Hydrothermal express synthesis of CNT/MnO2 composite for asymmetric supercapacitor
- Authors: Gromadskyi D.G.1
- 
							Affiliations: 
							- National Technical University of Ukraine Kyiv Polytechnic Institute
 
- Issue: Vol 52, No 3 (2016)
- Pages: 289-299
- Section: Article
- URL: https://journals.rcsi.science/1068-3755/article/view/229744
- DOI: https://doi.org/10.3103/S1068375516030078
- ID: 229744
Cite item
Abstract
A hydrothermal technique for the express synthesis of a composite based on carbon nanotubes (CNTs) and manganese dioxide by means of the direct reduction of potassium permanganate from an aqueous isopropanol solution is proposed in this work. The synthesis conditions (time, temperature, ratios between reagents) are optimized; the primary and secondary processes taking place in the system are considered in detail. The synthesized CNT/MnO2 composite is studied with the help of a wide range of physicochemical and electrochemical methods to assess the possibility of its use as a positively charged electrode of an asymmetric supercapacitor (SC). The assembled SC cell based on this composite and an activated carbon (AC) electrode has fairly high power typical of conventional electric double-layer capacitors (0.82 kW/kg) with a twofold increase in the energy density (12.14 W h/kg).
About the authors
D. G. Gromadskyi
National Technical University of Ukraine Kyiv Polytechnic Institute
							Author for correspondence.
							Email: d.gromadskyi@gmail.com
				                					                																			                												                	Ukraine, 							pr. Peremohy 37, Kyiv, 03056						
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