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

• Published in: Polymer bulletin (Berlin, Germany) Germany), 2018-10, Vol.75 (10), p.4359-4375
• Main Authors: Raghu, M. S., Kumar, K. Yogesh, Rao, Srilatha, Aravinda, T., Prasanna, B. P., Prashanth, M. K.
• Format: Article
• Language: English
• Subjects: Aniline; Capacitance; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Complex Fluids and Microfluidics; Composite materials; Crystallography; Electrode materials; Electrodes; Energy storage; Graphene; Maximum power density; Microscopy; Molybdenum disulfide; Nanocomposites; Organic Chemistry; Original Paper; Oxidation; Physical Chemistry; Polyanilines; Polymer Sciences; Polymerization; Polymers; Soft and Granular Matter; Spectrum analysis; Storage systems; Sulfur; Supercapacitors
• ISSN: 0170-0839; 1436-2449
• DOI: 10.1007/s00289-017-2267-9

Polyaniline–few-layer molybdenum disulfide nanocomposite (PANI–MoS 2 ) has been synthesized by in situ polymerization of aniline over MoS 2 using HCl as the dopant. X-ray crystallographic studies show the characteristic peaks of few-layered MoS 2 in the PANI matrix. The changes in Raman and UV–Vis spectra have proved that there are definite interactions between PANI and few-layer MoS 2 .PANI–MoS 2 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 −1 with 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 MoS 2 showed the PANI–MoS 2 nanocomposites to be a capable electrode material for energy storage systems.