Patents by Inventor Stéphane Lascaud

Stéphane Lascaud 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).

  • Patent number: 9136539
    Abstract: 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: Grant
    Filed: November 11, 2009
    Date of Patent: September 15, 2015
    Assignee: Electricite de France
    Inventors: Stephane Lascaud, Philippe Stevens
  • Patent number: 8815442
    Abstract: The invention relates to an electrode comprising (a) an electron collector containing one or more transition metals from the groups 4 to 12 of the Periodic Classification of the Elements, and (b) a material that is electrochemically active, present on the surface of the electron collector in the form of a nano-structured conversion layer containing nano-particles or agglomerates of said nano-particles, wherein the nano-particles have a mean diameter of between 1 and 1000 nm, preferably between 10 and 300 nm, wherein said electrochemically active material contains at least one compound of the transition metal or transition metals present in the electron collector, characterized by the fact that the electrode is a textile formed by metallic wires or fibers. The invention also relates to a half-accumulator and an accumulator containing such a textile electrode.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: August 26, 2014
    Assignee: Electricite de France
    Inventors: Elodie Vidal, Stephane Lascaud
  • Publication number: 20140027291
    Abstract: The invention relates to a lithium-ion accumulator precursor and to a method for producing an accumulator from such a precursor.
    Type: Application
    Filed: September 30, 2013
    Publication date: January 30, 2014
    Applicant: ELECTRICITE DE FRANCE
    Inventors: Elodie Vidal, Stephane Lascaud
  • Publication number: 20140027292
    Abstract: The invention relates to a lithium-ion accumulator precursor and to a method for producing an accumulator from such a precursor.
    Type: Application
    Filed: September 30, 2013
    Publication date: January 30, 2014
    Applicant: ELECTRICITE DE FRANCE
    Inventors: Elodie Vidal, Stephane Lascaud
  • Publication number: 20110065009
    Abstract: 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: Application
    Filed: November 11, 2009
    Publication date: March 17, 2011
    Inventors: Stephane Lascaud, Philippe Stevens
  • Publication number: 20100273049
    Abstract: The invention relates to an electrode comprising (a) an electron collector containing one or more transition metals from the groups 4 to 12 of the Periodic Classification of the Elements, and (b) a material that is electrochemically active, present on the surface of the electron collector in the form of a nano-structured conversion layer containing nano-particles or agglomerates of said nano-particles, wherein the nano-particles have a mean diameter of between 1 and 1000 nm, preferably between 10 and 300 nm, wherein said electrochemically active material contains at least one compound of the transition metal or transition metals present in the electron collector, characterised by the fact that the electrode is a textile formed by metallic wires or fibres. The invention also relates to a half-accumulator and an accumulator containing such a textile electrode.
    Type: Application
    Filed: May 18, 2007
    Publication date: October 28, 2010
    Applicant: Electricite de France
    Inventors: Elodie Vidal, Stephane Lascaud
  • Patent number: 7396614
    Abstract: A lithium and vanadium oxide is described having the formula Li1+xV3O8, wherein 0.1?×?0.25. The oxide has a monoclinic crystalline structure and comprises non-agglomerated grains in the form of monocrystalline pellets having a length L of between 1 and 100 ?m, a width W such that 4<L/W<100, and a thickness t such that 4 L/t<100, with t<W, the elongation axis of the pellets being axis b of the monoclinic cell. The oxide may be prepared by mixing the Li and V precursors, without grinding or compression, heating said mixture to 565° C.-585° C. and de-agglomerating the product obtained. The oxide is suitable for use as an active material for the positive electrode of a lithium battery.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: July 8, 2008
    Assignee: Centre National de la Recherche Scientifique
    Inventors: Séverine Jouanneau, Dominique Guyomard, Annie Le Gal La Salle, Alain Verbaere, Stéphane Lascaud, Nelly Bourgeon, Marc Deschamps
  • Patent number: 7235328
    Abstract: The invention concerns an electrochemical generator element (102) comprising successively a first electrode layer having a polarity (114), a first electrolyte layer (110), a second electrode layer with reverse polarity (108), a second electrolyte layer (112), a second electrode layer with said polarity (116). The electrode layers of said polarity (114, 116) are connected by a parallel connection. It further comprises current collectors (118, 120) connected to the electrode layers with said polarity (114, 116). The thickness of the first electrode layer with said polarity (114) is different from the thickness of said second electrode layer with said polarity (116). The invention is applicable to lithium-polymer storage batteries.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: June 26, 2007
    Assignee: Electricite de France - Service National
    Inventor: Stéphane Lascaud
  • Patent number: 6975094
    Abstract: In a method of charging several electrochemical cells 5, 6, 7 connected in series, by a charger 1 which allows adjusting the voltage and the charging current, the voltage of each cell is detected permanently, and when a first cell reaches a predetermined threshold voltage, an increment of the charging current is applied to several cells 5, 6, 7 and simultaneously a shunt resistor of a current equivalent to the increment in the charging current of the several said cells 5, 6, 7 is connected in parallel to said first cell, and when each of the subsequent cells reaches the threshold voltage, a shunt resistor of a current equal to the increment in charging current of said several cells 5, 6, 7 is also connected in parallel to this cell. The invention is applicable to the use of accumulator systems for powering electric vehicles and thermal vehicles with self-contained electric mode.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: December 13, 2005
    Assignees: Electricite de France-Service National, Schneider Electric Industries S.A.
