Homogeneous Fe2 O3 coatings on carbon nanotube structures for supercapacitors

Dalton Transactions : an International Journal of Inorganic Chemistry
Pengmei YuEnric Bertran Serra

Abstract

The combination of carbon nanotubes with transition metal oxides can exhibit complementary charge storage properties for use as electrode materials for next generation energy storage devices. One of the biggest challenges so far is to synthesize homogeneous oxide coatings on carbon nanotube structures preserving their integrity. Here we present the formation of conformal coatings of Fe2O3 on vertically aligned carbon nanotubes obtained by atomic layer deposition. We investigate the effect of pristine, nitrogen plasma and water plasma treated carbon nanotube surfaces on the ALD-growth of Fe2O3 using ferrocene and ozone precursors. The surface morphology, coating thickness, microstructure and surface chemistry of iron oxide-carbon nanotube composites and their ultimate influence on the electrochemical behavior of the composites are evaluated. The most effective surface functionalization is that achieved by H2O plasma treatment, whereas untreated carbon nanotubes, despite the lack of active sites in the starting pristine surface, can be coated with an inhomogeneous Fe2O3 film.

References

Mar 14, 2008·Angewandte Chemie·Peter G BruceJean-Marie Tarascon
Feb 4, 2009·Nano Letters·Arava Leela Mohana ReddyPulickel M Ajayan
Jul 9, 2009·ACS Nano·Charan MasarapuBingqing Wei
Sep 6, 2012·Nanotechnology·S HussainE Bertran
Sep 8, 2016·Nature Communications·Maria R LukatskayaYury Gogotsi

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Methods Mentioned

BETA
atomic layer deposition
scanning
transmission electron microscopy
X-ray

Software Mentioned

ZVIEW

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