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conferenceseries
.com
Volume 7
Innovative Energy & Research
ISSN: 2576-1463
Advanced Energy Materials 2018
August 13-14, 2018
August 13-14, 2018 | Dublin, Ireland
20
th
International Conference on
Advanced Energy Materials and Research
Innov Ener Res 2018, Volume 7
DOI: 10.4172/2576-1463-C1-003
Influence of Electrodeposited Polypyrrole Layer on the Capacitive Performance of Hybrid NiCo
2
O
4
/
Carbon Fiber Paper Composites
Tae-Hoon Ko
1
, Rai Min-Kang Seo
2
, Hak-Yong Kim
3
and
Byoung-Suhk Kim
4
1,3,4
Chonbuk National University, Republic of Korea
2
Korea institute of Carbon Convergence Technology, Republic of Korea
R
ecently, electrochemical capacitors have been carried out with emphasis on the development of hybrid electroactive
electrode materials, based on metal oxide, carbon materials and conducting polymers. The hybrid NiCo
2
O
4
modified
carbon fiber paper (NiCo
2
O
4
/CFP) composites with different electrodeposited times of polypyrrole (PPy) layers were prepared
by two-step process. At first, NiCo
2
O
4
was prepared by low temperature hydrothemal method. Secondly, PPy layer were
coated onto the NiCo
2
O
4
/CFP composites by using electrochemical deposition method. The potential sweeping between –0.2
to 1.0 V at a scan rate of 50 mV/s was performed for various potential sweeping cycles (0, 5, 10, 15 and 20) in 0.5 M KCl
solution in the presence of pyrrole monomer. SEM images clearly indicated that the NiCo
2
O
4
nanoneedles were uniformly
grown over the CFP. Further, PPy layer was uniformly deposited over the NiCo
2
O
4
/CFP composites. In the present work,
we have fabricated various hybrid NiCo
2
O
4
/CFP composite electrodes with different electrodeposited PPy layers, and the
effects of electrodeposited PPy layer were investigated. The as-prepared NiCo
2
O
4
/CFP composite electrodes with PPy layer
electrodeposited for 15 cycles (NiCo
2
O
4
-PPy15/CFP) showed good electrochemical performance. Further, NiCo
2
O
4
-PPy/CFP
composite electrode was successfully utilized for solid-state high performance supercapacitor applications. It showed high
capacitance value with high energy and power density as well as high rate capability, which were evaluated from galvanostatic
charge-discharge and electrochemical impedance spectroscopy.
Taehoon222@naver.com