Development of mesoporous carbon nanocomposites film from synthetic precursor and natural cellulose incorporated with Mn₂O₃ for supercapacitor application
A good matching between the electrode material, pore size suitable for diffusion of electrolyte ions and the dimensions of ionic species is necessary for an optimal performance of electrode materials. By developing a cost-effective mesoporous carbon (MPC) electrode material with highly developed...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
2020
|
| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/91076/1/ITMA%202020%209%20IR.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| id |
my-upm-ir.91076 |
|---|---|
| record_format |
uketd_dc |
| institution |
Universiti Putra Malaysia |
| collection |
PSAS Institutional Repository |
| language |
English |
| advisor |
Zainal, Zulkarnain |
| topic |
Supercapacitors Electrodes Mesoporous materials - Analysis |
| spellingShingle |
Supercapacitors Electrodes Mesoporous materials - Analysis Sarif @ Mohd Ali, Mahanim Development of mesoporous carbon nanocomposites film from synthetic precursor and natural cellulose incorporated with Mn₂O₃ for supercapacitor application |
| description |
A good matching between the electrode material, pore size suitable for diffusion
of electrolyte ions and the dimensions of ionic species is necessary for an optimal
performance of electrode materials. By developing a cost-effective mesoporous
carbon (MPC) electrode material with highly developed surface area and high
electric conductivity may address the issues to enhance the capacitive
performance of the material as well as power density, energy density and its
cycle life. Thus, this study aims at developing MPC film from Resorcinol(R)
/Formaldehyde(F)/F127 and modifying the carbon precursor using natural
cellulose of carboxymethyl cellulose (CMC) before incorporated with manganese
oxide (Mn2O3). That is purposedly to enhance the capacitance attributed from
electric double layer (EDLC) properties in MPC film as well as the
pseudocapacitive properties from faradaic redox reactions of Mn2O3. All samples
were synthesised by using a spin coating self-assembly soft templating method
and incipient wetness impregnation followed by calcination. The experimental
conditions such as carbonisation temperature, molar ratio, stirring time,
concentrations and calcination temperature and time were manipulated to
enhance the capacitive performance of the electrode materials. X-ray diffraction
(XRD), Fourier transform infrared (FTIR), Raman spectroscopy, X-ray
photoelectron spectroscopy (XPS) and field emission scanning electron
microscopy (FESEM) analysis was conducted to confirmed the structure and
surface morphology of the samples. The electrochemical measurements e.g.
cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD)
measurement was performed in 1 M potassium chloride (KCl) electrolyte solution
in a three-electrode system assembly.
From the results, it was revealed that the specific capacitance of Mn2O3/MPC
composites film calcined at 300 °C showed 3.5 times higher with 53.59 mF cm-2
than optimised MPC film only 15.23 mF cm-2. These are in good agreement with the impressive results of a low internal resistance value recorded for
Mn2O3/MPC, which could lead to the interpretation of higher specific capacitance
compared to MPC as supported by the CV and GCD results. Mn2O3/MPC
composite film displayed the highest energy and power density and shows fairly
stable capacitance with sample could retain about 71% of its initial capacitance
until reaching 1000 cycles. Then the research geared onwards by applying green
raw material which is CMCs as a carbon source for the electrode materials. In
this study, two types of CMC; bamboo CMC and agro-based CMC commercial
were used before Mn2O3 incorporation. The enhancement in specific
capacitance with 31.98 mF cm-2 for Mn2O3/CMCPCbam was observed to be 3.3
times higher compared to pure carbon samples. Mn2O3/CMCPCbam and
Mn2O3/CMCPCcom show a relatively stable capacitance of around 65.6% and
68.5% of the initial capacitance after 1000 charge-discharge cycles and showing
highest energy and power density.
