Growth of PANI thin layer on MoS2 nanosheet with high electro-capacitive property for symmetric supercapacitor

Creating unique nanostructures is imperative to develop new generation of electrodes with high electro-capacitive property. Herein the molybdenum disulfide/polyaniline (MoS₂/PANI) composites with different PANI loadings (40, 53, and 70 wt%) were prepared using MoS₂ nanosheet as the substrate. At a 53 wt% loading amount of PANI, the obtained MoS₂/PANI-53 nanopallet electrode material displayed the highest electro-capacitive property. The rational combination of the two components allowed the PANI thin layer to uniformly cover the surface of the MoS₂ nanosheet and the synergistic effect of the high specific capacitance of PANI along with the fast ionic conductivity and mechanical stability of MoS₂ make MoS₂/PANI-53 as a suitable electrode material for supercapacitors. Therefore the MoS₂/PANI-53 nanopallet symmetric supercapacitor delivered high energy density (35 Wh kg⁻¹ at the power density of 335 W kg⁻¹) and excellent cycling stability (81% capacitance retention after 8000 cycles). This work could be give rise to conducting polymer based composite electrode material with high performance for functional supercapacitor devices.