Chiama, S.L. and Lim, H.N. and Foo, C.Y. and Pandikumar, A. and Huang, N.M. (2017) How Did Nickel Cobaltite Reinforced Carbon Microfibre Symmetrical Supercapacitor Fare Against A Commercial Supercapacitor? Electrochimica Acta, 246. pp. 1141-1146. ISSN 0013-4686

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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 124.21 F/g and 44.49 F/g at 1 A/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 489.25 W/kg, respectively, while those of KEMEX were 2.07 Wh/kg and 409.45 W/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.

Item Type: Article
Uncontrolled Keywords: Electrospinning;nickel cobaltite;carbon microfibre;supercapacitor
Subjects: Electrodics and Electrocatalysis
Electrochemical Power Sources
Depositing User: Dr. N Meyyappan
Date Deposited: 10 May 2019 11:19
Last Modified: 10 May 2019 11:19

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