Facile preparation of halloysite/polyaniline nanocomposites via in situ polymerization and layer-by-layer assembly with good supercapacitor performance
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The functionalization of halloysite nanotubes (HNTs) has attracted much attention in recent years due to the nano-tubular structure and particular features. Here, we report a conductive nanohybrids of HNTs, polyaniline (PANI), and poly(sodium-p-styrenesulfonate) (PSS) with high electrical conductivity (0.11 S/cm) prepared by in situ polymerization and layer-by-layer assembly. The chemical structures and morphologies were characterized by FT-IR, UV–Vis, FE-SEM, and TEM, which confirmed that the layers of PANI, PSS, and PANI were sequentially coated onto the HNTs as expected. A study of cyclic voltammetry suggested the typical pseudocapacitance and good rate performance of the as-prepared nanocomposites. The results of galvanostatic charge/discharge and electrochemical impedance spectroscopy further demonstrated its favorable capacitive behavior and low resistance. The easily fabricated halloysite/polyaniline nanocomposites show great potential as electrode materials for supercapacitors.
KeywordsPANI Specific Capacitance Electrode Material Electrochemical Impedance Spectroscopy Cyclic Voltammograms Curve
The work was financially supported by Outstanding Youth Scientific Innovation Team of Colleges and Universities in Hubei Province (T201406), the Natural Science Foundation of Hubei Province (2014CFB796), and Scientific Research Foundation of Wuhan Institute of Technology (K201508).
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