CSIR – National Institute for Interdisciplinary Science and Technology (NIIST)

Council of Scientific & Industrial Research (CSIR), Govt.Of India Thiruvananthapuram.

Self- Assembled Polyaniline Nanowires Stippled Graphene- 3 – Pentadecylphenyl Phosphate Hybrid Nanocomposite Based Green Sustainable Electrodes for Supercapacitors

C. Molji, A. Aashish, K. S. Neethu and Sudha J. Devaki*

Self-assembled polyaniline nanowires stippled graphene nanocomposites (PGPCs) were prepared by in situ polymerisation of aniline in the presence of 3-pentadecylphenyl phosphate (3-PDPP) modified graphene sheets. 3-PDPP is an amphiphilic dopant derived from cardanol obtained as a waste byproduct from the cashew industry, which serves a multifunctional role as a template, a surfactant, and a dopant and facilitates the self-assembly process during the formation of the supramolecular organization of the PGPC nanocomposite. The formed PGPCs were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), pore volume, Brunauer–Emmett–Teller (BET) surface area, thermal gravimetric analysis (TGA), electrical conductivity (2.32 S cm-1) and electrochemical stability. Further symmetrical supercapacitors were fabricated with the configurations (indium tin oxide (ITO)–PGPC/Na2SO4/PGPC–ITO) and (ITO–PGPC/polyvinyl alcohol (PVA)–H3PO4/PGPC–ITO) and measured optimal specific capacitance (812.55 F g-1 using PVA–H3PO4 and 791.26 F g-1 using Na2SO4) and energy density (109.89 Wh kg-1 using Na2SO4 and 112.85 Wh kg-1using PVA–H3PO4) and cycling stability (>2000). All these interesting results suggest its suitability as a sustainable efficient electrode for the fabrication of supercapacitors.

JMC A 2017; DOI: 10.1039/C7TA05215D