Commissariat a L'energie Atomique

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Prayon

Commissariat À L'énergie Atomique Et Aux Énergies Alternatives

Centre National De La Recherche Scientifique-cnrs

Sébastien Martinet

Carole Bourbon

Marianne Chami

Sébastien Patoux

Alain M Gourgue

Fannie Alloin

Frederic Le Cras

Frédéric Le Cras

David Peralta

Sébastien Launois

Alain Germeau

Jean-Francois Colin

Jean-Claude Lepretre

Yagmur Celasun

Jean-Yves Sanchez

Jean Brun

Raphaël Salot

Sylvie Genies

Frédéric Dewulf

Guillaume Lefevre

Djamel Mourzagh

Celine Barchasz

Jean-François Colin

Sebastien Patoux

Céline Barchasz

Laureline Crepel

Sylvain Franger

Christine Lefrou

Ludovic Rouillon

Mélanie Alias

Carole Pagano

Gilles Poupon

Helene Lignier

Marion Chandesris

Rémy Mingant

Jean-Baptiste Ducros

Isabelle Willems

Hélène Lignier

Dominique Perrin

Loïc Simonin

Florence Masse

Jérémie Salomon

Lucas Sannier

Damien Djian

Florence Fusalba

David Sicsic

Bramy Pilipili Matadi

Frédéric Fabre

Marlène Chapuis

Pierre Feydi

Nourhan Mohamed

Alain Gourgue

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.

Specific electrochemical cell for accumulator operating according to the principle of forming an alloy with the active material of the negative electrode comprising a specific pair of electrodes

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.

Synthesis method

A material of formula LiTi(AS)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

Lithiated material

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; Rand Rare identical or different and chosen independently from the group formed by &#x2014;CH&#x2014;, a cyclic or acyclic, linear or branched alkyl chain; Ris chosen from the group formed by &#x2014;CH, 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;

Electrochemical generator and method of producing such a generator

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.

Lithium electrochemical accumulator having a specific bipolar architecture

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.

Lithium batteries containing lithium-bearing iron phosphate and carbon

The invention relates to a diazonium aryl salt devoid of hydroxyl functions of the following general formula (1):XN&#x2261;N-A-R&#x2014;(OR)&#x2014;O&#x2014;R-A'-N&#x2261;NX&#x2003;&#x2003;(1)in which: n is in a range of from 1 to 10, preferably from 1 to 4, Xrepresents a counter-ion of the diazonium cation selected from the group consisting of halogenides, BF&#x2014;, NO&#x2014;, HSO&#x2014;, PF&#x2014;, CHCOO&#x2014;, N(SOCF)&#x2014;, CFSO&#x2014;, CHSO&#x2014;, CFCOO&#x2014;, (CHO)(H)PO&#x2014;, and N(CN)&#x2014;;R, Rand Rare identical or different and are independently selected from the group consisting of &#x2014;CH&#x2014;, a cyclic alkyl group, an acyclic alkyl group, a linear alkyl group, and a branched alkyl group; andA and A&#x2032; 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.

Aryl diazonium salt and use in an electrolytic solution of an electrochemical generator

A lithium-ion storage battery includes LiFePOas 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.

High-power lithium-ion storage battery

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.

Non-aqueous electrolyte for a high-voltage lithium battery

The invention relates to a lithium battery including a cell comprising:

Lithium battery using an aqueous electrolyte

Process for the preparation of an insertion compound of an alkali metal in which the following successive stages are carried out:

Method for preparing insertion compounds of an alkali metal, active materials containing same, and devices comprising said active materials

Double pole battery comprising three electrochemical cells stacked along a longitudinal axis, each cell consisting of an anode, a cathode and an electrolyte placed between the anode and the cathode, a current collector plate electrically connecting an anode of a cell and a cathode of an adjacent cell, a current collector plate on the anode of a cell located at a first longitudinal end of the stack, a current collector plate on the cathode located at a second longitudinal end of the stack, an electrolyte-proof lateral wall surrounding each cell between each pair of successive collector plates, wherein the lateral walls of two adjacent cells are offset transversely one relative to the other relative to the longitudinal axis, in such a way they are not superposed one on the other.

Multi pole battery with improved interplate leakproofing

The method for determining the state of charge of a battery can be used during charging or discharging of the battery at constant current. It comprises placing the battery in open circuit during a recovery period until the voltage at the terminals of said battery stabilizes at a voltage plateau. Then a constant test voltage is applied to the battery terminals during a preset test period. The state of charge of the battery corresponds to the current measured at the end of the test period by means of a previously obtained calibration curve.

Method for determining the state of charge of a battery in charging or discharging phase at constant current

The invention relates to a lithium battery, comprising at least one lithium intercalation compound, made up of crystallites and obtained by a production method, comprising at least the following steps: formation of a homogeneous mixture of at least one precursor for the lithium intercalation compound with a given adjunct, chemically stable with relation to crystallites and designed to limit the growth of crystallites or crystallite precursors during the formation thereof, thermal treatment of the homogeneous mixture for the synthesis of the lithium intercalation compound in the form of crystallites and to give a composite material comprising at least two phases formed respectively by the lithium intercalation compound and the adjunct and forming of the composite material to give said electrode. The invention further relates to an electrode obtained by said method and lithium battery comprising such an electrode.

Electrode for a lithium battery, method for production of such an electrode and lithium battery comprising said electrode

Growing community of inventors

Grenoble, France

Sébastien Martinet