Short carbon nanotube for catalyst support, method of preparing the same, catalyst impregnated carbon nanotube using the same, and fuel cell using the catalyst impregnated carbon nanotube

摘要

The present invention is related to a short carbon nanotube for a catalyst support. In particular, the short carbon nanotube may be opened at both ends, a length of less than about 300 nm, and an aspect ratio in the range of about 1 to about 15. The short carbon nanotube has a broad surface area and better electric conductivity and is opened at both ends, thereby impregnating a metallic catalyst into the inner side of the carbon nanotube. Also, a catalyst impregnated carbon nanotube has a broad effective specific surface area, and thus, has an improved efficiency of catalyst utilization, can reduce an amount of the catalyst used and can efficiently diffuse a fuel. Accordingly, when catalyst impregnated carbon nanotube is used in a fuel cell, etc., improvements can be made in the pricing, power density of an electrode, and energy density of a fuel cell.