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Bimetallic oxide derived from metal organic framework (MOF) as potential electrode materials for supercapacitor / Farah Juliana Juni

Metal oxide is one of the promising electrode materials due to higher capacitance capabilities, higher energy density, low manufacturing cost and easy processability. However, due to major changes of structure and phase during charge-discharge, the performance of the devices will be degraded. In thi...

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Main Author: Farah Juliana , Juni
Format: Thesis
Published: 2021
Subjects:
Q Science (General)
QC Physics
Online Access:http://studentsrepo.um.edu.my/14356/1/Farah_Juliana.pdf
http://studentsrepo.um.edu.my/14356/2/Farah_Juliana.pdf
http://studentsrepo.um.edu.my/14356/
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spelling my.um.stud.143562023-04-17T22:39:14Z Bimetallic oxide derived from metal organic framework (MOF) as potential electrode materials for supercapacitor / Farah Juliana Juni Farah Juliana , Juni Q Science (General) QC Physics Metal oxide is one of the promising electrode materials due to higher capacitance capabilities, higher energy density, low manufacturing cost and easy processability. However, due to major changes of structure and phase during charge-discharge, the performance of the devices will be degraded. In this research, a highly controllable nanostructure of metal oxide was synthesized using a new molecular building blocks with porous structure called metal-organic framework (MOF) as the self-sacrificing template. 2-methylimidazole was reacted with copper ions via co-precipitation method to produce Cu-MOF which exhibits capacitance value of 35 Fg-1 at current density of 0.25 Ag-1. The capacitance value of the electrode was then able to increase through addition of secondary metal, cobalt (CuCo-MOF). The shale-shaped microcrystal copper cobalt nitrate hydroxide exhibits capacitance value of 179 Fg-1 at current density of 0.25 Ag-1. Finally, Cu-MOF and CuCo-MOF were calcined under nitrogen flow at temperatures of 700, 800 and 900 °C to derive the metal oxides and were verified by XRD and XPS results. Oxide obtained at 900 °C (CuMOF-900) exhibited the highest capacitance values of 585 Fg-1 at current density of 0.25 Ag-1. This might be due to the richer oxidant and reductant taking place during the charging and discharging process. However, CuCo-700 was observed to be the most stable since the electrode can retain up to 98 % after 2500 cycles at reversible current densities of 0.25, 0.35 and 0.45 Ag-1. Metal oxide derived from bimetallic-OF proved to enhance the capacitive performance of the electrode materials due to porous structure and richer oxidant and reductant. 2021-07 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/14356/1/Farah_Juliana.pdf application/pdf http://studentsrepo.um.edu.my/14356/2/Farah_Juliana.pdf Farah Juliana , Juni (2021) Bimetallic oxide derived from metal organic framework (MOF) as potential electrode materials for supercapacitor / Farah Juliana Juni. Masters thesis, Universiti Malaya. http://studentsrepo.um.edu.my/14356/
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Student Repository
url_provider http://studentsrepo.um.edu.my/
topic Q Science (General)
QC Physics
spellingShingle Q Science (General)
QC Physics
Farah Juliana , Juni
Bimetallic oxide derived from metal organic framework (MOF) as potential electrode materials for supercapacitor / Farah Juliana Juni
description Metal oxide is one of the promising electrode materials due to higher capacitance capabilities, higher energy density, low manufacturing cost and easy processability. However, due to major changes of structure and phase during charge-discharge, the performance of the devices will be degraded. In this research, a highly controllable nanostructure of metal oxide was synthesized using a new molecular building blocks with porous structure called metal-organic framework (MOF) as the self-sacrificing template. 2-methylimidazole was reacted with copper ions via co-precipitation method to produce Cu-MOF which exhibits capacitance value of 35 Fg-1 at current density of 0.25 Ag-1. The capacitance value of the electrode was then able to increase through addition of secondary metal, cobalt (CuCo-MOF). The shale-shaped microcrystal copper cobalt nitrate hydroxide exhibits capacitance value of 179 Fg-1 at current density of 0.25 Ag-1. Finally, Cu-MOF and CuCo-MOF were calcined under nitrogen flow at temperatures of 700, 800 and 900 °C to derive the metal oxides and were verified by XRD and XPS results. Oxide obtained at 900 °C (CuMOF-900) exhibited the highest capacitance values of 585 Fg-1 at current density of 0.25 Ag-1. This might be due to the richer oxidant and reductant taking place during the charging and discharging process. However, CuCo-700 was observed to be the most stable since the electrode can retain up to 98 % after 2500 cycles at reversible current densities of 0.25, 0.35 and 0.45 Ag-1. Metal oxide derived from bimetallic-OF proved to enhance the capacitive performance of the electrode materials due to porous structure and richer oxidant and reductant.
format Thesis
author Farah Juliana , Juni
author_facet Farah Juliana , Juni
author_sort Farah Juliana , Juni
title Bimetallic oxide derived from metal organic framework (MOF) as potential electrode materials for supercapacitor / Farah Juliana Juni
title_short Bimetallic oxide derived from metal organic framework (MOF) as potential electrode materials for supercapacitor / Farah Juliana Juni
title_full Bimetallic oxide derived from metal organic framework (MOF) as potential electrode materials for supercapacitor / Farah Juliana Juni
title_fullStr Bimetallic oxide derived from metal organic framework (MOF) as potential electrode materials for supercapacitor / Farah Juliana Juni
title_full_unstemmed Bimetallic oxide derived from metal organic framework (MOF) as potential electrode materials for supercapacitor / Farah Juliana Juni
title_sort bimetallic oxide derived from metal organic framework (mof) as potential electrode materials for supercapacitor / farah juliana juni
publishDate 2021
url http://studentsrepo.um.edu.my/14356/1/Farah_Juliana.pdf
http://studentsrepo.um.edu.my/14356/2/Farah_Juliana.pdf
http://studentsrepo.um.edu.my/14356/
_version_ 1765297278735613952
score 13.211869

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