Dynamic high potential treatment with dilute acids for lifting the capacitive performance of carbon nanotube/conducting polymer electrodes

摘要: Abstract The capacitive behavior of the electrodes, fabricated from multiwalled carbon nanotubes (MWCNTs) and poly-3,4-ethlyenedioxythiophene–polystyrene sulfonate (PEDOT–PSS), before after dynamic high potential treatment with dilute HNO 3 solutions, is investigated. specific capacitance (C sp ) treated MWCNTs/PEDOT–PSS electrodes can be ~ 2.5 times higher than that untreated electrodes. drop C in cycliability study for 0.8%, much less (16%). However, excessive deteriorate performance morphology composites revealed by transmission electron microscopy has no change treatment. data Raman spectroscopy show chemical structure MWCNTs remains unchanged. newly formed functional groups (COOH, O S O) are deemed to generated electrochemical oxidation PEDOT, according X-ray photoelectron Fourier transform infrared data. It suggested due interplay between two effects: 1) degradation PEDOT leads loss characteristics; 2) result increase .