Patents by Inventor Cristina Iojoiu
Cristina Iojoiu 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: 11069940Abstract: Ionically conductive materials that can be used in electrochemical generators. A new ionically conductive material usable in an electrochemical generator, for example in separators, solid polymer electrolytes or electrodes, has good mechanical properties and good ionic conductivity and is able to prevent dendritic growth in lithium batteries. The material comprises at least one polymer A, different from B, having an ionic conductivity of between 10?5 and 10?3 S/cm, at least one polymer B having mechanical strength characterised by a storage modulus ?200 MPa and at least one reinforcing filler C.Type: GrantFiled: July 12, 2017Date of Patent: July 20, 2021Assignees: INSTITUT POLYTECHNIQUE DE GRENOBLE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE—CNRSInventors: Jean-Yves Sanchez, Cristina Iojoiu, Yannick Molmeret, Claire Antonelli
-
Patent number: 10826118Abstract: The invention relates to a process for preparing unipolar cation-conducting ionomers from fluoro ionic monomers, to said unipolar cation-conducting ionomers, to the uses thereof, to an electrolytic composition comprising at least one of said unipolar cation-conducting ionomers and to an electrochemical device comprising at least one of said unipolar cation-conducting ionomers, especially as electrolyte.Type: GrantFiled: July 21, 2016Date of Patent: November 3, 2020Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, INSTITUT POLYTECHNIQUE DE GRENOBLEInventors: Cristina Iojoiu, Amadou Thiam, Olesia Danyliv, Régis Mercier, Jean-Yves Sanchez
-
Publication number: 20190229315Abstract: The invention relates to ionically conductive materials that can be used in electrochemical generators. The aim of the invention is to provide a new ionic ally conductive material that can be used in an electrochemical generator, for example in separators, solid polymer electrolytes or electrodes, has good mechanical properties and good ionic conductivity and is able to prevent dendritic growth in lithium batteries. Said material comprises: 1. at least one polymer A, different from B, having an ionic conductivity of between 10?5 and 10?3 S/cm, 2. at least one polymer B having mechanical strength characterised by a storage modulus ?200 MPa, for example of between 200 and 5000 MPa or between 350 and 1500 MPa; and 3. at least one reinforcing filler C. The invention also relates to films based on said type of material and to methods for the synthesis of said films.Type: ApplicationFiled: July 12, 2017Publication date: July 25, 2019Applicants: INSTITUT POLYTECHNIQUE DE GRENOBLE, ENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE - CNRSInventors: Jean-Yves SANCHEZ, Cristina IOJOIU, Yannick MOLMERET, Claire ANTONELLI
-
Publication number: 20180212274Abstract: The invention relates to a process for preparing unipolar cation-conducting ionomers from fluoro ionic monomers, to said unipolar cation-conducting ionomers, to the uses thereof, to an electrolytic composition comprising at least one of said unipolar cation-conducting ionomers and to an electrochemical device comprising at least one of said unipolar cation-conducting ionomers, especially as electrolyte.Type: ApplicationFiled: July 21, 2016Publication date: July 26, 2018Inventors: Cristina IOJOIU, Amadou THIAM, Olesia DANYLIV, Régis MERCIER, Jean-Yves SANCHEZ
-
Patent number: 9331353Abstract: The present invention relates to a membrane that includes a porous polymer material made of a polyimide with interconnected macropores and impregnated with protic ionic liquid conductors (CLIP), as well as to the method for manufacturing same and to the uses thereof. The membranes of the invention fulfill the need for membranes including CLIPs, which have good proton-conducting properties as well as good physical properties, in particular high thermal and mechanical stability, in addition to a wide range of electrochemical stability.Type: GrantFiled: November 29, 2011Date of Patent: May 3, 2016Assignees: Universite De Rouen, Institut Polytechnique De Grenoble, Centre National De La Recherche Scientifique—CNRSInventors: Corinne Chappey, Sema Karademir, Quang Trong Nguyen, Dominique Langevin, Stephane Marais, Regis Mercier, Mathieu Martinez, Cristina Iojoiu, Jean-Ives Sanchez
-
