Fabrication of polyaniline-few-layer MoS2 nanocomposite for high energy density supercapacitors.

Polyaniline-few-layer molybdenum disulfide nanocomposite (PANI-MoS₂) has been synthesized by in situ polymerization of aniline over MoS₂ using HCl as the dopant. X-ray crystallographic studies show the characteristic peaks of few-layered MoS₂ in the PANI matrix. The changes in Raman and UV-Vis spectra have proved that there are definite interactions between PANI and few-layer MoS₂.PANI-MoS₂ nanocomposite as an electrode material for supercapacitor exhibits a maximum specific capacitance of 687 Fg⁻¹ at a scan rate of 5 mVs⁻¹ using cyclic voltammetry (CV) and a C_sp of 612 Fg⁻¹ at a current density of 0.2 Ag⁻¹ using chronopotentiometry (CP). Further, the material also exhibits a high energy density of 128 Wh kg⁻¹with a maximum power density of 9.8 kW kg⁻¹ and a tremendous cyclic stability with 93% capacitance retention after 2000 cycles. These superior electrochemical results over bare PANI and MoS₂ showed the PANI-MoS₂ nanocomposites to be a capable electrode material for energy storage systems. [ABSTRACT FROM AUTHOR]