Hutchinson

Centre National De La Recherche Scientifique

Universitè De Montpellier

Hitchinson

Université De Nantes

David Ayme-Perrot

Philippe Sonntag

Bruno Dufour

Baptiste Voillequin

Marie Dieudonne

Arnaud Prebe

Jean-Michel Simon

Nicolas Garois

Laure Monconduit

Jean Le Bideau

Ksenia Astafyeva

Hugo Dorie

Marie Dieudonné

Aurélie Guyomard-Lack

Marc Zimmermann

Yannick Bureau

Philippe Girard

Francoise Morato-Lallemand

Serge Walter

Philippe Antitomaso

Anne-Caroline Pasquier

Julie Courtat

Carole Cerclier

Nela Buchtova

Philippe-Franck Girard

Aurelie Guyomard-Lack

Porous polymeric materials having a very high content of thermally conductive and/or electrically conductive fillers. Process for the preparation of the porous composite material including at least one binder-forming polymeric phase and one or more fillers, this process including the stages of hot mixing, by the molten route, the polymeric phase, the fillers and a sacrificial polymeric phase, so as to obtain a mixture, of shaping the mixture and of removing the sacrificial polymeric phase.

Thermally and/or electrically conductive materials and method for the production thereof

A method for preparing a material having an Sn:Sb intermetallic phase includes at least the steps of mixing chemical elements Sn and Sb, and treating the mixture with microwaves. An electrode is manufactured by using the material having an Sn:Sb intermetallic phase; forming the material in a form of powder; mixing the powder with carbon, a binder and a solvent to form an ink; coating a current collector with the ink; and drying the electrode.

Method for manufacturing an Sn:Sb intermetallic phase

Polymer composition for an electrode, method, and a lithium-ion battery including same are provided. This composition includes an active material having a graphite usable in the anode, an electrically conductive filler and a cross-linked elastomer binder that includes a hydrogenated acrylonitrile butadiene copolymer (HNBR). The binder includes a non-hydrogenated acrylonitrile butadiene copolymer (NBR) and/or a HNBR with an acrylonitrile content that is at least 40% by weight and cross-linked by thermal oxidation. This method includes: a) mixing the active material, the binder in a non-cross-linked state and the electrically conductive filler, to obtain a precursor mixture of the composition, b) depositing the mixture on a metal current collector so that the mixture forms a non-cross-linked film, then c) thermal oxidation of the non-cross-linked film under an atmosphere containing oxygen at a temperature of between 200 and 300&#xb0; C., to obtain the electrode in which the binder is cross-linked.

Anode for a lithium-ion battery cell, production method thereof and battery including same

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: The sacrificial phase is used in step a) according to a weight fraction in the mixture being greater than or equal to 15%.

Process for preparing an electrode composition or composition with magnetic properties, mixture and composition obtained by means of said process and said electrode

The invention relates to a gelled aqueous polymer composition for forming, by means of drying then pyrolysis, a monolithic porous carbon, to a pyrolysed carbonated composition produced by the drying, followed by the pyrolysis, of said gelled composition, to a porous carbon electrode for a supercapacitor comprising said pyrolysed composition, and to methods for producing said respectively gelled and pyrolysed compositions. A gelled composition according to the invention, produced from the polycondensation of polyhydroxybenzene(s) and hexymethylenetetramine, is such that the hexymethylenetetramine comprised therein represents a mass fraction of between 7% and 15% inclusive. Said gelled composition is produced by a) polycondensation in an aqueous solvent of the polyhydroxybenzene(s) and hexymethylenetetramine, followed by b) gelling by heating of said polycondensate.

Gelled aqueous polymer composition, pyrolysed carbonated composition produced therefrom for a supercapacitor electrode, and methods for the production thereof

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%.

Cathode for a cell of a lithium-ion battery, its manufacturing process and the battery incorporating it

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%.

Anode for a cell of a lithium-ion battery, its manufacturing process and the battery incorporating it

A carbonaceous composition usable to constitute a supercapacitor cell electrode, a porous electrode usable to equip such a cell, a process for manufacturing this electrode and one such cell incorporating at least one such electrode, for example in order to equip an electric vehicle. This composition is usable to be in contact with an aqueous ionic electrolyte, is based on a carbonaceous powder and comprises a hydrophilic binder-forming system. The system may include between 3% and 10% by weight a first crosslinked polymer having a number-average molecular weight Mn of greater than 1000 g/mol and having alcohol groups, and between 0.3% and 3% by weight a second polymer of at least one acid and which has a pKa of between 0 and 6 and a number-average molecular weight Mn of greater than 500 g/mol, the first polymer being crosslinked thermally in the presence of the second polymer.

Carbonaceous composition for supercapacitor cell electrode, electrode, process for the manufacture thereof and cell incorporating same

The present invention relates in particular to a conductive electrode for an electrical energy storage system () having an aqueous electrolyte solution, said electrode comprising a metallic current collector () and an active material (), said metallic current collector () comprising a protective conductive layer () placed between said metallic current collector () and said active material (), characterized in that said protective conductive layer () comprises: &#x2014;between 30% and 85% as a proportion by weight of dry matter of a copolymer matrix, &#x2014;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%.

Current-conducting electrode and corresponding manufacturing process

Organic gels of resorcinol-formaldehyde type, carbon-based materials of adjusted porosity derived therefrom by pyrolysis. Such materials may be used, in particular, for the production of electrodes.

Carbon-based materials derived from latex

A subject-matter of the invention is a novel process for the preparation of sulphur-modified monolithic porous carbon-based materials by impregnation with a strong sulphur-based acid, the materials capable of being obtained according to this process and the use of these materials with improved supercapacitance properties to produce electrodes intended for energy storage systems. Electrodes composed of sulphur-modified monolithic porous carbon-based materials according to the invention and lithium batteries and supercapacitors having such electrodes also form part of the invention.

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Huningue, France

David Ayme-Perrot