UPM Institutional Repository

Capacitive enhancement of reduced titania nanotubes by reversed pulse electrodeposited Mn2O3 and Co3O4


Citation

Zainal, Zulkarnain and Samsudin, Nurul Asma and Lim, Hong Ngee and Sulaiman, Yusran and Chang, Sook Keng (2017) Capacitive enhancement of reduced titania nanotubes by reversed pulse electrodeposited Mn2O3 and Co3O4. In: 5th International Symposium on Applied Engineering and Sciences (SAES2017), 14-15 Nov. 2017, Universiti Putra Malaysia. (p. 23).

Abstract

Many attempts have been done to improve the capacitive performance of reduced titania nanotubes (R-TNTs) by incorporation of metal oxides via electrodeposition method. In this study, pulse reverse electrodeposition technique has been applied to deposit Mn2O3 and Co3O4 onto the R-TNTs as this technique has the ability to control the composition of targeted materials while at the same time helps in facilitating the uniformity of deposition and the size of the metal oxides onto the reduced nanotubes. Based on FESEM and TEM analyses, it is proven that both metal oxides were uniformly deposited without covering the nanotubes opening. Besides, Mn2O3 and Co3O4 with crystallite size of 13.6 nm and 12.4 nm were recorded in XRD analysis. Electrochemical analyses were performed to evaluate the capacitive performance of both deposited metal oxides. The CV profiles of both metal oxides showed similar patterns attributed to simultaneous charge-storage mechanisms of electric double-layer in R-TNTs and pseudocapacitance in the metal oxides. Galvanostatic charge-discharge showed Mn2O3/R-TNTs exhibits higher specific capacitance of 37.0 mF cm-2 compared to Co3O4/R-TNTs of 16.9 mF cm-2 at 0.1 mA cm-2. Moreover, these deposited samples also exhibit good electrochemical stability by retaining 87% of the initial capacity over 1000 cycles.


Download File

[img]
Preview
Text (Abstract)
MST poster 111117 23.pdf

Download (191kB) | Preview

Additional Metadata

Item Type: Conference or Workshop Item (Poster)
Divisions: Faculty of Science
Institute of Advanced Technology
Keywords: Capacitive; Pulse reverse electrodeposition; Reduced titania nanotubes; Mn2O3; Co3O4
Depositing User: Nabilah Mustapa
Date Deposited: 05 Jul 2018 09:31
Last Modified: 05 Jul 2018 09:31
URI: http://psasir.upm.edu.my/id/eprint/64423
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item