Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume -, Issue 2, Pages 137-142Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201700836
Keywords
Nanotubes; Carbon; Hybrid materials; Zinc; Supercapacitors
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Funding
- Science and Engineering Research Board (SERB) of the Department of Science and Technology (DST-SERB), Govt. of India [SB/S2/CMP/032/2013, 4/06/2013]
- Visvesvaraya National Institute of Technology (VNIT), Nagpur
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Recently, thin-film supercapacitors have received much interest because they can achieve both high energy densities and high power densities, which make them suitable for practical applications. Here, thin films consisting of zinc ferrite (ZnFe2O4) anchored on multiwalled carbon nanotubes (CNT) were prepared through a simple and inexpensive successive ionic layer adsorption and reaction (SILAR) method. This method has the advantage of direct electrode formation without the use of any binder. The synergy of the composite electrode (ZnFe2O4-CNT) yields a high specific capacity of 217 mAhg(-1) at 5 mVs(-1), which is realized by contributions from the inner and outer active surfaces of the hybrid ZnFe2O4-CNT electrode. Furthermore, a solid-state symmetric device exhibits a highest specific energy of 12.80 Whkg(-1) and a specific power of 377.86 Wkg(-1), which clearly demonstrates that our hybrid ZnFe2O4-CNT electrode is promising and innovative for energy-storage applications.
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