Active substance for lithium secondary battery

Details Active substance for lithium secondary battery Active substance for lithium secondary battery

H - Electricity

01

M

H01M 4/58 (2006.01) H01M 4/48 (2006.01) H01M 10/40 (2006.01) H01M 4/50 (2006.01) H01M 4/52 (2006.01)

Patent

CA 2443572

A lithium secondary battery-use active matter containing a material capable of electrochemically desorbing and inserting Li, and having a metallic iron grade in the material of less than 5 ppm; and a lithium secondary battery having this active mattter. An iron grade in the material of less than 5 ppm can keep a capacity maintaining factor within a high-value range after specified cycles to improve the performance of a lithium secondary battery.

L'invention concerne une matière active utilisée dans des accumulateurs au lithium, contenant un matériau permettant une désorption et une insertion électrochimique du lithium et présentant une teneur en fer métallique inférieure à 5 ppm. L'invention concerne également un accumulateur au lithium contenant cette matière active. Une teneur en fer du matériau inférieure à 5 ppm permet de maintenir un facteur de maintien de capacité dans une large plage de valeurs après des cycles spécifiés afin d'améliorer les performances d'un accumulateur au lithium.

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