A novel interlocked Prussian blue/reduced graphene oxide nanocomposites as high-performance supercapacitor electrodes

A novel interlocked Prussian blue/reduced graphene oxide nanocomposites as high-performance... High-quality Prussian blue/reduced graphene oxide (PB/rGO) nanohybrids were synthesized via a simple polyvinylpyrrolidone (PVP)-assisted polyol reduction method under mild conditions. The structure and composition of PB/rGO were confirmed by means of X-ray diffraction (XRD), electron microscopes (SEM and transmission electron microscopy (TEM)), Fourier transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS). These results indicate that ratios of starting materials allow a good control on loading and morphology of PB/graphene hybrids, and at ratio of K3Fe(CN)6/GO of 1:2, PB nanocubes get completely embedded into the defect of porous graphene matrices. Electrochemcial characterization of the PB/rGO nanocomposites with different PB/rGO weight ratios was carried out by cyclic voltammograms and galvanostatic charge–discharge in 1.0 M KNO3 electrolyte. The PB/rGO nanocomposites exhibit much higher specific capacitances than either bare PB nanocrystals or pure rGO sheets. PB/rGO (1:2) exhibits the highest specific capacitance of 251.6 F g−1 at a scan rate of 10 mV s−1 and an excellent cycling stability along with 92 % specific capacitance retained after 1000 cycle tests. The significant enhancement in electrochemical performance over PB/rGO nanocomposites can be attributed to a positive synergetic effect that the PB nanocube interlocked dispersion of rGO sheets superimposes pseudocapacitance from PB on double-layer capacitance from rGO sheets. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Solid State Electrochemistry Springer Journals

A novel interlocked Prussian blue/reduced graphene oxide nanocomposites as high-performance supercapacitor electrodes

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Publisher
Springer Journals
Copyright
Copyright © 2015 by Springer-Verlag Berlin Heidelberg
Subject
Chemistry; Physical Chemistry; Electrochemistry; Energy Storage; Characterization and Evaluation of Materials; Analytical Chemistry; Condensed Matter Physics
ISSN
1432-8488
eISSN
1433-0768
D.O.I.
10.1007/s10008-015-2785-z
Publisher site
See Article on Publisher Site

Abstract

High-quality Prussian blue/reduced graphene oxide (PB/rGO) nanohybrids were synthesized via a simple polyvinylpyrrolidone (PVP)-assisted polyol reduction method under mild conditions. The structure and composition of PB/rGO were confirmed by means of X-ray diffraction (XRD), electron microscopes (SEM and transmission electron microscopy (TEM)), Fourier transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS). These results indicate that ratios of starting materials allow a good control on loading and morphology of PB/graphene hybrids, and at ratio of K3Fe(CN)6/GO of 1:2, PB nanocubes get completely embedded into the defect of porous graphene matrices. Electrochemcial characterization of the PB/rGO nanocomposites with different PB/rGO weight ratios was carried out by cyclic voltammograms and galvanostatic charge–discharge in 1.0 M KNO3 electrolyte. The PB/rGO nanocomposites exhibit much higher specific capacitances than either bare PB nanocrystals or pure rGO sheets. PB/rGO (1:2) exhibits the highest specific capacitance of 251.6 F g−1 at a scan rate of 10 mV s−1 and an excellent cycling stability along with 92 % specific capacitance retained after 1000 cycle tests. The significant enhancement in electrochemical performance over PB/rGO nanocomposites can be attributed to a positive synergetic effect that the PB nanocube interlocked dispersion of rGO sheets superimposes pseudocapacitance from PB on double-layer capacitance from rGO sheets.

Journal

Journal of Solid State ElectrochemistrySpringer Journals

Published: Feb 22, 2015

References

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