The incorporation of pseudocapacitance metal oxides with EDLC carbon films is
therefore an effective way to increase electrochemical performance in terms of
specific capacitance, power density and energy density characteristics of carbon
materials. The presence of Mn2O3 was strongly proved by the XRD, XPS and
FTIR analysis while FESEM-EDX and HRTEM confirmed their existence in the
structure. This strategy highlights well-organised mesoporous carbon films from
synthetic and natural cellulose precursor with superior electrochemical
performance as the promising materials for advanced supercapacitor
applications. |
| format |
Thesis |
| qualification_level |
Doctorate |
| author |
Sarif @ Mohd Ali, Mahanim |
| author_facet |
Sarif @ Mohd Ali, Mahanim |
| author_sort |
Sarif @ Mohd Ali, Mahanim |
| title |
Development of mesoporous carbon nanocomposites film from synthetic precursor and natural cellulose incorporated with Mn₂O₃ for supercapacitor application |
| title_short |
Development of mesoporous carbon nanocomposites film from synthetic precursor and natural cellulose incorporated with Mn₂O₃ for supercapacitor application |
| title_full |
Development of mesoporous carbon nanocomposites film from synthetic precursor and natural cellulose incorporated with Mn₂O₃ for supercapacitor application |
| title_fullStr |
Development of mesoporous carbon nanocomposites film from synthetic precursor and natural cellulose incorporated with Mn₂O₃ for supercapacitor application |
| title_full_unstemmed |
Development of mesoporous carbon nanocomposites film from synthetic precursor and natural cellulose incorporated with Mn₂O₃ for supercapacitor application |
| title_sort |
development of mesoporous carbon nanocomposites film from synthetic precursor and natural cellulose incorporated with mn₂o₃ for supercapacitor application |
| granting_institution |
Universiti Putra Malaysia |
| publishDate |
2020 |
| url |
http://psasir.upm.edu.my/id/eprint/91076/1/ITMA%202020%209%20IR.pdf |
| _version_ |
1747813672897478656 |
| spelling |
my-upm-ir.910762021-10-25T03:08:23Z Development of mesoporous carbon nanocomposites film from synthetic precursor and natural cellulose incorporated with Mn₂O₃ for supercapacitor application 2020-08 Sarif @ Mohd Ali, Mahanim A good matching between the electrode material, pore size suitable for diffusion of electrolyte ions and the dimensions of ionic species is necessary for an optimal performance of electrode materials. By developing a cost-effective mesoporous carbon (MPC) electrode material with highly developed surface area and high electric conductivity may address the issues to enhance the capacitive performance of the material as well as power density, energy density and its cycle life. Thus, this study aims at developing MPC film from Resorcinol(R) /Formaldehyde(F)/F127 and modifying the carbon precursor using natural cellulose of carboxymethyl cellulose (CMC) before incorporated with manganese oxide (Mn2O3). That is purposedly to enhance the capacitance attributed from electric double layer (EDLC) properties in MPC film as well as the pseudocapacitive properties from faradaic redox reactions of Mn2O3. All samples were synthesised by using a spin coating self-assembly soft templating method and incipient wetness impregnation followed by calcination. The experimental conditions such as carbonisation temperature, molar ratio, stirring time, concentrations and calcination temperature and time were manipulated to enhance the capacitive performance of the electrode materials. X-ray diffraction (XRD), Fourier transform infrared (FTIR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and field emission scanning electron microscopy (FESEM) analysis was conducted to confirmed the structure and surface morphology of the samples. The electrochemical measurements e.g. cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD) measurement was performed in 1 M potassium chloride (KCl) electrolyte solution in a three-electrode system assembly. From the results, it was revealed that the specific capacitance of Mn2O3/MPC composites film calcined at 300 °C showed 3.5 times higher with 53.59 mF cm-2 than optimised MPC film only 15.23 mF cm-2. These are in good agreement with the impressive results of a low internal resistance value recorded for Mn2O3/MPC, which could lead to the interpretation of higher specific capacitance compared to MPC as supported by the CV and GCD results. Mn2O3/MPC composite film displayed the highest energy and power density and shows fairly stable capacitance with sample could retain about 71% of its initial capacitance until reaching 1000 cycles. Then the research geared onwards by applying green raw material which is CMCs as a carbon source for the electrode materials. In this study, two types of CMC; bamboo CMC and agro-based CMC commercial were used before Mn2O3 incorporation. The enhancement in specific capacitance with 31.98 mF cm-2 for Mn2O3/CMCPCbam was observed to be 3.3 times higher compared to pure carbon samples. Mn2O3/CMCPCbam and Mn2O3/CMCPCcom show a relatively stable capacitance of around 65.6% and 68.5% of the initial capacitance after 1000 charge-discharge cycles and showing highest energy and power density. The incorporation of pseudocapacitance metal oxides with EDLC carbon films is therefore an effective way to increase electrochemical performance in terms of specific capacitance, power density and energy density characteristics of carbon materials. The presence of Mn2O3 was strongly proved by the XRD, XPS and FTIR analysis while FESEM-EDX and HRTEM confirmed their existence in the structure. This strategy highlights well-organised mesoporous carbon films from synthetic and natural cellulose precursor with superior electrochemical performance as the promising materials for advanced supercapacitor applications. Supercapacitors Electrodes Mesoporous materials - Analysis 2020-08 Thesis http://psasir.upm.edu.my/id/eprint/91076/ http://psasir.upm.edu.my/id/eprint/91076/1/ITMA%202020%209%20IR.pdf text en public doctoral Universiti Putra Malaysia Supercapacitors Electrodes Mesoporous materials - Analysis Zainal, Zulkarnain |