Saft

Centre National De La Recherche Scientifique

Umicore

Alcatel

Saft Groupe Sa

Societe Anonyme Dite: Saft

Universite Paris Xii Val De Marne

Ensicaen

Unicaen

Université Paris-Est Créteil Val De Marne (Upec)

Center National De La Recherche Scientifique (crns)

Centre National Detudes Spatiales

Universitè De Montpellier

Centre National De La Recherche Scientifique-cnrs

Universite De Paris Est Creteil Val De Marne Upec

Christian Jordy

Georges Caillon

Thierry Hezeque

Claudette Audry

Jacques Bouet

Stephane Levasseur

Bernard Knosp

Michel Latroche

Fermin Cuevas

Evgeniya T Devyatkina

Nina V Kosova

Andre Lecerf

Philippe Biensan

Jean-Louis Liska

Thierry Berlureau

Josette Olivier-Fourcade

Jean-Claude Jumas

Jean-Pierre Boeuve

Stéphane Levasseur

Annick Percheron-Guegan

Florent Fischer

Ha Anh Dao

Daniel Gicquel

Michel Mimoun

Junxian Zhang

Pedro Lopez-Aranguren

Melanie Freire

Laurent Aldon

Thlerry Hezeque

Alix Ladam

Nicolas Bibent

Adam Watson

Kostyantyn Kylyvnyk

Pierre-Emmanuel Lippens

André Lecerf

A lithium/sulfur electrochemical element () comprising: a cathode () comprising: i) carbon having a porous structure () comprising pores with a mean diameter less than or equal to 6 nm; ii) sulfur having a degree of oxidation between 0 and −2 in the pores of the carbon; b) an electrolyte comprising: i) at least one organic solvent which is a carbonate; ii) one or more salts, at least one salt being lithium bis(fluorosulfonyl)imide; c) an anode () comprising lithium metal or a metallic alloy of lithium. Such an element provides increased safety of use because it limits the quantity of hydrogen sulfide that can be emitted in the event of an electrolyte leak or in the event of exposure of an electrode of the element to water.

Lithium/sulphur electrochemical cell

The invention relates to a compound of the formula LiPSX(BH), in which x is selected from the group comprising Cl, Br, I, F and CN, 0&#x2264;x&#x2264;2, 0&#x2264;z&#x2264;0.50. This compound can be used as a solid electrolyte of a lithium-ion electrochemical element.

Solid electrolyte for a lithium-ion electrochemical cell

A sacrificial positive active material for a lithium-ion electrochemical element which is a compound of formula (LiO)(MnO)(MnO)(MO)in which: x+y+z+t=1; 1&#x2212;x&#x2212;y&#x2265;0; 0.97&#x2265;x&#x2265;0.6; y&#x2264;0.45; x &#x2212;0.17; y&#x2265;0; y+z&#x3e;0; t&#x2265;0; 1&#x2264;a&#x3c;3. M is selected from the group consisting of Fe, Co, Ni, B, Al, Ti, Si, V, Mo, Zr and a mixture thereof.

Sacrificial active material of a positive electrode for a lithium-ion electrochemical element

Positive electrode material for lithium-ion battery

A compound of formula Li(MMo)M(OF) wherein: 

Positive electrode material for a lithium-ion accumulator

An alloy comprising tin, silicon and carbon, and containing a crystalline M-Sn phase, M being an inert metal. An alloy comprising tin and silicon, comprising: A manufacturing process for this alloy.

Active material composition for the negative electrode of a lithium-ion accumulator

An electrochemically active material resulting from substituting a portion of the nickel in a single-phase composite oxide of nickel and lithium of the LiNiOtype, characterized in that the active material satisfies the formula:Li(MLiMM)Oin which: 0.02&#x3c;a&#x2266;0.25; 0&#x2266;b&#x3c;0.30; 0&#x2266;c&#x3c;0.30; (a+b+c)&#x3c;0.50; Mis at least one element selected from Al, B, and Ga; Mis at least one element selected from Mg and Zn; andM=NiCoMnMin which Mis at least one element selected from Fe, Cu, Ti, Zr, V, Ga, and Si; and 0&#x2266;x&#x3c;0.70; 0.10&#x2266;y&#x3c;0.55; 0&#x2266;z&#x3c;0.30; and 0.20&#x3c;(1-x-y-z); b+c+z&#x3e;0; and in that said active material, regardless of its state of charge, satisfies the relationship:0.40&#x3c;R&#x3c;0.90, where:=(1-a-b-c)*[3-[(n/n)/(4-2-3)]*(2--2)]in which: nis the lithium content expressed in moles; nis the sum of the contents of Ni, Mn, Co, and Mexpressed in moles; and dis the overall degree of oxidation of M.

Electrochemically active material for the positive electrode of an electrochemically rechargeable lithium cell

An aqueous alkaline electrolyte Ni-MH sealed secondary storage cell includes a bundle of electrodes placed in a container and made up of a plurality of negative and positive electrodes. The space separating the negative electrode from the positive electrode contains a separator. The separator is permeable to gases and a recombination device is placed between two adjacent negative electrodes and has a wetting angle of at least 45&deg;, an average pore section of at least 10 &mgr;m , and a thickness from 0.2 mm to 5 mm.

Sealed storage cell with an improved recombination device

A monophase hydridable material for the negative electrode of a nickel-metal hydride storage battery with a 'Lave's phase' structure of hexagonal C14 type (MgZn.sub.2) has the general formula:

Hydridable material for the negative electrode in a nickel-metal hydride

The material is derived from the compound TiNi, is a single-phase material and is expressed by the following general formula:

Hydridable material for the negative electrode of a nickel-hydride

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