Synthesis and electrochemical characterization of amorphous manganese-nickel oxide as supercapacitor electrode material

Chan, Pei Yi and Majid, Siti Rohana (2018) Synthesis and electrochemical characterization of amorphous manganese-nickel oxide as supercapacitor electrode material. Ionics, 24 (2). pp. 539-548. ISSN 0947-7047

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Official URL: https://doi.org/10.1007/s11581-017-2227-2

Abstract

An amorphous composite film consisted of manganese and nickel oxide was synthesized using simple chronopotentiometry method and tested as electrode material for supercapacitor. The composite film was examined using X-ray diffraction, transmission electron microscopy, and electrochemical characterizations. The electrochemical characterization was performed using cyclic voltammetry, galvanostatic charge-discharge, and frequency response analyzer by a three-electrode configuration. The prepared composite electrode remained amorphous until 400 °C. The composite film deposited at 13 min and annealed at 300 °C was found to perform the best. It exhibited a good specific capacitance of 670 F g−1 over a potential window of 1 V in 1 M Na2SO4. Annealing temperature higher than 300 °C brought about a rapid decrease in specific capacitance. The composite electrode remained 61% of initial specific capacitance after 1000 cycles.

Item Type: Article
Uncontrolled Keywords: Adsorption; Annealing; Composite materials; Electrochemical techniques; Electron microscopy
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 06 Sep 2019 06:32
Last Modified: 06 Sep 2019 06:32
URI: http://eprints.um.edu.my/id/eprint/22278

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