Synthesis of r-GO-incorporated CoWO4 nanostructure for high-performance supercapattery applications

The avant-garde supercapatteries have received substantial curiosity for their noteworthy electrochemical performance. Devising battery-type substances with appreciable electrocapacitive accomplishment and high electrical transmittance is imperative to boost the energy stowing knack of supercapattery devices. A pure CoWO4 nanostructure and a composite of CoWO4 incorporating r-GO were prepared by hydrothermal method. The XRD and FTIR results validated the effective development of high-quality CoWO4 and r-GO. FESEM images reveal a nanosphere-like architecture of CoWO4 over r-GO sheets. The pure and composite nanomaterials show good battery-like traits in electrochemical studies. The CoWO4/r-GO electrode exhibits better electrochemical activity compared to pure sample. The specific capacitance (and specific charge capacity) calculated at a current density of 2 A g−1 for CWO/r-GO and CWO is 382.7 A g−1 (158.1 C g−1) and 262.7 A g−1 (105.1 C g−1), respectively. The results obtained herein evince that the developed nanocomposite is a propitious electrode candidate for supercapattery.