Saft

Alcatel

Centre National De La Recherche Scientifique

Umicore

Saft Groupe Sa

Philippe Biensan

Andre Lecerf

Bernard Simon

Julien Breger

Clemence Siret

Frederic Castaing

Christian Jordy

Claudette Audry

Claude Delmas

Stephane Levasseur

Cécile Tessier

Jean-Pierre Boeuve

Sylvie Barusseau

Jean-Paul Peres

Dominique Ligeois

Stéphane Levasseur

Laurence Croguennec

Sylvie Baudry

Serge Flandrois

Jessica Bains

Frédéric Castaing

Cecile Teissier

Sylvie Herreyre

Olivier Jan

Fran&ccedil;oise Perton

Bridget Deveney

Lucas Caratero

Kamen Nechev

Damien Gallet

Annie Fevrier

Odile Godiveau

David Germond

André Lecerf

Jean-Marc Laluque

Frédéric Bonhomme

Clémence Siret

The invention concerns a multi-battery assembly, and a container comprising such an assembly, for use in particular in the field of high energy-density assemblies comprising a plurality of Ni&#x2014;Cd, Ni-MH, lead-acid or Li-ion stationary batteries stored in a container or a library-like room. The multi-battery assembly comprises at least three rows (to) of batteries (to) connected in series and/or parallel, including two end rows () and at least two intermediate rows (), each row being connected in series and/or parallel to at least one adjacent row, extending in a first direction (d), and comprising at least one level (to) of a plurality of batteries connected in series and/or parallel, each of the levels extending in the first direction (d). At least each intermediate row is a row that is movable relative to an adjacent row in a second direction (d) substantially perpendicular to the first direction (d), and is connected in series and/or parallel to said adjacent row by one of the batteries of one of the levels of same and by one of the batteries of one of the levels of said adjacent row by means of a connection element (to) that is configured to maintain the connection between the movable row and the adjacent row while allowing the movable row to move relative to the adjacent row in the second direction (d), so as to allow at least one temporary corridor () to be created between the movable row and the adjacent row without disconnection.

Multi-battery assembly and container comprising such an assembly

A lithium-ion battery containing: a positive electrode, a negative electrode, an electrolyte comprising: an organic solvent chosen from the group comprising carbonates, linear esters of a saturated acid, or a mixture thereof, an additive capable of forming a passivation film on the surface of the negative electrode, at least one lithium salt, at least one ionic liquid for which the percentage by weight in the electrolyte is greater than or equal to 20% and less than 50%; a separator for which the apparent contact angle between the surface thereof and the electrolyte is less than 20&#xb0;.

Lithium-ion battery containing an electrolyte comprising an ionic liquid

A composition including (a) a lithiated oxide of transition metals containing at least nickel, cobalt and aluminum and (b) a lithiated phosphate of at least one transition metal, the surface of which is at least partially covered by a layer of carbon. In the composition, the proportion by mass of the lithiated oxide of transition metals containing at least nickel, cobalt and aluminum is less than or equal to 10% of the weight of the composition, and the proportion by mass of the lithiated phosphate of at least one transition metal is greater than or equal to 90% of the weight of the composition. A lithium-ion or lithium-polymer type accumulator including at least one positive electrode containing this composition.

Positive electrode material for lithium-ion accumulator

A compound of formula Li(NiMnCoAl)Owherein: a, b and c are non-zero; a+b+c+y=1; 1.05&#x2266;(1+x)/(1&#x2212;x)&#x2266;1.25; 0.015&#x2266;y(1&#x2212;x); and the atomic amount of manganese representing from 95% to 100% of the atomic amount of nickel.

Positive electrode material for a lithium ion accumulator

A subject of the invention is a mixture of solvents for the electrolyte of a lithium battery, which mixture of solvents comprises with respect to the volume of said mixture, The invention is also aimed at a lithium battery comprising a liquid electrolyte having this composition. The battery according to the invention is able to operate at temperatures which can range up to approximately &#x2212;60&#xb0; C. A subject of the invention is also the use of a battery according to the invention at temperatures which can range up to &#x2212;60&#xb0; C.

Lithium battery operating at very low temperature

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

The present invention provides a rechargeable lithium electrochemical cell comprising an electrolyte containing a lithium salt dissolved in a non-aqueous solvent, at least one positive electrode, and at least one negative electrode of the paste type containing an electrochemically active material which is a carbon compound suitable for inserting lithium ions and a binder, the cell being characterized in that said solvent contains at least one saturated cyclic carbonate and at least one linear ester of a saturated aliphatic monocarboxylic acid, and in that said binder is a polymer having no fluorine.

Rechargeable lithium electrochemical cell usable at low temperature

Active cathode material for a lithium rechargeable cell

The present invention concerns an electrode for a rechargeable lithium cell, containing an electro-chemically active material with general formula ##EQU1## where M is at least one transition metal selected from nickel, cobalt, manganese, and iron, A is selected from magnesium and calcium, and D is at least one element selected from the elements of groups 4b to 5a of the periodic classification.

Lithium electrode for a rechargeable electrochemical cell

The present invention relates to the use of an organic acid compound for substantially eliminating the presence of free LiOH in an ink composition for positive electrodes, wherein said organic acid compound is chosen from the set constituted by: (.alpha.) C.sub.1 -C.sub.4 carboxylic acids; (.beta.) C.sub.2 -C.sub.4 fluorocarboxylic acids; (.gamma.) anhydrides thereof; and (.delta.) mixtures thereof. It also relates to a positive electrode ink containing said organic acid compound, and to a method of preparing said ink.

Composition for a positive electrode, a method of preparing said

The present invention consists in a rechargeable cell having an anode made from materials in which lithium can be inserted, a cathode and an electrolyte constituted by a solution of a lithium salt in a non-aqueous solvent. The material of said cathode includes at least one substance which is a yellow-green single-phase oxide of lithium and manganese with an orthorhombic crystal structure with the following lattice parameters: a=0.459.+-.0.004 nm, b=0.577.+-.0.004 nm and c=0.281.+-.0.003 nm and containing lithium ions in a molar ratio Li/Mn such that 0.85.ltoreq.Li/Mn.ltoreq.1.10. After a first charge said substance is discharged in two stages of which the higher is at a mean voltage greater than 3.5 volts relative to the lithium.

Chargeable lithium electrochemical cell and method of manufacting it

The present invention concerns a carbon anode for a lithium rechargeable electrochemical cell, comprising a graphite-containing carbon-containing material which includes, prior to electrical cycling, at least a first phase constituted by graphite having a rhombohedral crystal structure and comprising a fraction of more than 10%.

Carbon anode for a lithium rechargeable electrochemical cell and a

Growing community of inventors

Carignan de Bordeaux, France

Philippe Biensan