Synthesising of ZnO nanopetals for supercapacitor applications

Author

Purushothaman, K.K. ; Priya, V. Suba ; Nagamuthu, S. ; Vijayakumar, Sethu ; Muralidharan, Girish

Author_Institution

Dept. of Phys., TRP Eng. Coll. (SRM), Trichy, India

Volume

6

Issue

8

fYear

2011

fDate

8/1/2011 12:00:00 AM

Firstpage

668

Lastpage

670

Abstract

ZnO nanopowders have been synthesised using the spray pyrolysis method. XRD analysis reveals the powder samples to be of crystallite size 19 nm. SEM images indicate petal-like formation for the zinc oxide powder. The electrochemical properties have been studied using cyclic-voltammetric and chrono-potentiometric techniques. The specific capacitance of the ZnO electrode in the presence of 2M KOH electrolyte was 365 F/g at a scan rate of 5 mV/s. The decrease in the specific capacitance of 22 has been observed after 1200 cycles.

Keywords

II-VI semiconductors; X-ray diffraction; capacitance; crystallites; electrochemical electrodes; electrochemistry; nanofabrication; nanoparticles; powders; pyrolysis; scanning electron microscopy; semiconductor growth; spraying; supercapacitors; voltammetry (chemical analysis); wide band gap semiconductors; zinc compounds; KOH electrolyte; SEM images; XRD analysis; ZnO; ZnO electrode; ZnO nanopetals; ZnO nanopowders; chronopotentiometric technique; crystallite size; cyclic-voltammetric technique; electrochemical properties; petal-like formation; scan rate; size 19 nm; specific capacitance; spray pyrolysis method; supercapacitor applications; zinc oxide powder;

fLanguage

English

Journal_Title

Micro & Nano Letters, IET

Publisher

iet

ISSN

1750-0443

Type

jour

DOI

10.1049/mnl.2011.0260

Filename

6013011