A Novel Asymmetric Supercapacitor Designed with Mn3O4@Multi-wall Carbon Nanotube Nanocomposite and Reduced Graphene Oxide Electrodes
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- 作者：Manas Mandal ; Debasis Ghosh ; Krishna Chattopadhyay…
- 刊名：Journal of Electronic Materials
- 出版年：2016
- 出版时间：July 2016
- 年：2016
- 卷：45
- 期：7
- 页码：3491-3500
- 全文大小：2,320 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Optical and Electronic Materials
Characterization and Evaluation Materials
Electronics, Microelectronics and Instrumentation
Solid State Physics and Spectroscopy - 出版者：Springer Boston
- ISSN：1543-186X
- 卷排序：45
文摘
We demonstrate a straightforward process for the synthesis and fabrication of a hybrid-type asymmetric supercapacitor (ASC) by combining Mn3O4 nanoparticle-supported multi-wall carbon nanotube (Mn3O4@MWCNT) composite as positive and reduced graphene oxide (rGO) as negative electrodes. A controlled hydrothermal synthesis of Mn3O4 in the presence of MWCNT resulted in a well-distributed Mn3O4 nanoparticles on the MWCNT backbone in the Mn3O4@MWCNT composite. The structure and morphology of the as-prepared materials have been investigated by x-ray diffraction, Fourier transform infrared spectroscopy, field-emission scanning electron microscopy, transmission electron microscopy, Brunauer–Emmett–Teller analysis and x-ray photoelectron spectroscopy measurements. The electrochemical characterizations were carried out in terms of cyclic voltammetry, galvanostatic charge–discharge (GCD) and electrochemical impedance spectroscopy analysis. The constructed ASC with 1 M KOH-supporting electrolyte was able to provide high-specificity capacitance of 173.36 F/g at 2 mV/s scan rate and high-energy density of 26.8 Wh/kg accompanied by high cycle stability with 79.3% capacitance retention over 3000 GCD cycles.KeywordsAsymmetric supercapacitorcompositesMn3O4reduced graphene oxidepseudocapacitance