Method for manufacturing active material of positive plate...

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H01M 4/58 (2006.01) H01M 4/04 (2006.01) H01M 4/36 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2334386

A method for manufacturing an active material of a positive plate which is doped/dedoped well reversely with/of lithium comprising a mixing step of mixing materials to be used as a synthetic material of a compound whose composition is expressed by a general formula LixMyPO4 (where 0~x<=2, 0.8<=y<=1.2, and M is at least one element among the 3d transition metals) to produce a precursor and a baking step of baking the precursor to cause a reaction, wherein a reducing agent is added to the precursor at the mixing step.

L'invention porte sur un procédé de production de matière active d'une plaque positive qu'on peut doper au lithium ou débarrasser de son dopage au lithium par l'opération inverse. Le procédé comporte une étape qui consiste à mélanger des matières utilisables comme matériau synthétique d'un composé de la formule générale Li¿x?M¿y?Po¿4? (dans laquelle 0~x<=2; 0,8<=y<=1,2; et M est au moins un élément parmi les métaux de transition de la classe 3), pour produire un précurseur. Le procédé comporte une étape de cuisson du précurseur destinée à provoquer une réaction pendant laquelle un réducteur est ajouté au précurseur à l'étape du mélange.

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