Nanotube-based high energy material and method

Details Nanotube-based high energy material and method Nanotube-based high energy material and method

C - Chemistry, Metallurgy

01

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C01F 5/42 (2006.01) C01B 31/02 (2006.01) C01F 11/46 (2006.01) H01M 4/02 (2006.01) H01M 4/04 (2006.01) H01M 4/58 (2006.01)

Patent

CA 2362738

A carbon-based material containing an allotrope of carbon, such as single- walled carbon nanotubes, is capable of accepting an intercalated alkali metal. The material exhibits a reversible capacity ranging from approximately 650mAh/g to 1,000mAh/g. The high capacity of the material makes it attractive for a number of applications, such as a battery electrode (50) material. A method of producing a single-walled carbon nanotube includes purifying an as- recovered nanotube material, and depositing the purified material onto a conductive substrate (42). The coated substrate (42) is incorporated into an electrochemical cell, and its ability to accept intercalated materials, such as an alkali metal (e.g. lithium) is measured.

L'invention concerne un matériau à base de carbone, contenant un allotrope de carbone,tel qu'un nanotube de carbone à paroi unique. Ce matériau peut accepter un métal alcalin intercalaire. Ce matériau présente une puissance réversible comprise entre environ 650 mAh/g et 1 000 mAh/g. La puissance élevée de ce matériau le rend particulièrement interessant pour un certain nombre d'applications, comme matériau d'électrode de pile. L'invention a également pour objet un procédé de production d'un matériau à base de nanotube à simple paroi qui consiste à purifier un matériau de nanotube récupéré et à déposer le matériau purifié sur un substrat conducteur. Le substrat recouvert est intégré dans une pile électrochimique, avant de mesurer sa capacité à accepter des matériaux intercalaires, comme un métal alcalin (par ex. du lithium) est mesurée.

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