Patents by Inventor Sébastien Martinet
Sébastien Martinet 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: 12224438Abstract: An electrochemical cell for an accumulator operating according to the principle of forming an alloy with the active material of the negative electrode during the charge process comprising: a negative electrode comprising, as active material, a material alloyable with an element M, M being a metal element; a positive electrode comprising, as active material, a conversion material; an electrolyte comprising at least one salt of M disposed between the negative electrode and the positive electrode.Type: GrantFiled: January 4, 2021Date of Patent: February 11, 2025Assignee: COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVESInventors: Sébastien Martinet, Carole Bourbon
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Patent number: 11618076Abstract: A process for synthesizing a material, includes: (a) providing a plurality of powders including at least one lithiated powder including lithium, at least one TM powder including, for more than 95.0% of its mass, a transition metal chosen from titanium; cobalt, manganese, nickel, niobium, tin, iron and mixtures thereof, and at least one chalcogen powder including, for more than 95.0% of its mass, a chalcogen element chosen from sulfur, selenium, tellurium and mixtures thereof, (b) preparing a particulate mixture by mixing all the powders of the plurality or by mixing one of the powders of the plurality with a milled material obtained by; milling a particulate assembly formed by mixing at least two of the other powders of the plurality, and (c) milling the particulate fixture to form the material.Type: GrantFiled: September 19, 2019Date of Patent: April 4, 2023Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Yagmur Celasun, Jean-Francois Colin, Sebastien Martinet, David Peralta
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Patent number: 11535524Abstract: A material of formula LiaTib(AxS3-x)c wherein A is a metalloid element chosen from selenium, tellurium and mixtures thereof, and the stoichiometric coefficients a, b, c and x are such that 0<x<2.2; 0.4?a?4.5; 0.9?b?1.1; and 0.9?c?1.1.Type: GrantFiled: September 19, 2019Date of Patent: December 27, 2022Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Yagmur Celasun, Jean-Francois Colin, Sebastien Martinet, David Peralta
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Publication number: 20210210781Abstract: An electrochemical cell for an accumulator operating according to the principle of forming an alloy with the active material of the negative electrode during the charge process comprising: a negative electrode comprising, as active material, a material alloyable with an element M, M being a metal element; a positive electrode comprising, as active material, a conversion material; an electrolyte comprising at least one salt of M disposed between the negative electrode and the positive electrode.Type: ApplicationFiled: January 4, 2021Publication date: July 8, 2021Inventors: Sébastien Martinet, Carole Bourbon
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Publication number: 20200087159Abstract: A material of formula LiaTib(AxS3-x)c wherein A is a metalloid element chosen from selenium, tellurium and mixtures thereof, and the stoichiometric coefficients a, b, c and x are such that 0<x<2.2; 0.4?a?4.5; 0.9?b?1.1; and 0.9?c?1.1.Type: ApplicationFiled: September 19, 2019Publication date: March 19, 2020Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Yagmur CELASUN, Jean-Francois COLIN, Sebastien MARTINET, David PERALTA
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Publication number: 20200086389Abstract: Process for synthesizing a material, the process including the steps consisting in: a) providing a plurality of powders including: at least one powder including lithium, at least one powder including, for more than 95.0% of its mass, a transition metal chosen from titanium, cobalt, manganese, nickel, niobium, tin, iron and mixtures thereof, and at least one powder including, for more than 95.0% of its mass, a chalcogen element chosen from sulfur, selenium, tellurium and mixtures thereof, b) preparing a particulate mixture by mixing all the powders of the plurality or by mixing one of the powders of the plurality with a milled material obtained by milling a particulate assembly formed by mixing at least two of the other powders of the plurality, and ?milling the particulate mixture to form the material.Type: ApplicationFiled: September 19, 2019Publication date: March 19, 2020Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Yagmur CELASUN, Jean-Francois COLIN, Sebastien MARTINET, David PERALTA
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Publication number: 20180097220Abstract: The present invention relates to a method for manufacturing a material of olivine crystallographic structure of formula (I) AaZzMmSiO4 in which A is chosen from Li, Na, K and mixtures thereof, Z is chosen from Be, Mg, Ca, Sr, Ba, and mixtures thereof, M is chosen from Fe, Ni, Co, Mn, Cr, and mixtures thereof, a, z and m are the stoichiometric coefficients, respectively, of A, Z and M, and satisfy the following conditions: z>0, m>0, a>0, a+z+m?2, and 2?(4?a?2z)/m<4, said method comprising at least the steps consisting in i. having a material of olivine crystallographic structure of formula (II) ZzMmSiO4, obtained by oxidation of a material of olivine crystallographic structure of formula (III) Zz?MmSiO4, in which Z, M, z and m are as defined above and the stoichiometric index z? is such that z?>z, and ii. electrochemically reducing said material of formula (II) in the presence of a source electrode made of element A under conditions that are suitable for forming the material of formula (I).Type: ApplicationFiled: September 12, 2017Publication date: April 5, 2018Applicant: Commissariat A L'Energie Atomique et aux Energies AlternativesInventors: Guillaume LEFEVRE, Jean-Baptiste DUCROS, Sebastien MARTINET
