Methods of oxidizing multiwalled carbon nanotubes

(57) The oxidization method of a summary multiwalled carbon nanotube is offered. A multiwalled carbon nanotube oxidizes by contacting the carbon nanotube to a gaseous phase oxidizer like CO, O, steam, NO, NO, NO, O, and ClO. 近臨界水 and supercritical water can also be used as an oxidizer. The multiwalled carbon nanotube which oxidized in accordance with the method of the present invention can be used in order to manufacture the hard porous structure which can be used for forming the electrode for processing of the improved electrochemical capacitor.