Electrode active material with multi-element based oxide...

Details Electrode active material with multi-element based oxide... Electrode active material with multi-element based oxide...

H - Electricity

01

M

H01M 4/485 (2010.01) H01M 4/131 (2010.01) H01M 4/1391 (2010.01) H01M 10/052 (2010.01)

Patent

CA 2576888

Disclosed is an electrode active material comprising: (a) electrode active material particles capable of lithium intercalation/deintercalation; and (b) a multinary oxide coating layer partially or totally formed on the surface of the electrode active material particles, the multinary oxide coating layer comprising Al, P and a halogen element. A method for preparing the electrode active material, an electrode using the electrode active material, and an electrochemical device comprising the electrode, preferably a lithium secondary battery, are also disclosed. The electrode active material comprising a multinary oxide coating layer has improved structural stability and thermal safety, and thus can provide an electrochemical device having high capacity, long service life and excellent safety.

Matière active d'électrode comprenant: (a) des particules aptes à intercaler/désintercaler du lithium; et (b) une couche de revêtement d'oxyde multinaire partiellement ou totalement formée sur la surface des particules de la matière active d'électrode, la couche de revêtement comprenant Al, P et un élément halogène. Procédé de préparation de cette matière, une électrode utilisant la matière et un dispositif électrochimique comprenant l'électrode, de préférence un accumulateur au lithium. La matière active d'électrode comprenant une couche de revêtement multinaire fait preuve d'une stabilité structurale améliorée et d'une sécurité thermique améliorée, conférant ainsi au dispositif électrochimique une capacité élevée, une longue durée de vie et une sécurité excellente.

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