dye solution comprises at least one ammonium salt of a polarizing azoic dye, an activator, and at least one of an acid and a non-polarizing azoic dye.
    Type: Application
    Filed: June 27, 2008
    Publication date: April 21, 2011
    Applicant: CORNING INCORPORATED
    Inventors: Jerome Vivien Davidovits, Bruno Dufour
  • Publication number: 20100304019
    Abstract: A method for preparing a polarizing substrate comprising a dye layer in which the substrate is contacted with a first solution having a organic silane at a temperature greater than room temperature.
    Type: Application
    Filed: May 29, 2009
    Publication date: December 2, 2010
    Inventors: Pierre-Jean Baron, Jerome Vivien Davidovits, Bruno Dufour, Frank Duraes, Eric Gesell, Philippe Sinard
  • Publication number: 20100060984
    Abstract: A polarizing dye dispersion, a light-polarizing article and a process for making light-polarizing article utilizing the polarizing dye dispersion. The aqueous polarizing dye dispersion comprises, in addition to a polarizing dye material, a non-ionic surfactant material comprising a plurality of surfactant molecules represented by the following general formula (I): wherein: the average of the number n of all the surfactant molecules ranges from 9 to 200; m is 1 or 2; R, identical or different for each surfactant molecule and each occurrence, independently is an alkyl; at least one R on each surfactant molecule is a C6-C12 straight-chain or branched alkyl; and X, identical or different for each surfactant molecule, independently is an H or a C1-C4 alkyl.
    Type: Application
    Filed: February 26, 2008
    Publication date: March 11, 2010
    Applicant: CORNING INCORPORATED
    Inventors: Jerome Vivien Davidovits, Bruno Dufour, David Henry
  • Publication number: 20100056810
    Abstract: Described herein are C5-C6 annelated naphthopyrans that possess at least one electron-withdrawing group. The compounds possess desirable properties such as increased fading kinetics. Also described herein are new methods for synthesizing 2H-chromenes annelated at C5-C6. The methods involve less stringent reaction conditions as well as provide increased reaction yields. The methods permit the synthesis of a wide variety of substituted naphthopyrans that can be temperature sensitive, which was not possible with previous synthetic routes.
    Type: Application
    Filed: August 4, 2009
    Publication date: March 4, 2010
    Inventors: Suresh Das, Bruno Dufour, Mangalam S Nair, Kokkuvayil V. Radhakrishnan
  • Publication number: 20080160559
    Abstract: Described herein are thermo-responsive blends. Also described herein are articles, substrates, and kits composed of thermo-responsive blends for immobilizing cells or tissue and methods of use thereof.
    Type: Application
    Filed: June 8, 2007
    Publication date: July 3, 2008
    Inventors: Alain R.E. Carre, Bruno Dufour, David Henry, Jean Waku-Nsimba