Journal article
A comparative study of various polyelectrolyte/nanocomposite electrode combinations in symmetric supercapacitors

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Publication Details
Author list: Emre Cevik, Seyda Tugba Gunday, Sultan Akhtar and Ayhan Bozkurt
Publisher: Elsevier
Publication year: 2019
Journal: International Journal of Hydrogen Energy
Journal name in source: International Journal of Hydrogen Energy
Volume number: 44
Issue number: 31
Start page: 16099
End page: 16109
Number of pages: 11
ISSN: 0360-3199
Web of Science ID: 000472991100007
PubMed ID:
Scopus ID: 85065914992

A more practical, nontoxic and cheaper electrolyte, poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPS) was used to construct supercapacitors with different nanocomposite electrodes. The flexible devices were fabricated including active carbon (AC) electrode and nanocomposites electrodes of AC/nano-silica (nano-SiO2) and AC/multiwalled carbon nanotubes (MWCNTs) at various weight percentages. The symmetrical cell made from AC electrodes generated a maximum specific capacitance (Cs) of 315 F g−1 at 0.5 A g−1. The energy density of this device was 55.5 Wh kg−1 at a power density of 690 W kg−1. Excellent performance was achieved after 5000 charge-discharge cycles where the supercapacitor maintains 92% of its activity. The energy storage capability of the supercapacitors was also investigated with the addition of nano-SiO2 and MWCNTs. The Cs of the supercapacitors made with the electrodes AC/nano-SiO2 (5%, 10%, 25% and 50%) were 172, 228, 247 and 55 F g−1, respectively. Similarly, the capacity of the device including the electrodes of AC/MWCNTs (5%, 10%, 25% and 50%) varied as 191, 244, 93 and 20 F g−1 at 0.5 A g−1. The maximum energy density of the devices having nano-SiO2 and MWCNT were 44.4 Wh kg−1 and 43.8 Wh kg−1, respectively at a power density of 520 W kg−1. A supercapacitor with certain dimension successfully operated a light-emitting diode (LED).

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Last updated on 2019-22-08 at 09:17