Patent number: 8853448Abstract: The invention relates to a process for preparing aromatic sulfonylimides, to the sulfonylimides obtained, and to the use thereof as salt of an electrolyte. The sulfonylimides correspond to the formula [R—SO2—N—SO2R?]rM (I). R? is an ArZL- group. R? is a perfluoroalkyl group or an ArZL- group. Z is an S, SO or SO2 group. L is a —(CF2)n—CFRf— group. n is 0 or 1; Rf represents F or a C1 to C8 perfluoroalkyl group; Ar is an aromatic group. M represents H, an alkali metal cation, an alkaline earth metal cation, a trivalent or tetravalent metal cation, or an organic cation. The process consists in preparing a compound RSO2N(R?)SO2R? from RSO2F, and in replacing the group R? by nucleophilic substitution reaction so as to obtain the compound (I), R? being a benzyl or trimethylsilyl group.Type: GrantFiled: July 17, 2007Date of Patent: October 7, 2014Assignees: Institut National Polytechnique de Grenoble, Eras-Labo, Universite Claude Bernard LyonInventors: Jean-Yves Sanchez, Bernard Langlois, Maurice Medebielle, Fabien Toulgoat, Fannie Alloin, Elie Paillard, Cristina Iojoiu
-
Publication number: 20140199613Abstract: The present invention relates to a membrane that includes a porous polymer material made of a polyimide with interconnected macropores and impregnated with protic ionic liquid conductors (CLIP), as well as to the method for manufacturing same and to the uses thereof. The membranes of the invention fulfil the need for membranes including CLIPs, which have good proton-conducting properties as well as good physical properties, in particular high thermal and mechanical stability, in addition to a wide range of electrochemical stability.Type: ApplicationFiled: November 29, 2011Publication date: July 17, 2014Applicants: UNIVERSITE DE ROUEN, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE-CNRS, INSTITUT POLYTECHNIQUE DE GRENOBLEInventors: Corinne Chappey, Sema Karademir, Quang Trong Nguyen, Dominique Langevin, Stephane Marais, Regis Mercier, Mathieu Martinez, Cristina Iojoiu, Jean-Ives Sanchez
-
Patent number: 8376149Abstract: The invention relates to the preparation of a crosslinked polymeric film bearing ionic groupings. The process consists in extruding a material comprising at least one prepolymer, in polymerizing said material after extrusion, and in subjecting the extruded material to a chemical reaction for grafting ionic groupings. The prepolymer comprises repeating units each comprising at least one aromatic group GA and at least one functional group GF; it bears at least one group GP which is polymerizable thermally at a temperature greater than the extrusion temperature, or photochemically, and also at least one reactive group GR which allows the grafting of ionic groupings. The films are useful as a membrane for fuel cells or electrodialysis, as an electrolyte of a lithium battery, of a supercapacitor or of an electrochromic device, or as an ion exchange membrane.Type: GrantFiled: November 21, 2006Date of Patent: February 19, 2013Assignee: Solvay SAInventors: Jean-Yves Sanchez, Crístina Iojoiu, Régis Mercier, Nadia El Kissi, France Chabert, Jérèmie Salomon
-
Patent number: 8216487Abstract: The invention relates to a copolymer of ethylene oxide or propylene oxide and at least one substituted oxirane bearing an ionic group. The copolymer is characterized in that its chain comprises repeat units —O—CH2—CH(—CH2—O—SO3?Li+)—, repeat units —O—CH2—CHR— in which R is H or CH3, optionally, repeat units —O—CH2—CH(—CH2R?)— in which R? is a functional group. x Uses: electrolyte in electrochemical, selective-membrane and reference-membrane devices.Type: GrantFiled: February 9, 2006Date of Patent: July 10, 2012Assignee: BatscapInventors: Jean-Yves Sanchez, Marc Deschamps, Fannie Alloin, Christophe Chauvin, Cristina Iojoiu
-
Patent number: 7973089Abstract: The invention relates to a process for the extrusion of thermoplastic polymers having alkaline ionic groups. The process consists in preparing a mixture composed of a thermoplastic polymer having alkaline ionic groups and a plasticizer, in extruding the mixture obtained to form a film; then in washing the film obtained in aqueous medium to remove said plasticizer(s). The plasticizer is chosen from non-volatile compounds which are stable with respect to the ionic groups of the polymer, which are soluble in water or in solvents that are miscible with water, said plasticizers being chosen from the compounds that react with the ionic group of the polymer via formation of a weak bond of the hydrogen bond-type, and the compounds that react with the ionic group of the polymer via formation of a strong bond, of the ionic bond-type.Type: GrantFiled: March 9, 2006Date of Patent: July 5, 2011Assignees: Institut National Polytechnique de Grenoble, Eras-Labo, Commissariat a l'Energie Atomique, Centre National de la Recherche ScientifiqueInventors: Jean-Yves Sanchez, Cristina Iojoiu, Regis Mercier, Manuel Marechal, Nadia El Kissi, Herve Galiano, France Chabert
-
