Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Synergy of nano-ZnO and 3D-graphene foam electrodes for asymmetric supercapacitor devices

Author affiliations

Abstract

Two kinds of electrode materials were produced to fabricate asymmetric supercapacitor devices: (i) Highly defective, n-type wide bandgap semiconductor ZnO nanocrystalline electrodes below 50 nm were synthesized with the aid of the high energy ball milling technique. (ii) Flexible 3D-graphene foams were synthesized via the chemical vapor deposition technique. Extensive defect structure analysis was performed via enhanced characterization techniques mainly the spectroscopy ones: electron paramagnetic resonance (EPR), Raman, and photoluminescence (PL). Compared to bulk ZnO electrodes the nanoscale ZnO electrodes revealed a dramatic increase of defect concentration. The surface defect plays a crucial role in the electrochemical performance of supercapacitor devices. Strong decreases in charge transfer resistance were observed for the smallest crystallite size which is 15 nm. This work also shows that synthesis, controlling the defect structures, electronic and electrical characterization and the device production are extremely important to obtain high performance faradaic asymmetric supercapacitors.

Graphical abstract: Synergy of nano-ZnO and 3D-graphene foam electrodes for asymmetric supercapacitor devices

Back to tab navigation

Article information


Submitted
11 Mar 2020
Accepted
17 Apr 2020
First published
17 Apr 2020

Nanoscale, 2020, Advance Article
Article type
Paper

Synergy of nano-ZnO and 3D-graphene foam electrodes for asymmetric supercapacitor devices

M. Toufani, S. Kasap, A. Tufani, F. Bakan, S. Weber and E. Erdem, Nanoscale, 2020, Advance Article , DOI: 10.1039/D0NR02028A

Social activity

Search articles by author

Spotlight

Advertisements