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Publication number: 20180076456Abstract: The present invention relates to a product constituted totally or partly by a material of olivine crystallographic structure of formula: AaZzMmSiO4 in which A is chosen from lithium (Li), sodium (Na), potassium (K) and mixtures thereof, Z is chosen from beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and mixtures thereof, M is chosen from iron (Fe), nickel (Ni), cobalt (Co), manganese (Mn), chromium (Cr), and mixtures thereof, a, z and m are the stoichiometric coefficients, respectively, of A, Z and M, and satisfy the following conditions: z>0, m>0, a>0, a+z+m?2, and 2?(4?a?2z)/m<4.Type: ApplicationFiled: September 12, 2017Publication date: March 15, 2018Applicant: Commissariat A L'Energie Atomique et aux Energies AlternativesInventors: Guillaume Lefevre, Jean-Baptiste Ducros, Sebastien Martinet
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Publication number: 20160164088Abstract: The invention relates to a lithium battery positive electrode material comprising a powder of over-lithiated lamellar oxide fitting the following formula (I) : wherein: x is comprised in a range from 0.1 to 0.26; a+b+c=1 with the condition that a and b are different from 0; when c is different from 0, M is a transition element other than cobalt, said powder having a specific surface area ranging from 1.8 to 6 m2/g and having a tapped density greater than or equal to 1.6 g/cm3.Type: ApplicationFiled: July 28, 2014Publication date: June 9, 2016Applicant: COMMISSARIAT À L'ENERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVESInventors: David Peralta, Frederic Fabre, Pierre Feydi, Sebastien Martinet, Marlene Rey, Loïc Simonin
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Patent number: 9362059Abstract: An electrochemical generator includes a first electrode covered by a passivation layer having a compound formed by repetition of a pattern of the following formula (7): in which: n is an integer comprised between 1 and 10, preferably between 1 and 4; R1 and R2 are identical or different and chosen independently from the group formed by —CH2—, a cyclic or acyclic, linear or branched alkyl chain; R3 is chosen from the group formed by —CH3, a cyclic or acyclic, linear or branched alkyl chain, and a group of the following formula (8): in which: N is a mono or polycyclic, aromatic hydrocarbonated group chosen from the group formed by phenyl, aryl groups, condensed polyaromatic groups, which may be substituted; R4 is chosen from the group formed by —CH2-, a cyclic or acyclic, linear or branched alkyl chain; and A is identical to or different from A?.Type: GrantFiled: September 19, 2011Date of Patent: June 7, 2016Assignee: COMMISSARIAT À L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Laureline Crepel, Fannie Alloin, Jean-Claude Lepretre, Sebastien Martinet
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Patent number: 9331359Abstract: The invention relates to an electrochemical lithium accumulator comprising at least one first electrochemical cell and at least one second electrochemical cell separated from each other by a current-collecting substrate, which substrate supports on a first face, an electrode of said first electrochemical cell, and on its second face opposite to said first face, an electrode of opposite sign of said second electrochemical cell, each cell comprising a positive electrode and a negative electrode separated by an electrolyte, characterized inter alia in that said current-collecting substrate is in copper or in copper alloy.Type: GrantFiled: June 15, 2011Date of Patent: May 3, 2016Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Celine Barchasz, Marianne Chami, Sebastien Martinet, Sebastien Patoux
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Patent number: 9287558Abstract: The invention relates to lithium-bearing iron phosphate in the form of micrometric mixed aggregates of nanometric particles, to an electrode and cell resulting therefrom and to the method for manufacturing same, which is characterized by a nanomilling step.Type: GrantFiled: December 23, 2013Date of Patent: March 15, 2016Assignee: PRAYONInventors: Sébastien Patoux, Sébastien Martinet, Sébastien Launois, Alain Gourgue, Alain Germeau, Isabelle Willems
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Publication number: 20160072122Abstract: The invention relates to lithium-bearing iron phosphate in the form of micrometric mixed aggregates of nanometric particles, to an electrode and cell resulting therefrom and to the method for manufacturing same, which is characterized by a nanomilling step.Type: ApplicationFiled: November 18, 2015Publication date: March 10, 2016Inventors: Sébastien Patoux, Sébastien Martinet, Sébastien Launois, Alain Gourgue, Alain Germeau, Isabelle Willems
