How Did Nickel Cobaltite Reinforced Carbon Microfibre Symmetrical Supercapacitor Fare Against A Commercial Supercapacitor?

Various types of supercapacitor electrodes have been reported, which include carbon materials, metal oxides, and conducting polymers. They have been subjected to electrochemical analyses using three- or two-electrode systems. The closest system to a real commercial application is the two-electrode s...

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Bibliographic Details
Published in:Electrochimica acta 2017-08, Vol.246, p.1141-1146
Main Authors: Chiam, S.L., Lim, H.N., Foo, C.Y., Pandikumar, A., Huang, N.M.
Format: Article
Language:English
Subjects:
Capacitance
Carbon
carbon microfibre
Conducting polymers
Electrodes
Electrospinning
Life cycles
Nickel
nickel cobaltite
Polymers
Stability analysis
Studies
supercapacitor
Supercapacitors
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Summary:Various types of supercapacitor electrodes have been reported, which include carbon materials, metal oxides, and conducting polymers. They have been subjected to electrochemical analyses using three- or two-electrode systems. The closest system to a real commercial application is the two-electrode system. Herein, we report the fabrication of a solid-state supercapacitor with nickel cobaltite reinforced carbon microfibre electrodes using two electrode system. This supercapacitor, called the NICAF, was compared to a commercial supercapacitor (KEMEX). The specific capacitances of NICAF and KEMEX were 124.21F/g and 44.49F/g at 1A/g, respectively. The capacitance retention of NICAF was 93% after 900 galvanostatic charge/discharge cycles, whereas KEMEX was able to retain 99% after the same number of cycles. The energy and power densities of NICAF were 8.32 Wh/kg and 489.25W/kg, respectively, while those of KEMEX were 2.07 Wh/kg and 409.45W/kg, respectively. The life cycles of NICAF and KEMEX were verified and compared at three temperature ranges: 0, 30, and 60°C. KEMEX exhibited superior cycle stability, with a capacitance retention of up to 99% in all temperature ranges, whereas NICAF performed optimally by recording up to 97% retention at 0°C. However, the increase in temperature up to 30°C reduced the stability to 93% and a further increase to 60°C disrupted the stability test. Nevertheless, these extensive electrochemical analyses showed that the overall performance of NICAF was comparable to that of the commercially available KEMEX supercapacitor.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2017.06.132