Arkema France

Atofina

Hydro-quebec

Alexander Korzhenko

Christophe Vincendeau

Patrick Delprat

Andriy Tymoshenko

Catherine Bluteau

Jean-Marc Suau

David Platel

Dmitry Zakharov

Grigoriy Nikolayevich Pervushin

Grigory Ivanovich Yakovlev

Anna Lushnikova

Karim Zaghib

Abdelbast Guerfi

Benoît Brule

Alain Bouilloux

Dominique Plee

Serge Nicolas

Patrice Gaillard

Martin Dontigny

Thierry Aubert

Stephane Girois

Sebastien Quinebeche

Beni Cahana

Naoyuki Kondo

Ali Darwiche

Julien Beausoleil

Emmanuel Rastelletti

R G Sharpe-Hill

Galina Shapoval

Alexander Pud

Anatolly Goryachkin

Patrick Piccione

Mickael Havel

Anatoliy Goryachkin

Dimitry Zakharov

Anatolly Goryashkin

Tatiana Kolomiets

Célia Mercader

Amélie Merceron

The present invention relates to a composition for battery electrodes in which at least one solvent is a composition comprising between 80% and 95% by mass of N-methylpyrrolidone (NMP).

Composition for battery electrodes

The present invention proposes a process for purifying raw carbon nanotubes to obtain an content in metallic impurities comprised between 5 ppm and 200 ppm. The process includes an increase in the bulk density of the raw carbon nanotubes via compacting to produce compacted carbon nanotubes. The process further includes sintering the compacted carbon nanotubes by undergoing thermal treatment under gaseous atmosphere in order to remove at least a portion of the metallic impurities contained in the raw carbon nanotubes, and consequently producing purified carbon nanotubes. These purified carbon nanotubes are directly usable as electronic conductors serving as basis additive to an electrode material without requiring any subsequent purification step. The electrode material can then be used to manufacture an electrode destined to a lithium-ion battery.

Method for the purification of raw carbon nanotubes

A process for the production of highly carbonaceous material, including combining a structured precursor including fibres and an unstructured precursor, in the form of a fluid, wherein the fluid has a viscosity of less than 45,000 mPa&#xb7;sat the temperature at which the combination step occurs, and including at least a cyclic organic or aromatic compound in the molten state, or in solution at a concentration by weight of less than or equal to 65%, in order to obtain a combined precursor corresponding to the structured precursor covered by the unstructured precursor, wherein the process further includes step of thermal and dimensional stabilization of the combined precursor in order to obtain fibres covered with a cyclic organic or aromatic compound deposit, and a step of carbonization of the fibres covered with a cyclic organic or aromatic compound deposit in order to obtain a highly carbonaceous material.

Process for producing highly carbonaceous materials and the highly carbonaceous material obtained

A process for producing a highly carbonaceous fibre or set of fibres including combining a structured precursor comprising a hydrocellulose fibre or a set of fibres, and an unstructured precursor, including lignin or a lignin derivative in the form of a solution having a viscosity less than 15,000 mPa&#xb7;sat the temperature at which the combination step takes place, in order to obtain a hydrocellulose fibre or set of fibres coated with the lignin or lignin derivative, wherein the process further includes a step of thermal and dimensional stabilization of the hydrocellulose fibre or set of fibres covered with the lignin in order to obtain a hydrocellulose fibre or set of fibres covered with a deposit of lignin or lignin derivative, and a carbonization step of the hydrocellulose fibre or set of fibres coated with a lignin deposit in order to obtain a highly carbonaceous fibre or set of fibres.

Process for producing carbon fibres from biosourced precursors and the carbon fibres obtained

The invention relates to a method for producing a master batch comprising between 0.01 and 50 wt. % of carbonaceous nanofillers and at least one sulphurated material such as elemental sulphur by melt compounding, and to the master batch thus produced and the different uses thereof. The invention also relates to a solid composition comprising carbonaceous nanofillers dispersed in a sulphurated material.

Production of a master batch based on sulphur and carbonaceous nanofillers, the master batch produced, and uses thereof

The present invention relates to an active material suitable for the production of an electrode, in particular an electrode for a Li&#x2014;S battery. The active material according to the invention comprises carbon nanofillers homogeneously dispersed in the substance of a sulphur material, the active material being obtainable according to a method involving melting in the presence of intense mechanical energy. The quantity of carbon nanofillers in the active material represents 1 to 25% by weight with respect to the total weight of the active material. The active material according to the invention allows an improvement in the electronic conductivity of the formulation of the electrode. Another aspect of the invention is the use of the active material in an electrode, in particular in a Li&#x2014;S battery cathode.

