Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7708050 | International Journal of Hydrogen Energy | 2018 | 12 Pages |
Abstract
In present study, new strategy is employed to build composite nanostructure and asymmetric configuration to enhance the capacitive performance of supercapacitor device. The WO3-MnO2 composite with mesoporous structure is prepared by single-step hydrothermal method and used to gain superior electrochemical performance in asymmetric configuration. A binder-free and additive-less WO3-MnO2 composite electrode exhibits high specific capacitance of 609 F gâ1 at a scan rate of 5 mV sâ1. The flexible asymmetric supercapacitor device with WO3-MnO2 as a positive electrode and WO3 as a negative electrode demonstrates stable operating potential window of 1.4 V with specific capacitance of 103 F gâ1 at a scan rate of 5 mV sâ1 and energy density of 24.13 Wh kgâ1 at power density of 915 W kgâ1. Furthermore, WO3-MnO2//WO3 device exhibits good cycle life with capacity retention of 95% after 2500 cycles and excellent mechanical flexibility. These results reveal the potential of WO3-MnO2 composite electrode for fabrication of high-performance supercapacitors.
Related Topics
Physical Sciences and Engineering
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Electrochemistry
Authors
Pragati A. Shinde, Vaibhav C. Lokhande, Amar M. Patil, Taeksoo Ji, Chandrakant D. Lokhande,