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.com
Volume 9
Journalof Nanomedicine&Nanotechnology
Asia Pacific Nano Congress 2018
August 10-11, 2018
August 10-11, 2018 Osaka, Japan
2
nd
World Congress on
Nanoscience and Nanotechnology
Enhancement of electrochemical performance of Co
3
O
4
at Ni foam electrode using redox-additive
electrolyte
Ganesh Dhakal, Awais Ali and Jae-Jin Shim
Yeungnam University, Republic of Korea
W
ith 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, Co
3
O
4
at nickel foam carrying plate-like (Co
3
O
4
-P) and grass-
like (Co
3
O
4
-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 (Co
3
O
4
-G) favors the superior electrochemical performance as
compared to those plates like structure (Co
3
O
4
-P) in KOH. Furthermore, we have improved the electrochemical performance
of the Co
3
O
4
-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 Co
3
O
4
-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.
gdhakal17@gmail.comGanesh Dhakal et al., J Nanomed Nanotechnol 2018, Volume 9
DOI: 10.4172/2157-7439-C6-082