Active electrode material for a Li&#x2014;S battery

Hardenable inorganic systems such as cements, plasters, ceramics or liquid silicates, usable for example in the building trade, construction industry or oil drilling industry. The insertion of carbonaceous nanofillers, such as carbon nanotubes, for reinforcing mechanical properties and improving such systems. A method for producing a master mixture including at least one superplasticiser and carbonaceous nanofillers at a mass ratio of between 0.1% and 25%, preferably between 0.2% and 20%, in relation to the total weight of the master mixture, and also to said master mixture thus obtained and to the use thereof in a hardenable inorganic system with a view to producing materials with improved properties. The disclosure applies to the construction industry, the building trade and the oil drilling industry.

Method for producing a master mixture based on carbonaceous nanofillers and super plasticiser, and the use thereof in hardenable inorganic systems

A method for the manufacture of a paste composition suitable for the production of an electrode for lead-acid battery, including mixing a carbon nanofiller/lead oxide composite of a first particulate size with sulphuric acid, water and further lead oxide of a second particulate size. Also, the paste thus obtained, the composite used in its manufacture, and the electrode and lead-acid battery obtained from this paste.

Method for manufacturing an electrode paste

A composite material containing a polymer composition and a very low concentration of carbon nanofillers, in particular carbon nanotubes, having improved mechanical properties. The method for producing said composite material and to the different uses thereof. The use of carbon nanofillers at a concentration of between 0.1 ppm and 99 ppm in order to improve mechanical properties, in particular the tensile properties of a polymer matrix encasing at least one polymer selected from a thermoplastic polymer alone or mixed with an elastomer resin base, while facilitating the shaping thereof into composite parts using any suitable technique, in particular injection, extrusion, compression or molding, and while improving the electrostatic dissipation capability thereof.

Composite material having a very low content of carbon-based nanofillers, process for the preparation thereof and uses thereof

A method for manufacturing a continuous carbon fiber from a precursor material. According to this method, a precursor material including a continuous natural fiber and carbon nanofillers is used, said natural fiber being obtained from at least one plant constituent such as a cellulose. A process for manufacturing a continuous carbon fiber from a precursor material, including a step of carbonization of said precursor material, in which the precursor material includes a continuous natural fiber and carbon nanofillers, said natural fiber being obtained from at least one plant constituent, wherein it also includes a step of sizing the precursor material before the carbonization step.

Method for manufacturing a carbon fibre, precursor material used by the method and carbon fibre obtained

An oil-based masterbatch in the form of granules containing carbon nanotubes. Also, a method for preparing an oil-based masterbatch in the form of granules containing carbon nanotubes. Also, the use of an oil-based masterbatch in the form of granules containing carbon nanotubes for manufacturing an aqueous or organic viscoelastic fluid, intended for drilling in underground formations.

Masterbatch for manufacturing a drilling fluid

The use of very low concentrations of carbon nanofillers selected from among carbon nanotubes, carbon nanofibers, graphene or a mixture of same in any proportions, in order to improve resistance to ageing, in particular protection against ultraviolet (UV) light, of a composite material based on a polymer matrix. A composite product comprising a composite material, the composite material stabilized with respect to UV light using a content of between 1 ppm and 0.1% by weight, of carbon-based nanofillers chosen from carbon nanotubes, carbon nanofibers, graphene or a mixture of these in all proportions, wherein the composite product is selected from yarns, films, tubes, fibers, and nonwovens.

Use of carbon-based nanofillers at a very low content for the UV stabilization of composite materials

Hardenable inorganic systems such as cements, plasters, ceramics or liquid silicates, usable for example in the building trade, construction industry or oil drilling industry. The insertion of carbonaceous nanofillers, such as carbon nanotubes, for reinforcing mechanical properties and improving such systems. A method for producing a master mixture including at least one superplasticizer and carbonaceous nanofillers at a mass ratio of between 0.1% and 25%, preferably between 0.2% and 20%, in relation to the total weight of the master mixture, and also to said master mixture thus obtained and to the use thereof in a hardenable inorganic system with a view to producing materials with improved properties. The disclosure applies to the construction industry, the building trade and the oil drilling industry.

Method for producing a master mixture based on carbonaceous nanofillers and superplasticiser, and the use thereof in hardenable inorganic systems

The subject of the present invention is a process for preparing a precomposite based on nanotubes, comprising bringing said nanotubes into contact with at least one given plasticizing agent. It also relates to a precomposite thus obtained, and to its use for conferring at least one electrical, mechanical and/or thermal property on a polymer material. It also relates to the use of a given plasticizer for improving the dispersion and/or mechanical properties and/or electrical conductivity and/or thermal conductivity of nanotubes in a polymer matrix.

Process for preparing precomposites based on nanotubes, particularly carbon nanotubes

The present invention relates to a composite of carbon nanotubes and of graphenes in agglomerated solid form comprising: The present invention also relates to a process for preparing said composite, its use for the manufacture of a composite product, and also to the various applications of the composite product.

Growing community of inventors

Pau, France

Alexander Korzhenko