Facilitated ion transport in all-solid-state flexible supercapacitors

Bong Gill Choi, Jinkee Hong, Won Hi Hong, Paula T. Hammond, Hoseok Park

Research output: Contribution to journalArticle

327 Citations (Scopus)

Abstract

The realization of highly flexible and all-solid-state energy-storage devices strongly depends on both the electrical properties and mechanical integrity of the constitutive materials and the controlled assembly of electrode and solid electrolyte. Herein we report the preparation of all-solid-state flexible supercapacitors (SCs) through the easy assembly of functionalized reduced graphene oxide (f-RGO) thin films (as electrode) and solvent-cast Nafion electrolyte membranes (as electrolyte and separator). In particular, the f-RGO-based SCs (f-RGO-SCs) showed a 2-fold higher specific capacitance (118.5 F/g at 1 A/g) and rate capability (90% retention at 30 A/g) compared to those of all-solid-state graphene SCs (62.3 F/g at 1A/g and 48% retention at 30 A/g). As proven by the 4-fold faster relaxation of the f-RGO-SCs than that of the RGO-SCs and more capacitive behavior of the former at the low-frequency region, these results were attributed to the facilitated ionic transport at the electrical double layer by means of the interfacial engineering of RGO by Nafion. Moreover, the superiority of all-solid-state flexible f-RGO-SCs was demonstrated by the good performance durability under the 1000 cycles of charging and discharging due to the mechanical integrity as a consequence of the interconnected networking structures. Therefore, this research provides new insight into the rational design and fabrication of all-solid-state flexible energy-storage devices as well as the fundamental understanding of ion and charge transport at the interface.

Original languageEnglish
Pages (from-to)7205-7213
Number of pages9
JournalACS Nano
Volume5
Issue number9
DOIs
Publication statusPublished - 2011 Sep 27

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electrochemical capacitors
Graphite
Graphene
Ions
graphene
solid state
Oxides
ions
oxides
electrolytes
energy storage
integrity
Energy storage
Electrolytes
assembly
Electrodes
electrodes
Solid electrolytes
solid electrolytes
separators

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Choi, B. G., Hong, J., Hong, W. H., Hammond, P. T., & Park, H. (2011). Facilitated ion transport in all-solid-state flexible supercapacitors. ACS Nano, 5(9), 7205-7213. https://doi.org/10.1021/nn202020w
Choi, Bong Gill ; Hong, Jinkee ; Hong, Won Hi ; Hammond, Paula T. ; Park, Hoseok. / Facilitated ion transport in all-solid-state flexible supercapacitors. In: ACS Nano. 2011 ; Vol. 5, No. 9. pp. 7205-7213.
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Choi, BG, Hong, J, Hong, WH, Hammond, PT & Park, H 2011, 'Facilitated ion transport in all-solid-state flexible supercapacitors', ACS Nano, vol. 5, no. 9, pp. 7205-7213. https://doi.org/10.1021/nn202020w

Facilitated ion transport in all-solid-state flexible supercapacitors. / Choi, Bong Gill; Hong, Jinkee; Hong, Won Hi; Hammond, Paula T.; Park, Hoseok.

In: ACS Nano, Vol. 5, No. 9, 27.09.2011, p. 7205-7213.

Research output: Contribution to journalArticle

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AU - Hong, Jinkee

AU - Hong, Won Hi

AU - Hammond, Paula T.

AU - Park, Hoseok

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