Electrosynthesis and modification of titania nanotubes and incorporation of manganese-nickel oxides for supercapacitor application

Highly ordered titania nanotubes (TNTs) as a 1D nanostructured material have received a lot of interest for supercapacitor applications due to their large surface area and relatively low cost. In this study, TNTs was synthesized by anodization in glycerol-based electrolytes. Electrochemical reductio...

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Main Author:	Muhammad, Muzakir Muhammad
Format:	Thesis
Language:	English
Published:	2021
Subjects:	Electrochemical analysis Titanates Nanotubes
Online Access:	http://psasir.upm.edu.my/id/eprint/92765/1/FS%202021%2045%20IR.pdf
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spelling	my-upm-ir.927652022-04-26T01:48:36Z Electrosynthesis and modification of titania nanotubes and incorporation of manganese-nickel oxides for supercapacitor application 2021-06 Muhammad, Muzakir Muhammad Highly ordered titania nanotubes (TNTs) as a 1D nanostructured material have received a lot of interest for supercapacitor applications due to their large surface area and relatively low cost. In this study, TNTs was synthesized by anodization in glycerol-based electrolytes. Electrochemical reduction process was used to modify the TNTs to overcome its high resistivity. The reduced titania nanotubes (R-TNTs) show improved capacitance of 2.28 mF cm-2 which is 7 times higher than TNTs. The R-TNTs exhibit a rectangular cyclic voltammograms and symmetrical triangular charge-discharge curves which are ideal characteristics of electric double layer capacitors (EDLCs). Furthermore, MnO2, NiO and binary NiMn2O4 were incorporated into the nanotubular structures of R-TNTs by pulse electrodeposition (PED) to enhance the capacitive performance of R-TNTs. The capacitance increased to 50.81 mF cm-2, 16.57 mF cm-2 and 97.52 mF cm-2 for MnO2/R-TNTs, NiO/R-TNTs and NiMn2O4/R-TNTs, respectively. All cyclic voltammograms and galvanostatic charge-discharge curves from these samples measured in 1M KCl using three electrode-configuration indicate a pseudocapacitive contribution from the deposited metal oxides. The highest capacitance obtained for the NiMn2O4/R-TNTs composite is attributed to the synergistic effects of the MnO2 and NiO deposited onto high conductivity RTNTs. Physical characterization of all the synthesized samples was conducted by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Higher energy and power density of 5.31 mWh cm-2 and 190.91 mW cm-2 respectively were obtained for NiMn2O4/R-TNTs asymmetric cell in two-electrode configuration. Electrochemical analysis Titanates Nanotubes 2021-06 Thesis http://psasir.upm.edu.my/id/eprint/92765/ http://psasir.upm.edu.my/id/eprint/92765/1/FS%202021%2045%20IR.pdf text en public doctoral Universiti Putra Malaysia Electrochemical analysis Titanates Nanotubes Zainal, Zulkarnain
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
advisor	Zainal, Zulkarnain
topic	Electrochemical analysis Titanates Nanotubes
spellingShingle	Electrochemical analysis Titanates Nanotubes Muhammad, Muzakir Muhammad Electrosynthesis and modification of titania nanotubes and incorporation of manganese-nickel oxides for supercapacitor application
description	Highly ordered titania nanotubes (TNTs) as a 1D nanostructured material have received a lot of interest for supercapacitor applications due to their large surface area and relatively low cost. In this study, TNTs was synthesized by anodization in glycerol-based electrolytes. Electrochemical reduction process was used to modify the TNTs to overcome its high resistivity. The reduced titania nanotubes (R-TNTs) show improved capacitance of 2.28 mF cm-2 which is 7 times higher than TNTs. The R-TNTs exhibit a rectangular cyclic voltammograms and symmetrical triangular charge-discharge curves which are ideal characteristics of electric double layer capacitors (EDLCs). Furthermore, MnO2, NiO and binary NiMn2O4 were incorporated into the nanotubular structures of R-TNTs by pulse electrodeposition (PED) to enhance the capacitive performance of R-TNTs. The capacitance increased to 50.81 mF cm-2, 16.57 mF cm-2 and 97.52 mF cm-2 for MnO2/R-TNTs, NiO/R-TNTs and NiMn2O4/R-TNTs, respectively. All cyclic voltammograms and galvanostatic charge-discharge curves from these samples measured in 1M KCl using three electrode-configuration indicate a pseudocapacitive contribution from the deposited metal oxides. The highest capacitance obtained for the NiMn2O4/R-TNTs composite is attributed to the synergistic effects of the MnO2 and NiO deposited onto high conductivity RTNTs. Physical characterization of all the synthesized samples was conducted by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Higher energy and power density of 5.31 mWh cm-2 and 190.91 mW cm-2 respectively were obtained for NiMn2O4/R-TNTs asymmetric cell in two-electrode configuration.
format	Thesis
qualification_level	Doctorate
author	Muhammad, Muzakir Muhammad
author_facet	Muhammad, Muzakir Muhammad
author_sort	Muhammad, Muzakir Muhammad
title	Electrosynthesis and modification of titania nanotubes and incorporation of manganese-nickel oxides for supercapacitor application
title_short	Electrosynthesis and modification of titania nanotubes and incorporation of manganese-nickel oxides for supercapacitor application
title_full	Electrosynthesis and modification of titania nanotubes and incorporation of manganese-nickel oxides for supercapacitor application
title_fullStr	Electrosynthesis and modification of titania nanotubes and incorporation of manganese-nickel oxides for supercapacitor application
title_full_unstemmed	Electrosynthesis and modification of titania nanotubes and incorporation of manganese-nickel oxides for supercapacitor application
title_sort	electrosynthesis and modification of titania nanotubes and incorporation of manganese-nickel oxides for supercapacitor application
granting_institution	Universiti Putra Malaysia
publishDate	2021
url	http://psasir.upm.edu.my/id/eprint/92765/1/FS%202021%2045%20IR.pdf
_version_	1747813761870200832

Electrosynthesis and modification of titania nanotubes and incorporation of manganese-nickel oxides for supercapacitor application

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