Supramolecular Nano-Materials for the Next Generation Supercapacitors

摘要

As one of the novel type of supercapacitor nanoenergy materials, a vapor-grown carbon fiber (VGCF) coated with a nano-thin supramolecular 1,5-diaminoanthraquinone (DAAQ) oligomer, namely, a VGCF/DAAQ was prepared. The VGCF/DAAQ was investigated spectroscopically and electrochemically for use specifically in a next-generation supercapacitor devices. An ultrasonic chemical polymerization technique using anionic oxidizing agents enabled the preparation/deposition of a thin(ca. 7nm) and uniform DAAQ film onto the surface of a VGCF. As decrease of the average thickness of the DAAQ film, an exponential increase in charge transfer rate (two orders of magnitude higher) and an enhancement of a capacitive redox behavior was attained for the VGCF/DAAQ electrode. Furthermore, the VGCF/DAAQ electrode exhibited 200 Ah kg~(-1) and maintained the value after 30,000 to 50,000 times of cycles : an excellent cycleability was shown for the nanomaterials.