Journal of Nanomedicine & Nanotechnology

Enhancement of electrochemical performance of Co3O4 at Ni foam electrode using redox-additive electrolyte

2^nd World Congress on Nanoscience and Nanotechnology

August 10-11, 2018 Osaka, Japan

Ganesh Dhakal, Awais Ali and Jae-Jin Shim

Yeungnam University, Republic of Korea

Scientific Tracks Abstracts: J Nanomed Nanotechnol

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 is emerging energy storage device due to their distinctive features of rapid charging and discharging process, long cycle life, high specific power, low maintenance and environment friendly. So, to address this issue, Co3O4 at nickel foam carrying plate-like (Co3O4-P) and grasslike (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, highresolution 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 morphologies of the electrode materials under investigation, the concentration of RAE plays a vital role in influencing the electrochemical performance of the system. References 1. R N Bulakhe and J J Shim (2017) Layer-structured nanohybrid MoS2 at rGO on 3D nickel foam for high performance energy storage applications. New Journal of Chemistry; 41: 1473-1482. 2. C Lamiel, Y R Lee, M H Cho, D Tuma and J J Shim (2017) Enhanced electrochemical performance of nickel-cobalt-oxide at reduced graphene oxide//activated carbon asymmetric supercapacitors by the addition of a redox-active electrolyte. Journal of Colloid and Interface Science; 507: 300-309.

Biography :

Ganesh Dhakal is a PhD student in the School of Chemical Engineering, Yeungnam University, Republic of Korea. He is primarily concerned in energy storage devices such as supercapacitors. His research work focuses on enhancing the electrochemical performance of the supercapacitors using different electrolytes.

E-mail: gdhakal17@gmail.com