Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 252, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2019.114481
Keywords
Zinc manganate; MWCNT; Nanocomposite; Electrode material; Supercapacitor
Funding
- DST-NANOMISSION PROJECT [SR/NM/NT-1073/2016]
- DST-INSPIRE [IFA12-CH-84]
- Community of Madrid, Spain [2017-T1/AMB5610]
- DST-Technology Mission Division, India [DST/TMD/HFC/2K18/124(G)]
- SERB-DST, India [EEQ/2017/000417]
- Nanomission Project [SR/NM/NS-20/2014]
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This work focuses on designing new electrode materials by fabricating a nanocomposite hybrid of MWCNTs and a binary metal oxide, ZnMn2O4. The ZnMn2O4 has been extensively investigated as a high-performance anode in Li-ion battery, however, its capacitive faradaic charge storage behavior is rarely explored. Herein we demonstrate the fabrication of ZnMn2O4-CNT nanocomposites using acid modified MWCNTs and a one-step green hydrothermal method for supercapacitor application. The SEM analysis of the as-fabricated composites showed that the ZnMn2O4 nanoparticles were uniformly anchored on the MWCNTs backbone, which helps to maintain good electrical channel throughout the composite. Electrochemical characterizations were carried out in a three-electrode configuration in the 1 M Na2SO4 electrolyte in terms of cyclic voltammetry, galvanostatic charge discharge and electrochemical impedance spectroscopy analyses. The synergistic interaction between the MWCNTs and the ZnMn2O4 nanoparticles resulted in a high specific capacitance of 103 F/g of the as-fabricated electrode.
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