Performance of Flexible and Binderless Polypyrrole/Graphene Oxide/Zinc Oxide Supercapacitor Electrode in a Symmetrical Two-Electrode Configuration

Chee, W.K.; Lima, H.N.; Harrison, I.; Chong, K.F.; Zainal, Z.; Ng, C.H.; Huange, N.M.

Abstract

A fast and facile approach based on potentiostatic electrochemical polymerization was used to prepare a polypyrrole/graphene oxide/zinc oxide (PPy/GO/ZnO) nanocomposite deposited on a flexible nickel foam. Fourier transform infrared spectroscopy and energy dispersive X-ray spectroscopy revealed the presence of zinc oxide on the PPy/GO/ZnO nanocomposite. A supercapacitor was fabricated by sandwiching a filter paper immersed in a sodium sulfate solution between two nickel foam electrodes coated with the PPy/GO/ZnO nanocomposite. The electrochemical performance of the supercapacitor was characterized using a two-electrode configuration, and the cyclic voltammetry curve recorded at a fast scan rate of 100 mV/s was pseudo-rectangular. A specific capacitance of 94.6 F/g at a current density of 1 A/g was obtained from constant current charge/discharge measurements. The utilization of the pseudo-capacitive behavior of the polypyrrole and zinc oxide, and the electrical double layer capacitance of the graphene oxide, gave rise to a high energy and power density of 10.65 Wh/kg and 258.26 W/kg at 1 A/g, respectively. The capacitance of the supercapacitor after 1000 galvanostatic charge/discharge cycles was 74% of its original value. The potential application of the as-fabricated supercapacitor in realistic energy delivery systems was demonstrated by its ability to light up a light emitting diode for about 2 minutes after being charged for approximately 30 seconds.

Citation

Chee, W., Lima, H., Harrison, I., Chong, K., Zainal, Z., Ng, C., & Huange, N. (2015). Performance of Flexible and Binderless Polypyrrole/Graphene Oxide/Zinc Oxide Supercapacitor Electrode in a Symmetrical Two-Electrode Configuration. Electrochimica Acta, 157, 88-94. https://doi.org/10.1016/j.electacta.2015.01.080

• Journal Article Type: Article
• Acceptance Date: Jan 18, 2015
• Online Publication Date: Jan 20, 2015
• Publication Date: Mar 1, 2015
• Deposit Date: May 30, 2018
• Journal: Electrochimica Acta
• Print ISSN: 0013-4686
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 157
• Pages: 88-94
• DOI: https://doi.org/10.1016/j.electacta.2015.01.080
• Public URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-84921629545&partnerID=40&md5=b0141e2a02afb58e8c83d27a63fc9f50
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0013468615001000?via%3Dihub