Composite films prepared by immersion deposition of manganese oxide in carbon nanotubes grown on graphite for supercapacitors |
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Authors: | Lingchuan Li and Khalid Lafdi |
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Affiliation: | (1) University of Dayton Research Institute, 300 College Park, Dayton, OH 45469, USA |
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Abstract: | Manganese oxide/carbon nanotube (CNT) composite films on graphite were prepared by growing CNTs on the substrate using chemical
vapor deposition (CVD), followed by immersion in an aqueous solution of potassium permanganate. The CVD growth created favorable
conditions for deposition of the oxide on the electrode, and an aligned porous structure of the composite films, which originated
from the CNT growth, could be managed. Electrochemical behaviors of the CNT and the composite films for supercapacitors were
studied in 1 M Na2SO4 solution. While the oxide deposition in the CNT films was identified as contributing to capacitance enhancement, it was also
found that a mild heat treatment could improve performance of the composite films. |
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