Preparation and electrochemical capacitance performances of super-hydrophilic conducting polyaniline

摘要

Super-hydrophilic conducting polyaniline was prepared by surface modification of polyaniline using tetraethyl orthosilicate in water/ethanol solution, whereas its conductivity was 4.16S cm~(-1) at 25 ℃. And its electrochemical capacitance performances as an electrode material were evaluated by the cyclic voltammetry and galvanostatic charge/discharge test in 0.1 M H_2SO_4 aqueous solution. Its initial specific capacitance was 500Fg~(-1) at a constant current density of l.5A g~(-1), and the capacitance still reached about 400 Fg~(-1) after 5000 consecutive cycles. Moreover, its capacitance retention ratio was circa 70% with the growth of current densities from 1.5 to 20 A g~(-1), indicating excellent rate capability. It would be a promising electrode material for aqueous redox supercapacitors.