Patents by Inventor Stephane Lascaud
Stephane 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).
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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: 8815442Abstract: 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: GrantFiled: May 18, 2007Date of Patent: August 26, 2014Assignee: Electricite de FranceInventors: Elodie Vidal, Stephane Lascaud
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Publication number: 20140027291Abstract: The invention relates to a lithium-ion accumulator precursor and to a method for producing an accumulator from such a precursor.Type: ApplicationFiled: September 30, 2013Publication date: January 30, 2014Applicant: ELECTRICITE DE FRANCEInventors: Elodie Vidal, Stephane Lascaud
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Publication number: 20140027292Abstract: The invention relates to a lithium-ion accumulator precursor and to a method for producing an accumulator from such a precursor.Type: ApplicationFiled: September 30, 2013Publication date: January 30, 2014Applicant: ELECTRICITE DE FRANCEInventors: Elodie Vidal, Stephane Lascaud
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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: 20100273049Abstract: 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: ApplicationFiled: May 18, 2007Publication date: October 28, 2010Applicant: Electricite de FranceInventors: Elodie Vidal, Stephane Lascaud
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Patent number: 7396614Abstract: 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: GrantFiled: October 8, 2002Date of Patent: July 8, 2008Assignee: Centre National de la Recherche ScientifiqueInventors: Séverine Jouanneau, Dominique Guyomard, Annie Le Gal La Salle, Alain Verbaere, Stéphane Lascaud, Nelly Bourgeon, Marc Deschamps
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Patent number: 7235328Abstract: 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: GrantFiled: February 21, 2001Date of Patent: June 26, 2007Assignee: Electricite de France - Service NationalInventor: Stéphane Lascaud
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Patent number: 6975094Abstract: 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: GrantFiled: June 21, 2000Date of Patent: December 13, 2005Assignees: Electricite de France-Service National, Schneider Electric Industries S.A.Inventors: Stéphane Lascaud, Eric Baudoin, Eric Bettega, Michel Barrault
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Publication number: 20050191558Abstract: 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: ApplicationFiled: June 16, 2003Publication date: September 1, 2005Inventors: Lucas Sannier, Sylvie Grugeon, Stephane Lascaud, Jean-Marie Tarascon
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Publication number: 20050026041Abstract: 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: ApplicationFiled: October 8, 2002Publication date: February 3, 2005Inventors: Severine Jouanneau, Dominique Guyomard, Annie Le Galla La Salle, Alain Verbaere, Stephane Lascaud, Nelly Bourgeon, Marc Deschamps
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Publication number: 20030148172Abstract: 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: ApplicationFiled: November 26, 2002Publication date: August 7, 2003Inventor: Stephane Lascaud
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Publication number: 20030108799Abstract: 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: ApplicationFiled: November 6, 2002Publication date: June 12, 2003Inventors: Stephane Lascaud, Marc Deschamps
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Patent number: 6335123Abstract: 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: GrantFiled: August 16, 1999Date of Patent: January 1, 2002Assignee: Electricite de France (Servuce National)Inventors: Stéphane Lascaud, Paul Baudry, Philippe Gramain