Journal of Fundamentals of Renewable Energy and Applications
Open Access

Enhanced specific capacitance of iron doped polyaniline/sulfonated carbon nanotubes after freeze-drying treatment for all-solid-state symmetric supercapacitor

2^nd International Conference on Battery and Fuel Cell Technology

July 27-28, 2017 | Rome, Italy

Sherif A El-Khodary

Housing & Building National Research Center, Egypt

Posters & Accepted Abstracts: J Fundam Renewable Energy Appl

Abstract :

The electrode materials based on iron doped polyaniline (Fe-PANI) over the surface of sulfonated multi-walled carbon nanotubes (s-MCNTs) also followed by freeze-drying treatment (FD-Fe-PANI@s-MCNTs) are reported for high performance electrochemical energy storage applications. The structure, morphology and thermal properties of the obtained samples are detected. Also, N2 sorption isotherm for FD-Fe-PANI@s-MCNTs shows high specific surface area 280.26 m2 g-1 calculated by Brunauer-Emmett-Teller (BET) method after the freeze-drying treatment. The electrochemical properties of the electrode samples are assessed by cyclic voltammetry and galvanostatic charge/discharge testes in the 1 M H2SO4 aqueous electrolyte. The FD-Fe-PANI@s-MCNTs electrode with this high surface area shows high specific capacitance of 2105.64 F g-1 at 1 A g-1. The symmetric solid-state supercapacitor device (SCs) based on FD-Fe-PANI@s-MCNTs electrode gave a specific capacitance of 776.85 F g-1 at 1 A g-1, energy density 13.55 Wh kg-1, power density 177.50 W kg-1 and exhibit rate capability (�59% retention at 20 A g-1). Furthermore, the symmetric supercapacitor device shows good cycling stability (91.6%) after 500 cycles at a scan rate 200 mV s-1, suggesting the potential application of FD-Fe-PANI@s-MCNTs for energy storage devices.