Perparation Of Polyaniline/Carbon Composites And Their Applications In Energy Storage

In recent years, Electrochemical Super Capacitor (ESC) has been developing as a kind of new focused energy storage devices for their novel properties. These properties include high specific capacity, quick charging and discharging rate, high efficiency, environmental friendly, long life cycle and widely using fields. Electrode material selection is critical to the preparation of electrochemical capacitor, preparing carbon material and Polyaniline to be composite material could conquer the disadvantages of each other, and increase the specific capacitance.This paper mainly studied the preparation of polyaniline/carbon composites and their electrochemical properties. Morphology of the obtained composites were characterized by transmission electron microscope and scanning electron microscopy, and the electrochemical performances of the obtained materials were tested by the cyclic voltammograms, galvanostatic charging/discharging, cycles life. Specific studies are as follows:1. First, ACF was immersed in the catalyst solution, and then situ grew CNT on the surface of ACF by chemical vapor deposition(CVD), which obtained the ACF/CNT composite, at last the CNT/ACF/PANI composite was prepared by compounding the obtained material with polyaniline(PANI). The electrochemical tests show that CNT/ACF /PANI composite has a larger specific capacity and good cycle stability, and its specific capacity can reach 158.5F·g-1(organic electrolyte).2. By filtration method, interface aside law and spraying respectively, the CNT network precursor was prepared using powder of CNT, then explored the various factors on its electrical conductivity and mechanical properties, at last determined the optimal preparative scheme.3. The CNT network was obtained by a series of follow-up processing of the CNT network precursor treatment, PANI/CNT network precursor composite and PANI/CNT network composite were prepared by compounding PANI with the CNT network precursor and the CNT network respectively. The electrochemical tests indicate that PANI/CNT network composite has a larger specific capacity and better cycle stability, and their specific capacity can reach 143.2F·g-1(organic electrolyte).