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Issue 45, 2015
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Hybrid layer-by-layer composites based on a conducting polyelectrolyte and Fe3O4 nanostructures grafted onto graphene for supercapacitor application

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Abstract

Using the layer-by-layer process, we developed a new and original ternary hybrid material based on magnetite iron oxide raspberry nanostructures, 250–300 nm in size, synthesized directly on few layer graphene (Fe3O4@FLG) alternated with conducting poly(3,4-ethylenedioxy thiophene):poly(styrene sulfonate) (PEDOT:PSS) as the electrode material for supercapacitors. Magnetite based nanostructures were used as electroactive materials. Graphene and PEDOT:PSS ensured the electrical conductivity. PEDOT:PSS also plays the role of a binder conferring cohesion to the hybrid material. Using spin-coating, the step-by-step buildup leads to very regular and well controlled film properties such as the film thickness and the content of iron oxide. The electrochemical properties of the so-obtained hybrid material were investigated in 0.5 M Na2SO3 aqueous electrolyte by cyclic voltammetry, electrochemical impedance spectroscopy and chronopotentiometry. In contradiction with the reported poor capacitance and poor cycling stability of iron oxide based supercapacitors, hybrid Fe3O4@FLG/PEDOT:PSS multilayers provide a high specific capacitance (153 F g−1 at 0.1 A g−1) and a high structural and cycling stability (114% retention after 3500 cycles). This hybrid developed system opens the route for even higher specific capacitance using other types of metal oxides.

Graphical abstract: Hybrid layer-by-layer composites based on a conducting polyelectrolyte and Fe3O4 nanostructures grafted onto graphene for supercapacitor application

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Supplementary files

Article information


Submitted
08 Jul 2015
Accepted
30 Sep 2015
First published
30 Sep 2015

J. Mater. Chem. A, 2015,3, 22877-22885
Article type
Paper

Hybrid layer-by-layer composites based on a conducting polyelectrolyte and Fe3O4 nanostructures grafted onto graphene for supercapacitor application

E. Pardieu, S. Pronkin, M. Dolci, T. Dintzer, B. P. Pichon, D. Begin, C. Pham-Huu, P. Schaaf, S. Begin-Colin and F. Boulmedais, J. Mater. Chem. A, 2015, 3, 22877
DOI: 10.1039/C5TA05132K

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