Supercapacitors based on composites of PANI with nanosheets of nitrogen-doped RGO, BC 1.5 N, MoS 2 and WS 2

Performance of supercapacitors based on 1:1 (by weight) composites of polyaniline (PANI) with nanosheets of nitrogenated reduced graphene oxide (NRGO), BC1.5N, MoS2 and WS2 has been investigated in detail. The highest specific capacitance is found with the 1:1 NRGO-PANI composite, the value being 561F/g at a current density of 0.2A/g. All the 1:1 nanocomposites show good cyclability. Increasing the PANI content increases the specific capacitance and the highest value found being 715F/g at a current density of 0.5A/g in the case of the 1:6 NRGO-PANI composite. However, all the 1:6 composites show a marked decrease in specific capacitance with increase in current density. The energy density of 1:6 NRGO-PANI is ~25Wh/Kg at 0.5A/g and 1:1 NRGO-PANI is ~19Wh/Kg at 0.2A/g. NRGO-PANI composites clearly stand out as viable materials for practical applications.