Commissariat a L'energie Atomique

3m Innovative Properties Company

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Séverine Jouanneau

Carole Bourbon

Frédéric Le Cras

Jeffrey R Dahn

Frederic Le Cras

Kevin Wilmot Eberman

Sébastien Patoux

Helene Lignier

Hélène Lignier

A material or compound is provided having a spinel structure and corresponding to the formula LiNiMnMnAO, where:

Optimised positive electrode material for lithium cell batteries, method for the production thereof, electrode, and battery for implementing said method

The present invention relates to a method of chemically modifying a lithium-based oxide comprising at least one transition metal, which comprises, in succession: Use of the modified lithium transition metal oxide as active positive electrode material for a lithium secondary battery.

Method of modifying a lithium-based oxide comprising at least one transition metal, positive electrode comprising this oxide, and lithium secondary battery

A spinel structure compound of the formula LiNiMnO, wherein &#x3b4;&#x3e;0, has a lattice parameter of from 8.179 to 8.183 &#x212b;. The compound may be prepared by mixing carbonated precursors under stoichiometric conditions to produce a mixture, subjecting the mixture to a first heat treatment at a temperature of from 500 to 700&#xb0; C., and then subjecting the mixture to one or more annealing treatments at a temperature of from 700 to 950&#xb0; C., followed by cooling in a medium containing oxygen. The spinel structure compound may be used as an electrochemically active material in an electrode, for example an electrode of a battery.

High-voltage positive electrode material having a spinel structure based on nickel and manganese for lithium cell batteries

A powdery compound selected from the group consisting of LiTiOand its derivatives selected from the group consisting of LiMTiOand LiTiNO(x and y between 0 and 0.2, M and N selected from the group consisting of Na, K, Mg, Nb, Al, Ni , Co, Zr, Cr, Mn, Fe, Cu, Zn, Si and Mo), used as active material of an electrode for a lithium storage battery, consists of unitary particles having a diameter not greater than 1 &#x3bc;m and 10-50% volume agglomerated particles having a diameter not greater than 100 &#x3bc;m wherein the agglomerated particles formed by agglomeration of said unitary particles. The method for producing such a compound preferably consists in grinding the synthesized oxide for a duration comprised between 24 hours and 48 hours in a planetary mill and in then performing thermal treatment at a temperature comprised between 450&#xb0; C. and 600&#xb0; C.

Titanium and dense lithium mixed oxide powder compound, method for producing said compound and compound-containing electrode

A method of producing Li[NiCoMn]Owherein 0.025&#x2266;x&#x2266;0.5 and 0.9&#x2266;y&#x2266;1.3. The method includes mixing [NiCoMn]OHwith LiOH or LiCOand one or both of alkali metal fluorides and boron compounds, preferably one or both of LiF and BO. The mixture is heated sufficiently to obtain a composition of Li[NiCoMn]Osufficiently dense for use in a lithium-ion battery cathode. Compositions so densified exhibit a minimum reversible volumetric energy characterized by the formula [1833-333x] measured in Wh/L.

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Fontaine, France

Séverine Jouanneau