MRS Proceedings

Articles

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

2012 MRS Spring Meeting.

G. P. Pandeya1 and A. C. Rastogia1a2

a1 Center for Autonomous Solar Power (CASP), Binghamton University, State University of New York, Binghamton, NY, 13902, USA

a2 Department of Electrical and Computer Engineering, Binghamton University, State University of New York, Binghamton, NY, 13902, USA

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.

Key Words:

  • ionic conductor;
  • C;
  • storage
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