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Decorated carbon nanotubes by silicon deposition in fluidized bed for Li-ion battery anodes

Coppey, Nicolas and Noé, Laure and Monthioux, Marc and Caussat, Brigitte Decorated carbon nanotubes by silicon deposition in fluidized bed for Li-ion battery anodes. (2011) In: Congrès de la Société française de génie des procédés - SFGP 2011, 29 Nov - 01 Dec 2011, Lille, France .

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Abstract

Multi-walled carbon nanotubes Graphistrength® were decorated with silicon by Fluidized Bed Chemical Vapor Deposition. The ability to fluidize of these nanotubes forming ball-shaped jumbles with diameters in the range of several hundreds of microns was first studied. Coating experiments from silane SiH4 were performed, in the 30-60wt. % range of silicon deposited. SEM and TEM imaging reveals that the nanotubes are coated by silicon nanoparticles uniformly distributed from the periphery to the center of the balls for the whole conditions tested. On-line acquisition of key process parameters evolution shows that the material remains fluidizable, even for large proportions of silicon deposited. The density of balls increases with the percentage of silicon deposited whereas their specific surface area decreases. This composite material is a promising candidate as anode material to replace graphite in lithium-ion batteries.

Item Type:Conference or Workshop Item (Paper)
Additional Information:This paper is published by : Paris : Ed. SFGP, 2011 (Series "Récents progrès en Génie des Procédés", n°101 ; ISSN 1775-335X). - ISBN 2-910239-75-6
Audience (conference):National conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Laboratory name:
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Deposited By: Brigitte CAUSSAT-BONNANS
Deposited On:06 Dec 2011 12:29

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