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Graphene-Based All-Solid-State Supercapacitor with Ionic Liquid Gel Polymer Electrolyte

Published online by Cambridge University Press:  20 July 2012

G. P. Pandey  and
A. C. Rastogi
G. P. Pandey
Affiliation:
Center for Autonomous Solar Power (CASP), Binghamton University, State University of New York, Binghamton, NY, 13902, USA
A. C. Rastogi
Affiliation:
Center for Autonomous Solar Power (CASP), Binghamton University, State University of New York, Binghamton, NY, 13902, USA Department of Electrical and Computer Engineering, Binghamton University, State University of New York, Binghamton, NY, 13902, USA
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Abstract

Graphene-based all-solid-state supercapacitors the using ionic liquid gel polymer electrolyte have been fabricated and characterized. The gel polymer electrolyte has been prepared by immobilizing ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate (BMIBF4) with poly(vinylidene fluoride-hexafluoropropylene). Cyclic voltammetry studies show highly capacitive behavior under fast scan rates. Impedance analysis show nominal charge transfer and ion diffusion at pores related resistance contributions. The graphene-based solid-state supercapacitor shows optimum capacitance of 80 mF cm-2 (equivalent to the single electrode specific capacitance of 76 F g-1). This corresponded to the specific energy of 7.4 Wh kg-1 and specific power of 4.5 kW kg-1. The supercapacitor cell shows stable cyclic performances for up to 5000 cycles and possibly beyond.

Keywords

ionic conductorCstorage
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1440: Symposium O – Next-Generation Energy Storage Materials and Systems , 2012 , mrss12-1440-o04-05
Copyright
Copyright © Materials Research Society 2012

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