Electrode active material powder with size dependent...

Details Electrode active material powder with size dependent... Electrode active material powder with size dependent...

H - Electricity

01

M

H01M 4/525 (2010.01) H01M 4/131 (2010.01) H01M 4/505 (2010.01) H01M 4/04 (2006.01)

Patent

CA 2552375

The present invention relates to a powderous electrode active material of lithium transition metal oxide LiaMbO2 , wherein 0.9 < a < 1.1, 0.9 < b < 1.1 and M is dominantly transition metal chosen from Mn, Co and Nickel, having particles with a distribution of sizes, where the composition M varies with the size of the particles, and a preparation method thereof. The present invention also relates to an electrochemical cell, particularly rechargeable lithium battery, using the powderous electrode active material.

L'invention concerne une poudre de matière active pour électrodes en oxyde de métal lithium de transition Li¿a?M¿b?O¿2?, où 0,9 < a < 1,1, 0,9 < b < 1,1 et M sont principalement un métal de transition choisi dans le groupe constitué de Mn, Co et Ni, comprenant des particules avec une distribution des tailles, la composition M variant avec la taille des particules. L'invention concerne également un procédé de préparation correspondant. L'invention concerne en outre une cellule électrochimique, notamment une batterie au lithium rechargeable, utilisant ladite poudre de matière active pour électrodes.

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