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Type: Journal article
Title: Low-cost flexible supercapacitors with high-energy density based on nanostructured MnO₂ and Fe₂O₃ thin films directly fabricated onto stainless steel
Other Titles: Low-cost flexible supercapacitors with high-energy density based on nanostructured MnO(2) and Fe(2)O(3) thin films directly fabricated onto stainless steel
Author: Gund, G.
Dubal, D.
Chodankar, N.
Cho, J.
Gomez-Romero, P.
Park, C.
Lokhande, C.
Citation: Scientific Reports, 2015; 5(1):12454-1-12454-13
Publisher: Nature Publishing Group
Issue Date: 2015
ISSN: 2045-2322
Statement of
Girish S. Gund, Deepak P. Dubal, Nilesh R. Chodankar, Jun Y. Cho, Pedro Gomez-Romero, Chan Park and Chandrakant D. Lokhande
Abstract: The facile and economical electrochemical and successive ionic layer adsorption and reaction (SILAR) methods have been employed in order to prepare manganese oxide (MnO2) and iron oxide (Fe2O3) thin films, respectively with the fine optimized nanostructures on highly flexible stainless steel sheet. The symmetric and asymmetric flexible-solid-state supercapacitors (FSS-SCs) of nanostructured (nanosheets for MnO2 and nanoparticles for Fe2O3) electrodes with Na2SO4/Carboxymethyl cellulose (CMC) gel as a separator and electrolyte were assembled. MnO2 as positive and negative electrodes were used to fabricate symmetric SC, while the asymmetric SC was assembled by employing MnO2 as positive and Fe2O3 as negative electrode. Furthermore, the electrochemical features of symmetric and asymmetric SCs are systematically investigated. The results verify that the fabricated symmetric and asymmetric FSS-SCs present excellent reversibility (within the voltage window of 0–1 V and 0–2 V, respectively) and good cycling stability (83 and 91%, respectively for 3000 of CV cycles). Additionally, the asymmetric SC shows maximum specific capacitance of 92 Fg−1, about 2-fold of higher energy density (41.8 Wh kg−1) than symmetric SC and excellent mechanical flexibility. Furthermore, the “real-life” demonstration of fabricated SCs to the panel of SUK confirms that asymmetric SC has 2-fold higher energy density compare to symmetric SC.
Rights: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
RMID: 0030065692
DOI: 10.1038/srep12454
Appears in Collections:Chemical Engineering publications

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