    Inventors: Stéphane Lascaud, Eric Baudoin, Eric Bettega, Michel Barrault
  • Publication number: 20050191558
    Abstract: The invention concerns an electrochemical lithium cell battery (10; 12; 14) comprising at least one positive electrode (5, 6), at least one liquid electrolyte including at least one lithium salt, and at least one negative electrode (1, 2) Said cell battery (10; 12; 14) is characterized in that it comprises at least one layer (3, 13) of a gelled separator (SG) comprising at least one polymer (PG), capable of being gelled by the liquid electrolyte, which is at least partly gelled by the liquid electrolyte, in contact with the negative electrode (1, 2), and in that it comprises at least a layer (4) of a plasticized separator (SP), including at least one polymer (PP) capable of being plasticized by the liquid electrolyte, at least partly in contact with the separator layer (SG). The invention is particularly applicable to hybrid and/or electric vehicles or portable appliances.
    Type: Application
    Filed: June 16, 2003
    Publication date: September 1, 2005
    Inventors: Lucas Sannier, Sylvie Grugeon, Stephane Lascaud, Jean-Marie Tarascon
  • Publication number: 20050026041
    Abstract: A lithium and vanadium oxide is described having the formula Li1+xV3O8, wherein 0.1?x?0.25. The oxide has a monoclinic crystalline structure and comprises non-agglomerated grains in the form of monocrystalline pellets having a length L of between 1 and 100 ?m, a width I such that 4<L/I<100, and a thickness e such that 4 L/e<100, with e<1, the elongation axis of said pellets being axis b of the monoclinic cell. The oxide may be prepared by mixing the Li and V precursors, without grinding or compression, heating said mixture to 565° C.-585° C. and deagglomerating the product obtained. The oxide is suitable for use as an active material for the positive electrode of a lithium battery.
    Type: Application
    Filed: October 8, 2002
    Publication date: February 3, 2005
    Inventors: Severine Jouanneau, Dominique Guyomard, Annie Le Galla La Salle, Alain Verbaere, Stephane Lascaud, Nelly Bourgeon, Marc Deschamps
  • Publication number: 20030148172
    Abstract: The invention concerns an electrochemical generator element (102) comprising successively a first electrode layer having a polarity (114), a first electrolyte layer (110), a second electrode layer with reverse polarity (108), a second electrolyte layer (112), a second electrode layer with said polarity (116). The electrode layers of said polarity (114, 116) are connected by a parallel connection. It further comprises current collectors (118, 120) connected to the electrode layers with said polarity (114, 116). The thickness of the first electrode layer with said polarity (114) is different from the thickness of said second electrode layer with said polarity (116). The invention is applicable to lithium-polymer storage batteries.
    Type: Application
    Filed: November 26, 2002
    Publication date: August 7, 2003
    Inventor: Stephane Lascaud
  • Publication number: 20030108799
    Abstract: The invention concerns an all-solid-state electrochemical generator (1) comprising a negative electrode (4) capable of supplying a lithium cation, an all-solid-state polymer electrolyte (3) formed with a macromolecular material wherein ionised lithium salt is dissolved and a second positive electrode capable of incorporating a non-ionised species corresponding to said lithium cation. The invention is characterised in that the all-solid-state polymer electrolyte comprises one or several fluorinated polymer(s) and the mass ratio macromolecular material/fluorinated polymer(s) ranges between 6 and 700.
    Type: Application
    Filed: November 6, 2002
    Publication date: June 12, 2003
    Inventors: Stephane Lascaud, Marc Deschamps
  • Patent number: 6335123
    Abstract: A solid polymer electrolyte comprises a matrix formed, at least partially, (a) of crosslinked polymer comprising units derived from ethylene oxide and units derived from ethylene oxide substituted with a reactive radical by substitution, at least part of which participates in a crosslinking bond, and (b) of at least an inonizable alkaline salt chelated in said matrix. In addition, a multilayer electrochemical assembly (1) comprises a positive electrode (2) and a current collector (6) of the negative electrode (3) and optionally of its current collector (5), the electrodes being separated by a solid polymer electrolyte (4), as previously described.
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: January 1, 2002
    Assignee: Electricite de France (Servuce National)
    Inventors: Stéphane Lascaud, Paul Baudry, Philippe Gramain