Method for forming an electrode material for a lithium ion...

H - Electricity – 01 – M

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H01M 4/26 (2006.01) H01M 4/48 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2231665

This invention pertains to a method for producing electrode materials for lithium ion batteries comprising pyrolyzing a composition comprising a silicon-containing preceramic polymer to produce a ceramic composition comprising a siliconoxycarbide (SiOC); treating the ceramic composition with a strong acid or a strong base; and thereafter introducing lithium ions into the ceramic material to form an electrode material. Treatment of the ceramic composition reduces the levels of Si and O and increases the surface area and open porosity of the ceramic thus making the ceramic more useful as an electrode material.

La présente invention a pour objet une méthode pour la production de matériaux entrant dans la fabrication d'électrodes pour batteries au lithium comportant les étapes suivantes : pyrolyse d'une composition contenant un polymère précéramique contenant du silicium pour la production d'une composition céramique contenant du siliconoxycarbure (SiOC); traitement de la composition céramique au moyen d'un acide fort ou d'une base forte; introduction des ions de lithium dans le matériau céramique pour former le matériau de fabrication des électrodes. Le traitement de la composition céramique diminue les niveaux de Si et d'O et augmente la surface active et la porosité ouverte de la céramique, ce qui accroît l'utilité de la céramique à titre de matériau de fabrication des électrodes.

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