Bulk production of zinc doped reduced graphene oxide from tire waste for supercapacitor application: Computation and experimental analysis. (September 2022) - Tatrari, Gaurav
Abstract: Traditional solutions for the recycling of waste tires result in several environmental complications and lethal health risks. Equally, the requirements for low-cost, eco-friendly, and energy-efficient energy storage devices are gradually increasing with the global population burst. As an effective solution herein, we report a novel process for mass scale synthesis of zinc-dopes fibrous reduced graphene oxide spheres (ZGS) using waste tires as a resource through an environment-friendly double step pyrolysis approach. Density functional theory (DFT) analysis reveals a peak quantum capacitance of 59.63 μF cm −2 at −0.38 V for ZGS, which is about 5.5 times more in comparison to the pristine graphene. Moreover, the electrochemical performance of the ZGS-based supercapacitor device shows an outstanding power density of 3325 W kg −1 at a current density of 2 A g −1 and an excellent energy density of 36.94 Wh Kg −1 at a current density of 2 A g −1 with a high specific capacitance of 316.00 F g −1 at the scan rate of 5 m Vs −1 . Furthermore, our analysis depicts a link between industrial symbiosis (IS), circular economy (CE), and sustainable development (SD). Highlights: A mass-scale synthesis of high-quality zinc-doped reduced graphene oxide using tire waste as a precursor. DFT analysis showed a peak quantum capacitance of 59.63 μFcm −2 at −0.38 V for ZGS, which is about 5.5 times more in comparison to pristine graphene. A power density of 4996 Wkg −1 and an energy density of 36.94 WhKg −1 at a current density of 2 Ag −1 along with a high specific capacitance of 316 Fg −1 at 5 mVs −1 has been reported. Over 85% cycle stability up to 5000 cycles.