Development of high-performance supercapacitor using faceted ZIF-67 MOF synthesized by facile chemical route

Supercapacitors with meritorious characteristics like high-power density and long cyclic stability have recently grabbed wide research attention. Between traditional capacitors and rechargeable batteries, supercapacitors represent a new type of energy storage device. ZIF-67 Metal-organic framework synthesized simply by facile chemical route. The ZIF-67 MOF was characterized using X-ray Diffraction, UV-visible spectroscopy, Fourier-transform Infrared Spectroscopy, and Atomic Force Microscopy. The present investigations deal with the electrochemical (CV, EIS, GCD) performance of fabricated ZIF-67 electrodes in 2 M, 4 M, and 6 M KOH electrolyte solutions in the potential window of 0 - 0.5 V. The electrode shows efficient results in 6 M KOH with a specific capacitance value of 164 Fg−1 at a scan rate of 10 mVs−1 compared to 72 Fg−1 and 99.8 Fg−1 for 2 M and 4 M, respectively. The ZIF-67 MOF electrodes show up to 95% retention over the 500 repeated charge−discharge cycles. This method facilitates a simple approach to the synthesis of ZIF-67 MOF and its applicability as an energy device.