Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 498, Issue -, Pages 202-209Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2017.03.013
Keywords
Hydrothermal method; MnO2; Supercapacitor; Thin film; Weirds
Categories
Funding
- Human Resources Development program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea government Ministry of Trade, Industry and Energy [20124010203180]
- Basic Science Research Program through the 'National Research Foundation of Korea' - 'South Korea' (NRF) - Ministry of Science, ICT and Future Planning [NRF-2015R1A2A2A01006856]
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The mesoporous nanostructured metal oxides have a lot of capabilities to upsurge the energy storing capacity of the supercapacitor. In present work, different nanostructured morphologies of MnO2 have been successfully fabricated on flexible carbon cloth by simple but capable hydrothermal method at different deposition temperatures. The deposition temperature has strong influence on reaction kinetics, which subsequently alters the morphology and electrochemical performance. Among different nanostructured MnO2 thin films, the mesoporous weirds composed thin film obtained at temperature of 453 K exhibits excellent physical and electrochemical features for supercapacitor application. The weirds composed MnO2 thin film exhibits specific surface area of 109 m(2) g(-1), high specific capacitance of 595 F g(-1) with areal capacitance of 4.16 F cm(-2) at a scan rate of 5 mV s(-1) and high specific energy of 56.32 W h kg(-1). In addition to this, MnO2 weirds attain capacity retention of 87 % over 2000 CV cycles, representing better cycling stability. The enhanced electrochemical performance could be ascribed to direct growth of highly porous MnO2 weirds on carbon cloth which provide more pathways for easy diffusion of electrolyte into the interior of electroactive material. The as-fabricated electrode with improved performance could be ascribed as a potential electrode material for energy storage devices. (C) 2017 Elsevier Inc. All rights reserved.
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