Tailoring morphology to control defect structures in ZnO electrodes for high-performance supercapacitor devices

Warning The system is temporarily closed to updates for reporting purpose.

Najib, Sumaiyah and Bakan, Feray and Abdullayeva, Nazrin and Bahariqushchi, Rahim and Kasap, Sibel and Franzò, Giorgia and Sankir, Mehmet and Demirci Sankir, Nurdan and Mirabella, Salvo and Erdem, Emre (2020) Tailoring morphology to control defect structures in ZnO electrodes for high-performance supercapacitor devices. Nanoscale, 12 (30). pp. 16162-16172. ISSN 2040-3364 (Print) 2040-3372 (Online)

Full text not available from this repository. (Request a copy)


Zinc oxide (ZnO) nanostructures were synthesized in the form of nanoparticles, nanoflowers and nanourchins. Structural, electronic and optical characterization of the samples was performedviastandard techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence, Raman and ultraviolet-visible (UV-Vis) spectroscopy. Point defect structures which are specific to each morphology have been investigated in terms of their concentration and locationviastate-of-the-art electron paramagnetic resonance (EPR) spectroscopy. According to the core-shell model, all the samples revealed core defects; however, the defects on the surface are smeared out. Finally, all three morphologies have been tested as electrode materials in a real supercapacitor device and the performance of the device, in particular, the specific capacitance and the storage mechanism, has been mediated by the point defects. Morphology-dependent defective ZnO electrodes enable the monitoring of the working principle of the supercapacitor device ranging from electric double-layer capacitors (EDLC) to pseudo-supercapacitors.
Item Type: Article
Subjects: Q Science > Q Science (General)
Divisions: Sabancı University Nanotechnology Research and Application Center
Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Faculty of Engineering and Natural Sciences
Depositing User: Feray Bakan
Date Deposited: 12 Sep 2020 13:45
Last Modified: 12 Sep 2020 13:45
URI: https://research.sabanciuniv.edu/id/eprint/40456

Actions (login required)

View Item
View Item