Polyindole/carbon nanotubes (PIN/CNTs) composite was prepared byan in-situ chemical oxidative polymerization of indole monomer withCNTs using ammonium persulfate as oxidant. The obtained compositematerial was characterized by SEM, TEM, FT-IR, Raman spectroscopy,XPS, XRD and BET surface areas measurements. It was found that theCNTs were incorporated into the PIN matrix and nanoporous structurewas formed. Spectroscopy results showed that interfacial interactionbonds might be formed between the polyindole chains and CNTs duringthe in-situ polymerization. PIN/CNTs composite was evaluated byelectrochemical impedance spectroscopy, cyclic voltammetry andcharge/discharge tests to determine electrode performances in relation tosupercapacitors properties in both aqueous and non-aqueous system. Amaximum specific capacitance and specific volumetric capacitance of555.6 F/g and 222.2 F/cm3 can be achieved at 0.5 A/g in non-aqueoussystem. It also displayed good rate performance and cycling stability. The specific capacitance retention is over 60% at 10 A/g and 91.3%after 5000 cycles at 2 A/g, respectively. These characteristics point to itspromising applications in the electrode material for supercapacitors.
Polyindole/carbon nanotubes (PIN/CNTs) composite was prepared byan in-situ chemical oxidative polymerization of indole monomer withCNTs using ammonium persulfate as oxidant. The obtained compositematerial was characterized by SEM, TEM, FT-IR, Raman spectroscopy,XPS, XRD and BET surface areas measurements. It was found that theCNTs were incorporated into the PIN matrix and nanoporous structurewas formed. Spectroscopy results showed that interfacial interactionbonds might be formed between the polyindole chains and CNTs duringthe in-situ polymerization. PIN/CNTs composite was evaluated byelectrochemical impedance spectroscopy, cyclic voltammetry andcharge/discharge tests to determine electrode performances in relation tosupercapacitors properties in both aqueous and non-aqueous system. Amaximum specific capacitance and specific volumetric capacitance of555.6 F/g and 222.2 F/cm3 can be achieved at 0.5 A/g in non-aqueoussystem. It also displayed good rate performance and cycling stability. The specific capacitance retention is over 60% at 10 A/g and 91.3%after 5000 cycles at 2 A/g, respectively. These characteristics point to itspromising applications in the electrode material for supercapacitors.