Electrochemical Properties of Electrodeposited MnO2 Nanoparticles

• Main Authors: Ali, Gomaa A. M., M. M., Yusoff, K. F., Chong
• Format: Article
• Language: English; English
• Published: Trans Tech Publications, Switzerland 2015
• Subjects: QD Chemistry
• Online Access: http://umpir.ump.edu.my/id/eprint/7776/1/fist-2014-gomma-Electrochemical_Properties.pdf; http://umpir.ump.edu.my/id/eprint/7776/4/fist-2015-gomaa-Electrochemical%20Properties%20of%20Electrodeposited%20Mn02%20Nanoparticles.pdf; http://umpir.ump.edu.my/id/eprint/7776/; http://www.scientific.net/AMR.1113.550

The present study shows the electrodeposition of MnO2 from KMnO solution and its electrochemical studies. XRD and FESEM analyses showed the electrodeposited MnO2 had nano-sized particle of 18 nm. The electrochemical properties had been investigated using the cyclic voltammetry, galvanostatic charge/discharge and impedance techniques in 1 M Na as electrolyte. The electrodeposited MnO showed good electrochemical behavior with high specific capacitance value of ca. 326 F g2-1. Moreover, it showed high capacitance stability of 84% over 1750 charge/discharge cycles as well as high columbic efficiency of 94 %. Impedance spectra showed low solution and charge transfer resistances, an indication of the conductive nature for the electrodeposited film.