Johnson Matthey Public Limited Company

Universitéde Montreal

La Corporation De L'ecole Polytechnique De Montreal

Patrice Chartrand

Michel Gauthier

Guoxian Liang

Jasmin Dufour

Dean MacNeil

Joseph Wontcheu

Pierre Sauriol

Mickael Dollé

Majid Talebi-Esfandarani

Dolle Mickael

Mickael DollÉ

There is provided a process for producing LiMXO, comprising the steps of reacting a source of lithium, a source of M, and a source of X together, in a melted state at a reaction temperature between 900 to 1450 C, in the presence of an excess of (A) a solid-solid reducing couple having an oxygen partial process at equilibrium (pO) comprised between 10and 10atm at said reaction temperature according to an Ellingham-Richardson diagram for oxides, or (B) one component of the solid-solid reducing couple together with a gas-gas reducing couple having an oxygen partial pressure equilibrium (pO) between 10and 10atm at said reaction temperature according to an Ellingham-Richardson diagram of oxides, and under thermic equilibrium and thermodynamic equilibrium. There is also provided a LiMXOmelt-solidified product free from off-composition impurities.

Processes for producing LiMXOand products thereof

There is provided a process for preparing a crystalline electrode material, the process comprising: providing a liquid bath comprising the electrode material in a melted state; and introducing a precursor of the electrode material into the liquid bath, wherein the electrode material comprises lithium, a metal and phosphate. There is also provided a crystalline electrode material, comprising lithium substituted by less than 0.1 atomic of Na or K; Fe and/or Mn, substituted by less than 0.1 atomic ratio of: (a) Mg, Ca, Al and B, (b) Nb, Zr, Mo, V and Cr, (c) Fe(III), or (d) any combinations thereof; and PO, substituted by less than 20% atomic weight of an oxyanion selected from SO, SiO, BO, PO, and any combinations thereof, the material being in the form of particles having a non-carbon and non-olivine phase on at least a portion of the surface thereof.

Process for preparing crystalline electrode materials and materials obtained therefrom

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Montreal, Canada

Patrice Chartrand