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Article

An Approach to Solid-State Electrical Double Layer Capacitors Fabricated with Graphene Oxide-Doped, Ionic Liquid-Based Solid Copolymer Electrolytes

by
N. F. A. Fattah
,
H. M. Ng
,
Y. K. Mahipal
,
Arshid Numan
,
S. Ramesh
* and
K. Ramesh
Centre for Ionics Universiti Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
*
Author to whom correspondence should be addressed.
Materials 2016, 9(6), 450; https://doi.org/10.3390/ma9060450
Submission received: 25 March 2016 / Revised: 21 May 2016 / Accepted: 30 May 2016 / Published: 6 June 2016
(This article belongs to the Section Energy Materials)
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Abstract

Solid polymer electrolyte (SPE) composed of semi-crystalline poly (vinylidene fluoride-hexafluoropropylene) [P(VdF-HFP)] copolymer, 1-ethyl-3-methylimidazolium bis (trifluoromethyl sulphonyl) imide [EMI-BTI] and graphene oxide (GO) was prepared and its performance evaluated. The effects of GO nano-filler were investigated in terms of enhancement in ionic conductivity along with the electrochemical properties of its electrical double layer capacitors (EDLC). The GO-doped SPE shows improvement in ionic conductivity compared to the P(VdF-HFP)-[EMI-BTI] SPE system due to the existence of the abundant oxygen-containing functional group in GO that assists in the improvement of the ion mobility in the polymer matrix. The complexation of the materials in the SPE is confirmed in X-ray diffraction (XRD) and thermogravimetric analysis (TGA) studies. The electrochemical performance of EDLC fabricated with GO-doped SPE is examined using cyclic voltammetry and charge–discharge techniques. The maximum specific capacitance obtained is 29.6 F∙g−1, which is observed at a scan rate of 3 mV/s in 6 wt % GO-doped, SPE-based EDLC. It also has excellent cyclic retention as it is able keep the performance of the EDLC at 94% even after 3000 cycles. These results suggest GO doped SPE plays a significant role in energy storage application.
Keywords: copolymer; graphene oxide; electrical double layer capacitor; ionic liquid copolymer; graphene oxide; electrical double layer capacitor; ionic liquid

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MDPI and ACS Style

Fattah, N.F.A.; Ng, H.M.; Mahipal, Y.K.; Numan, A.; Ramesh, S.; Ramesh, K. An Approach to Solid-State Electrical Double Layer Capacitors Fabricated with Graphene Oxide-Doped, Ionic Liquid-Based Solid Copolymer Electrolytes. Materials 2016, 9, 450. https://doi.org/10.3390/ma9060450

AMA Style

Fattah NFA, Ng HM, Mahipal YK, Numan A, Ramesh S, Ramesh K. An Approach to Solid-State Electrical Double Layer Capacitors Fabricated with Graphene Oxide-Doped, Ionic Liquid-Based Solid Copolymer Electrolytes. Materials. 2016; 9(6):450. https://doi.org/10.3390/ma9060450

Chicago/Turabian Style

Fattah, N. F. A., H. M. Ng, Y. K. Mahipal, Arshid Numan, S. Ramesh, and K. Ramesh. 2016. "An Approach to Solid-State Electrical Double Layer Capacitors Fabricated with Graphene Oxide-Doped, Ionic Liquid-Based Solid Copolymer Electrolytes" Materials 9, no. 6: 450. https://doi.org/10.3390/ma9060450

APA Style

Fattah, N. F. A., Ng, H. M., Mahipal, Y. K., Numan, A., Ramesh, S., & Ramesh, K. (2016). An Approach to Solid-State Electrical Double Layer Capacitors Fabricated with Graphene Oxide-Doped, Ionic Liquid-Based Solid Copolymer Electrolytes. Materials, 9(6), 450. https://doi.org/10.3390/ma9060450

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