Synthesis of Free-Standing Flexible rGO/MWCNT Films for Symmetric Supercapacitor Application
Nanoscale Research Letters, ISSN: 1556-276X, Vol: 14, Issue: 1, Page: 266
2019
- 45Citations
- 59Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Metrics Details
- Citations45
- Citation Indexes45
- CrossRef45
- 43
- Captures59
- Readers59
- 59
Article Description
Herein, we report a novel, simple, and cost-effective way to synthesize flexible and conductive rGO and rGO/MWCNT freestanding films. The effects of MWCNT addition on the electrochemical performance of rGO/MWCNT nanocomposite films are investigated in some strong base aqueous electrolytes, such as KOH, LiOH, and NaOH via three-electrode system. The supercapacitor behavior of the films is probed via cyclic voltammetry, galvanostatic charging-discharging, and electrochemical impedance spectroscopy. The structural and morphological studies of the films are performed by X-ray diffractometer, Raman spectrometer, surface area analyzer, thermogravimetric analysis, field emission scanning electron microscope and transmission electron microscope. The rGO/MWCNT film synthesized with 10 wt% MWCNTs (GP10C) exhibits high specific capacitance of 200 Fg, excellent cyclic stability with 92% retention after 15,000 long cycle test, small relaxation time constant (~ 194 ms), and high diffusion coefficient (7.8457 × 10 cm s) in 2 M KOH electrolyte. Furthermore, the symmetric supercapacitor coin cell with GP10C as both anode and cathode using 2 M KOH as electrolyte demonstrates high energy density of 29.4 Whkg and power density of 439 Wkg at current density 0.1 Ag and good cyclic stability with 85% retention of the initial capacitance at 0.3 Ag after 10,000 cycles. Such a high performance of the GP10C film in the supercapacitor can be ascribed to the large surface area and small hydration sphere radius and high ionic conductivity of K cations in KOH electrolyte.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85073646883&origin=inward; http://dx.doi.org/10.1186/s11671-019-3100-1; http://www.ncbi.nlm.nih.gov/pubmed/31388840; https://link.springer.com/10.1186/s11671-019-3100-1; https://dx.doi.org/10.1186/s11671-019-3100-1; https://link.springer.com/article/10.1186/s11671-019-3100-1
Springer Science and Business Media LLC
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