Dr. Ganesh Dhakal
Yeungnam University, Republic of Korea
Title: Enhancement of electrochemical performance of Co3O4@Ni foam electrode using redox-additive electrolyte
Biography
Biography: Dr. Ganesh Dhakal
Abstract
With the development of the science and technology, people in era are more fascinated to use the portable, highly efficient, and safe electronic device. To fulfill all this demand of the growing population in a single device is a challenging issue and is limited by the energy storage device. Among the energy storage device, supercapacitor are emerging energy storage device due to their distinctive features of rapid charging and discharging process, long cycle life, high specific power, low maintenance and environmental friendly. So to address this issue, Co3O4@ nickel foam carrying plate-like (Co3O4-P) and grass-like (Co3O4-G) morphologies were prepared as the binder-free supercapacitor electrode materials by varying temperature. The physicochemical properties of as-prepared electrodes are characterized using scanning electron microscopy, High-resolution transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy. For the first time, we tested the electrochemical performance of the electrodes using redox additive electrolyte (RAE). The homogeneously grown grass like microstructure (Co3O4-G) favors the superior electrochemical performance as compared to those plates like structure (Co3O4-P) in KOH. Furthermore, we have improved the electrochemical performance of the Co3O4-G by using a redox-additive electrolyte in KOH solution. Remarkably, just by varying the concentration of the RAE in KOH, the specific capacitance of Co3O4-G increased by 4-fold. Irrespective of the various morphology of the electrode materials under investigation, the concentration of RAE plays a vital role in influencing the electrochemical performance of the system.