Cathode active material for lithium secondary batteries and...

Details Cathode active material for lithium secondary batteries and... Cathode active material for lithium secondary batteries and...

H - Electricity

01

M

H01M 4/131 (2010.01) H01M 4/1391 (2010.01) H01M 4/04 (2006.01)

Patent

CA 2674756

A cathode active material for a lithium secondary battery includes a lithium metal oxide secondary particle core formed by agglomerating lithium metal oxide primary particles; and a shell formed by coating the secondary particle core with barium titanate and metal oxide. This cathode active material allows making a lithium secondary battery having improved safety, particularly in thermal stability and overcharging characteristics.

L'invention concerne un matériau actif de cathode pour une pile secondaire au lithium comprenant un noyau de particules secondaires d'oxyde de métal de lithium formé en agglomérant des particules primaires d'oxyde de métal de lithium ; et une enveloppe formée en recouvrant le noyau de particules secondaires avec du titanate de baryum et de l'oxyde de métal. Ce matériau actif de cathode permet de fabriquer une pile secondaire au lithium ayant une sécurité améliorée, en particulier des caractéristiques de stabilité thermique et de surcharge.

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