Estimation of electrochemical charge storage capability of ZnO/CuO/reduced graphene oxide nanocomposites

Hassnain Asgar, Kashif Mairaj Deen, Waseem Haider

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Nanocomposites of ZnO/CuO with rGO were synthesized using sonochemical and thermal treatment methods. The formation of ZnO and CuO phases on the rGO sheets and both ZnO/CuO in the ternary component nanocomposites were confirmed from IR spectroscopy and X-ray photoelectron spectroscopy. The microstructure of the nanocomposites as revealed by TEM and FE-SEM suggested that CuO was decorated as nano-rods, whereas ZnO particles retained the spherical shape. In case of ternary nanocomposite, both nano-rods and spherical particles were agglomerated on the rGO sheets. The pseudocapacitive behavior of ZnO-rGO nanocomposite corresponded to relatively higher specific capacitance (344.6 F/g) compared with other nanocomposites. The galvanostatic cyclic charge/discharge (GCD) tests also confirmed that ZnO-rGO nanocomposite could provide the highest specific energy (21.7 Wh/kg) and power density (129.8 kW/kg) at 0.4 A/g compared with CuO-rGO and ZnO/CuO-rGO.

Original languageEnglish
Pages (from-to)1580-1593
Number of pages14
JournalInternational Journal of Energy Research
Volume44
Issue number3
DOIs
StatePublished - Mar 10 2020

Keywords

  • charging/discharging
  • reduce graphene oxide
  • specific energy
  • supercapacitance

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