Optically active polymer nanocomposite composed of polyaniline, polyacrylonitrile and green-synthesized graphene quantum dot for supercapacitor application

摘要: Abstract Development of stable and optically active composite film that can show efficient supercapacitor activity is a challenging research interest in material science. A polymer nanocomposite composed green synthesised graphene quantum dot (GQD, G) doped polyacrylonitrile (PAN) polyaniline (PANI) systems, designated as PAN-PANI@G, have been prepared. The critical loading concentration prepared its effect on the physicochemical, optical electrical analysis were systematically studied detail. PAN-PANI@G showed an appreciable conductivity (2.362 × 10−6 S m−1) absorbance at λmax ~270 nm. Physicochemical characterizations by XRD, FTIR TEM reveal chemical interaction between individual components via intermolecular hydrogen bonding. Analysed particle size GQD membrane was found to be about two times lesser than pure highlighting synergic PAN/PANI matrix. specific capacitance value composites modified screen-printed carbon electrode tested cyclic voltammetric galvanostatic charge-discharge techniques 0.1 M H2SO4 solution. Calculated values applied current density, 670 mA g−1 are range 105–587 F g−1 cm−2 which approximately 2–1300 higher reported for polypyrrole based literature. As preliminary extension this study, optimal PAN/PANI@G loading, 1.5 wt% extended prototype cell application combination with dilute solution NaCl along suitable conducting plates. When 3 V DC power supplied 4 min, produced operating voltage 1.4 V 1 h time.