Title :
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
fDate :
8/1/2011 12:00:00 AM
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;
Journal_Title :
Micro & Nano Letters, IET
DOI :
10.1049/mnl.2011.0260
