Electrochemical Evaluation of Fluorinated MnO2 for Supercapacitor Application

Siti Nur Najwa, Mohd Yusof and Nurul Khairiyyah, Mohd Zain and Izan Izwan, Misnon and Rajan, Jose (2018) Electrochemical Evaluation of Fluorinated MnO2 for Supercapacitor Application. In: MATEC Web of Conferences: Malaysia Technical Universities Conference on Engineering and Technology (MUCET 2017) , 6-7 December 2017 , Penang, Malaysia. pp. 1-6., 150 (02006). ISSN 2261-236X

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DOI/Official URL: https://doi.org/10.1051/matecconf/201815002006

Abstract

Supercapacitors (SCs) functioning as alternative energy storage is useful in most electronic devices, renewable energy system and hybrid vehicles that have high demand in these days. Excellent electrochemical performance, environment friendliness and low cost material are needed to fulfil the energy demand by most developed country. In this study, fluorination treatment on manganese oxide (MnO2) is considered as an effective way to develop better energy storage due to fluorine electronegativity and reactivity when correlate with other element. Hydrothermal method is used to synthesis MnO2 (MnO2 and MnO2) and the effect of fluorination (FMnO2 and FMnO2) on MnO2 surfaces is investigated on the charge storage ability. The crystallinity and functional groups of the samples was confirmed by the X-ray diffractogram and fourier transforms infrared spectroscopy (FTIR). The cyclic voltammetry (CV) and galvanostatic charging–discharging (CDC) analysis in 0.5 M K2SO4 electrolyte shows that F--MnO2 gives the highest Cs value of 184 F g-1 at scan rate of 5 mV s-1 and 66 F g-1 at current density of 0.3 A g-1. The electrochemical impedance spectroscopy shows that the FMnO2 has the lowest electrode resistances and charge transfer resistance which contributes to high Cs and the high conductivity of electrode.

Item Type:	Conference or Workshop Item (Lecture)
Uncontrolled Keywords:	Cesium; Charge transfer; Chemical bonds; Cyclic voltammetry; Electrochemical electrodes; Electrochemical impedance spectroscopy; Electrodes
Subjects:	Q Science > QD Chemistry
Faculty/Division:	Faculty of Industrial Sciences And Technology
Depositing User:	Mr. Izan Izwan Misnon
Date Deposited:	19 Mar 2018 05:46
Last Modified:	19 Mar 2018 05:46
URI:	http://umpir.ump.edu.my/id/eprint/19588
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