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Patent number: 9257723Abstract: The invention relates to a diazonium aryl salt devoid of hydroxyl functions of the following general formula (1): X?+N?N-A-R1—(OR2)n—O—R4-A?-N?N+X???(1) in which: n is in a range of from 1 to 10, preferably from 1 to 4, X? represents a counter-ion of the diazonium cation selected from the group consisting of halogenides, BF4—, NO3—, HSO4—, PF6—, CH3COO—, N(SO2CF3)2—, CF3SO3—, CH3SO3—, CF3COO—, (CH3O)(H)PO2—, and N(CN)2—; R1, R2 and R4 are identical or different and are independently selected from the group consisting of —CH2—, a cyclic alkyl group, an acyclic alkyl group, a linear alkyl group, and a branched alkyl group; and A and A? are identical or different and independently represent a mono or polycyclic, aromatic hydrocarbonated group chosen from the group formed by phenyl, aryl groups, condensed polyaromatic groups, which may be substituted.Type: GrantFiled: September 19, 2011Date of Patent: February 9, 2016Assignee: COMMISSARIAT À L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Laureline Crepel, Fannie Alloin, Jean-Claude Lepretre, Sebastien Martinet
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Patent number: 9093695Abstract: A lithium-ion storage battery includes LiFePO4 as an active material for a positive electrode, an active material for a negative electrode having a lithium insertion/extraction potential equal to or greater than 0.5 V vs. Li+/Li, and a separating element placed between the positive and negative electrodes. The active material for the negative electrode is a lithiated titanium oxide, a derivative of a lithiated titanium oxide, a non lithiated titanium oxide, a derivative of a non lithiated titanium oxide or a mixture thereof. The separating element is formed from a non-woven fabric comprising cellulose fibers or glass fibers of nanometric and/or micrometric size.Type: GrantFiled: April 1, 2014Date of Patent: July 28, 2015Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Marianne Chami, Sebastien Martinet, Florence Masse
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Publication number: 20150040646Abstract: A method for evaluating sealing of a bipolar structure including a sheet-like substrate forming a current collector, and two electrodes in a form of films arranged on opposite surfaces of the substrate, respectively, the method including: placing the bipolar structure in a cavity to define first and second compartments therein, which are separated by the bipolar structure, a periphery of which is sealingly connected to the cavity; circulating a fluid in the first compartment of the cavity toward the second compartment; and evaluating sealing of the bipolar structure from a measurement of difference in pressure of the fluid in the first and second compartments.Type: ApplicationFiled: September 13, 2012Publication date: February 12, 2015Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENE ALTInventors: Marianne Chami, Sebastien Martinet, Ludovic Rouillon
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Publication number: 20140242465Abstract: A lithium-ion storage battery includes LiFePO4 as an active material for a positive electrode, an active material for a negative electrode having a lithium insertion/extraction potential equal to or greater than 0.5 V vs. Li+/Li, and a separating element placed between the positive and negative electrodes. The active material for the negative electrode is a lithiated titanium oxide, a derivative of a lithiated titanium oxide, a non lithiated titanium oxide, a derivative of a non lithiated titanium oxide or a mixture thereof. The separating element is formed from a non-woven fabric comprising cellulose fibers or glass fibers of nanometric and/or micrometric size.Type: ApplicationFiled: April 1, 2014Publication date: August 28, 2014Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Marianne CHAMI, Sebastien MARTINET, Florence MASSE
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Publication number: 20140186705Abstract: The invention relates to lithium-bearing iron phosphate in the form of micrometric mixed aggregates of nanometric particles, to an electrode and cell resulting therefrom and to the method for manufacturing same, which is characterized by a nanomilling step.Type: ApplicationFiled: December 23, 2013Publication date: July 3, 2014Inventors: Sébastien Patoux, Sébastien Martinet, Sébastien Launois, Alain Gourgue, Alain Germeau, Isabelle Willems
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Patent number: 8703332Abstract: The invention relates to lithium-bearing iron phosphate in the form of micrometric mixed aggregates of nanometric particles, to an electrode and cell resulting therefrom and to the method for manufacturing same, which is characterized by a nanomilling step.Type: GrantFiled: January 28, 2011Date of Patent: April 22, 2014Assignees: Prayon, Commissariat à l'Énergie AtomiqueInventors: Sébastien Patoux, Sébastien Martinet, Sébastien Launois, Alain Gourgue, Alain Germeau, Isabelle Willems
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Patent number: 8679686Abstract: The invention relates to a positive electrode/electrolyte pair for lithium batteries operating at a voltage above 4.2 V versus Li+/Li. The electrolyte of the lithium battery used in the invention includes at least a first additive chosen from optionally substituted, cyclic or acyclic, carboxylic or dicarboxylic anhydrides and carboxylic or dicarboxylic acids, and mixtures thereof, and optionally a second additive which is a lithium salt, the total content of additive(s) being greater than or equal to 0.01% by weight and less than or equal to 30% by weight, relative to the total weight of electrolyte, and the positive electrode is made of a material having a spinel structure. The lithium batteries of the invention are applicable in particular in the field of portable equipment, such as telephones, computers, camcorders, cameras and tooling.Type: GrantFiled: June 11, 2009Date of Patent: March 25, 2014Assignee: Commissariat a l'Energie Atomique et aux Energies AlternativesInventors: Sébastien Patoux, Carole Bourbon, Sébastien Martinet, Carole Pagano, Lucas Sannier