Product and method for the processing of precursors for...

H - Electricity – 01 – M

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H01M 4/04 (2006.01) H01M 4/36 (2006.01)

Patent

CA 2542790

Methods for producing an electrode active material precursor, comprising: a) producing a mixture comprising particles of lithium hydrogen phosphate, having a first average particle size, and a metal hydroxide, having a second average particle size; and b) grinding said mixture in a jet mill for a period of time suitable to produce a generally homogeneous mixture of particles having a third average size smaller than said first average size. The precursor may be used as a starting material for making electrode active materials for use in a battery, comprising lithium, a transition metal, and phosphate or a similar anion.

La présente invention concerne des procédés de production de précurseurs de matériaux actifs d'électrodes qui consistent: (a) à produire un mélange comprenant des particules de phosphate d'hydrogène lithium possédant une première taille de particule moyenne et un hydroxyde de métal possédant une deuxième taille de particule moyenne et, (b) à moudre ce mélange dans un broyeur à jet pendant une durée qui convient pour produire un mélange généralement homogène de particules possédant une troisième taille moyenne plus petite que la première taille moyenne. Ce précurseur peut être utilisé comme matériau de départ pour fabriquer des matériaux actifs d'électrode destinés à un accumulateur comprenant du lithium, un métal de transition et un phosphate ou un anion similaire.

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