Electrode compositions having improved cycling behavior

Details Electrode compositions having improved cycling behavior Electrode compositions having improved cycling behavior

H - Electricity

01

M

H01M 4/38 (2006.01) H01M 4/02 (2006.01) H01M 4/40 (2006.01) H01M 4/44 (2006.01) H01M 4/46 (2006.01) H01M 4/62 (2006.01) H01M 4/36 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2397060

An electrode composition that includes a plurality of composite particles and a plurality of electrically conductive diluent particles admixed with the composite particles. Each of the composite particles includes an electrochemically active metal particle and an electrically conductive layer partially covering the particle. In one aspect, the layer is present in an amount no greater than about 75 wt.% of the composite, while in another aspect the layer is present in an amount no greater than about 75 vol.% of the composite. Also featured are lithium ion batteries featuring electrodes made from these compositions.

La présente invention concerne une composition d'électrode comprenant une pluralité de particules composites et une pluralité de particules de dilution électro-conductrices ajoutées en mélange aux particules composites. Chaque particule composite comporte une particule de métal électrochimiquement active et une couche électro-conductrice recouvrant partiellement la particule. Pour l'un des aspects de l'invention, la couche est présente en une proportion n'excédant pas environ 75% du volume du composite. L'invention concerne également des accumulateurs électriques aux ions lithium comportant des électrodes réalisées à base de ces compositions.

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