Process of producing a positive electrode active material...

Details Process of producing a positive electrode active material... Process of producing a positive electrode active material...

H - Electricity

01

M

H01M 4/26 (2006.01) C01G 53/00 (2006.01) H01M 4/52 (2006.01)

Patent

CA 2216821

A process of preparing a positive electrode active material for a nonaqueous secondary battery, comprising: making a buffered aqueous solution of a water-soluble lithium compound and a water-soluble nickel compound having a definite pH, reacting with oxalic acid and a water-soluble lithium compound and a water-soluble nickel compound to yield a co-precipitate of a slightly water-soluble salt of lithium and nickel in the resulting aqueous solution, followed by calcination.

Cette invention concerne la préparation d'une matière active entrant dans la fabrication de l'électrode positive d'une batterie secondaire à électrolyte non aqueux. Le procédé comprend la préparation d'une solution aqueuse tamponnée d'un composé de lithium et d'un composé de nickel hydrosolubles à pH donné, réaction de la solution aqueuse avec l'acide oxalique pour former un co-précipité de sel de lithium et de sel de nickel légèrement hydrosoluble, suivie de calcination.

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