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Indirect Transformation of Coordination-Polymer Particles into Magnetic Carbon-Coated Mn3O4 (Mn3O4@C) Nanowires for Supercapacitor Electrodes with Good Cycling Performance.
- Source :
- Chemistry - A European Journal; May2013, Vol. 19 Issue 22, p7084-7089, 6p
- Publication Year :
- 2013
-
Abstract
- Carbon-coated Mn<subscript>3</subscript>O<subscript>4</subscript> nanowires (Mn<subscript>3</subscript>O<subscript>4</subscript>@C NWs) have been synthesized by the reduction of well-shaped carbon-coated bixbyite networks and characterized by TEM, X-ray diffraction, X-ray photoelectron spectroscopy, and electrochemical experiments. To assess the properties of 1D carbon-coated nanowires for their use in supercapacitors, cyclic voltammetry and galvanostatic charging-discharging measurements were performed. Mn<subscript>3</subscript>O<subscript>4</subscript>@C NWs could be charged and discharged faster and had higher capacitance than bare Mn<subscript>3</subscript>O<subscript>4</subscript> nanostructures and other commercial materials. The capacitance of the Mn<subscript>3</subscript>O<subscript>4</subscript>@C NWs was 92 % retained after 3000 cycles at a charging rate of 5 A g<superscript>−1</superscript>. This improvement can be attributed to the carbon shells, which promote fast Faradaic charging and discharging of the interior Mn<subscript>3</subscript>O<subscript>4</subscript> core and also act as barriers to protect the inner core. These Mn<subscript>3</subscript>O<subscript>4</subscript>@C NWs could be a promising candidate material for high-capacity, low-cost, and environmentally friendly electrodes for supercapacitors. In addition, the magnetic properties of the as-synthesized samples are also reported to investigate the influence of the carbon coating. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09476539
- Volume :
- 19
- Issue :
- 22
- Database :
- Complementary Index
- Journal :
- Chemistry - A European Journal
- Publication Type :
- Academic Journal
- Accession number :
- 87623129
- Full Text :
- https://doi.org/10.1002/chem.201300188