Patent number: 7956095Abstract: The invention relates to a process for the extrusion of thermoplastic polymers having acid ionic groups. The process consists in preparing a mixture composed of a thermoplastic polymer having acid ionic groups and a plasticizer, in extruding the mixture obtained to form a film, then in washing the film obtained in aqueous medium to remove said plasticizer(s). The plasticizer is chosen from non-volatile compounds which are stable with respect to the ionic groups of the polymer, which are soluble in water or in solvents that are miscible with water, said plasticizers being chosen from the compounds that react with the ionic group of the polymer via formation of a weak bond of the hydrogen bond-type, and the compounds that react with the ionic group of the polymer via formation of a strong bond, of the ionic bond-type.Type: GrantFiled: March 9, 2006Date of Patent: June 7, 2011Assignees: Institut National Polytechnique de Grenoble, Eras-Labo, Commissariat a l'Energie Atomique, Centre National de la Recherche ScientifiqueInventors: Jean-Yves Sanchez, Cristina Iojoiu, Yves Piffard, Nadia El Kissi, France Chabert
-
Publication number: 20100174113Abstract: The invention relates to a process for preparing aromatic sulphonylimides, to the sulphonylimides obtained, and to the use thereof as salt of an electrolyte. The sulphonylimides correspond to the formula [R—SO2—N—SO2R?]rM (I). R? is an ArZL- group. R? is a perfluoroalkyl group or an ArZL- group. Z is an S, SO or SO2 group. L is a —(CF2)n—CFRf— group. n is 0 or 1; Rf represents F or a C1 to C8 perfluoroalkyl group; Ar is an aromatic group. M represents H, an alkali metal cation, an alkaline earth metal cation, a trivalent or tetravalent metal cation, or an organic cation. The process consists in preparing a compound RSO2N(R?)SO2R? from RSO2F, and in replacing the group R? by nucleophilic substitution reaction so as to obtain the compound (I), R? being a benzyl or trimethylsilyl group.Type: ApplicationFiled: July 17, 2007Publication date: July 8, 2010Applicants: INSTITUT NATIONAL POLYTECHNIQUE DE GRENOBLE, ERAS-LABO, UNIVERSITE CLAUDE BERNARD LYON 1Inventors: Jean-Yves Sanchez, Bernard Langlois, Maurice Medebielle, Fabien Toulgoat, Fannie Alloin, Elie Paillard, Cristina Iojoiu
-
Publication number: 20090203805Abstract: The invention relates to a process for the extrusion of thermoplastic polymers having alkaline ionic groups. The process consists in preparing a mixture composed of a thermoplastic polymer having alkaline ionic groups and a plasticizer, in extruding the mixture obtained to form a film; then in washing the film obtained in aqueous medium to remove said plasticizer(s). The plasticizer is chosen from non-volatile compounds which are stable with respect to the ionic groups of the polymer, which are soluble in water or in solvents that are miscible with water, said plasticizers being chosen from the compounds that react with the ionic group of the polymer via formation of a weak bond of the hydrogen bond-type, and the compounds that react with the ionic group of the polymer via formation of a strong bond, of the ionic bond-type.Type: ApplicationFiled: March 9, 2006Publication date: August 13, 2009Inventors: Jean-Yves Sanchez, Cristina Iojoiu, Regis Mercier, Manuel Marechal, Nadia El Kissi, Herve Galiano, France Chabert
-
Publication number: 20090176161Abstract: The invention relates to a copolymer of ethylene oxide or propylene oxide and at least one substituted oxirane bearing an ionic group. The copolymer is characterized in that its chain comprises repeat units —O—CH2—CH(—CH2—O—SO3?Li+)—, repeat units —O—CH2—CHR— in which R is H or CH3, optionally, repeat units —O—CH2—CH(—CH2R?)— in which R? is a functional group.× Uses: electrolyte in electrochemical, selective-membrane and reference-membrane devices.Type: ApplicationFiled: February 9, 2006Publication date: July 9, 2009Inventors: Jean-Yves Sanchez, Marc Deschamps, Fannie Alloin, Christophe Chauvin, Cristina Iojoiu
-
Publication number: 20080290022Abstract: The invention relates to the preparation of a crosslinked polymeric film bearing ionic groupings. The process consists in extruding a material comprising at least one prepolymer, in polymerizing said material after extrusion, and in subjecting the extruded material to a chemical reaction for grafting ionic groupings. The prepolymer comprises repeating units each comprising at least one aromatic group GA and at least one functional group GF; it bears at least one group GP which is polymerizable thermally at a temperature greater than the extrusion temperature, or photochemically, and also at least one reactive group GR which allows the grafting of ionic groupings. The films are useful as a membrane for fuel cells or electrodialysis, as an electrolyte of a lithium battery, of a supercapacitor or of an electrochromic device, or as an ion exchange membrane.Type: ApplicationFiled: November 21, 2006Publication date: November 27, 2008Inventors: Jean-Yves Sanchez, Cristina Iojoiu, Regis Mercier, Nadia El Kissi, France Chabert, Jeremie Salomon