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Synthesis of Nanostructured Fibers Consisting of Carbon Coated Mn3O4 Nanoparticles and Their Application in Electrochemical Capacitors

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Nanostructured composite fibers consisting of carbon coated Mn3O4 nanoparticles (Mn3O4@C) were prepared from thermal decomposition of manganese alginate fibers produced by wet-spinning technique, and investigated with SEM, TEM, XRD, nitrogen adsorption–desorption isotherms, and electrochemical tests toward energy storage. It is found that the as-obtained Mn3O4@C fibers consist of plenty of nano-sized Mn3O4 crystals with even diameter of 10–15 nm and carbon coating layer with a thickness of 1–2 nm. The composite fibers exhibit also a porous structure consisting of both micropores and mesopores. The electrochemical performances of Mn3O4@C fibers were examined by cyclic voltammetry and galvanostatic charge–discharge techniques. The results indicate that Mn3O4@C fibers possess a higher specific capacitance and superior rate capability when used as electrode materials for supercapacitor compared with commercial Mn3O4. The improved performances of Mn3O4@C fibers can be attributed to the nano-dimension of Mn3O4 particles, the thin carbon coating layer and the nanopores existing among Mn3O4@C nanoparticles.
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Document Type: Research Article

Publication date: 01 December 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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