Electroactive material, and use thereof in anodes for...

H - Electricity – 01 – M

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H01M 4/48 (2010.01) H01M 4/131 (2010.01) H01M 4/133 (2010.01) H01M 4/1391 (2010.01) H01M 4/1393 (2010.01) H01M 4/587 (2010.01) H01M 4/38 (2006.01) H01M 4/485 (2010.01) H01M 10/0525 (2010.01) H01M 4/36 (2006.01)

Patent

CA 2754711

The invention relates to a novel electroactive material comprising a graphitic carbon phase C and a (semi)metal phase and/or a (semimetal) oxide phase (MO x phase) as well as the use of said electroactive material in anodes for lithium-ion cells. The invention also relates to a method for producing such materials. The electroactive material comprises: a) a carbon phase C; b) at least one MO x phase, wherein M represents a metal or semimetal, x represents a number from 0 to < k/2, k meaning the maximum valency of the metal or semimetal. The carbon phase C and the MO x phase in the electroactive material according to the invention form substantially co-continuous phase domains, the maximum average distance between two adjacent domains of iden-tical phases amounting to 10 nm, particularly 5 nm, and even more particularly 2 nm.

L'invention concerne une nouvelle matière électroactive comprenant une phase de carbone graphite C et une phase de (semi)métal et/ou une phase d'oxyde (de semimétal) (phase MOx), ainsi que l'utilisation de cette matière électroactive dans des anodes pour des cellules aux ions lithium. Cette invention concerne également un procédé pour produire ces matières. La matière électroactive comprend : a) une phase de carbone C; b) au moins une phase de MOx, formule dans laquelle M représente un métal ou semi-métal, x désigne un nombre supérieur ou égal à 0 et strictement inférieur à k/2, k étant la valence maximale du métal ou semimétal. Dans la matière électroactive selon l'invention, la phase de carbone C et la phase MOx forment des domaines de phase sensiblement co-continus. Selon l'invention, la distance moyenne maximale entre deux domaines adjacents comportant des phases identiques est égale à 10 nm, en particulier 5 nm, et plus spécifiquement 2 nm.

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