▎ 摘　　要

NOVELTY - Method (M1) involves physically attaching at least one metal, metal compound or oxide to walls of carbon nanotubes; treating the metals, metal compounds or oxides to bond metals, metal compounds, or oxides chemically to the carbon nanotubes; removing metals, metal compounds or oxides from the walls of carbon nanotubes resulting in defected carbon nanotubes; and unzipping the defected carbon nanotubes into graphene sheets or ribbons. USE - For production of graphene sheets or ribbons, used for making supercapacitors. ADVANTAGE - The annealing is performed in controlled environment to prevent decomposition of carbon nanotube (CNT) structures or to assist the reaction between metals, metal compounds, and oxides and carbon atoms of CNTs. The method is performed in less stages and short processing time and the chemicals used in the process may be re-used. The process requires treatment at temperature (around 300 degrees C for annealing; 20-70 degrees C for acid treatment), and is able to open ultra-long carbon nanotubes to make graphene nanoribbons and graphene sheets. The process yields high quality unzipped CNTs with characteristics such as: completely unzipped multiwall CNTs to yield pure carbon nanoribbons; partially unzipped multiwall CNTs to produce hybrid of carbon nanoribbons and CNTs; and unzipped CNTs with different degree of defects on carbon nano-ribbons or graphene sheets, which may be important to the performance of electrodes for supercapacitors or other applications. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for supercapacitor produced by the method (M1).