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Development of biodegradable solid polymer electrolytes incorporating different nanoparticles for electric double layer capacitor / Chong Mee Yoke

The increasing demand, rapid consumption of fossil fuels and undesirable consequences of environmental pollution are the alarming concerns from the last few decades. Therefore, much effort has been made to develop biodegradable solid polymer electrolyte (SPE) using natural polymer as host polymer...

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Main Author: Chong, Mee Yoke
Format: Thesis
Published: 2017
Subjects:
Q Science (General)
QC Physics
Online Access:http://studentsrepo.um.edu.my/7859/2/All.pdf
http://studentsrepo.um.edu.my/7859/9/mee_yoke.pdf
http://studentsrepo.um.edu.my/7859/
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spelling my.um.stud.78592020-02-04T23:18:20Z Development of biodegradable solid polymer electrolytes incorporating different nanoparticles for electric double layer capacitor / Chong Mee Yoke Chong, Mee Yoke Q Science (General) QC Physics The increasing demand, rapid consumption of fossil fuels and undesirable consequences of environmental pollution are the alarming concerns from the last few decades. Therefore, much effort has been made to develop biodegradable solid polymer electrolyte (SPE) using natural polymer as host polymer for energy storage and energy conversion devices. The choice of natural polymers as host polymer for the preparation of SPE are hydroxylpropylmethyl cellulose (HPMC) and hydroxylethyl cellulose (HEC). As a result, HEC has been chosen in this study because it has huge amount of hydroxyl groups compared to cellulose and its derivatives. Consequently, it assists in the adsorption of charge carriers, which results in the improvement of charge storage capacity. However, preparation of biodegradable SPE by using solution casting technique exhibits low ionic conductivity. Thus, green ionic liquid (1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMIMTf)) and nanoparticles (fumed silica (fumed SiO2), copper(II) oxide (CuO) and yttrium(III) oxide (Y2O3)) have been incorporated into the biodegradable SPE along with magnesium trifluoromethanesulfonate (MgTf2) salt as mobile charge carriers to improve its ionic conductivity for electric double layer capacitor (EDLC). Electric double layer capacitor has been chosen over batteries owing to their good thermal and chemical stability, higher potential window (which leads to high energy density) and longer cycling stability. Based on the findings, cell fabricated by inclusion of 2 wt. % of CuO nanoparticles obtained the highest specific capacitance (36.7 F/g) at scan rate of 5 mV/s along with the lowest charge transfer resistance (25.0 Ω) whereas cell fabricated by 2 wt. % of Y2O3 nanoparticles achieved the highest capacitance retention of 91.3 % over 3,000 cycles at current density of 0.4 A/g. 2017-07 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/7859/2/All.pdf application/pdf http://studentsrepo.um.edu.my/7859/9/mee_yoke.pdf Chong, Mee Yoke (2017) Development of biodegradable solid polymer electrolytes incorporating different nanoparticles for electric double layer capacitor / Chong Mee Yoke. PhD thesis, University of Malaya. http://studentsrepo.um.edu.my/7859/
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
Chong, Mee Yoke
Development of biodegradable solid polymer electrolytes incorporating different nanoparticles for electric double layer capacitor / Chong Mee Yoke
description The increasing demand, rapid consumption of fossil fuels and undesirable consequences of environmental pollution are the alarming concerns from the last few decades. Therefore, much effort has been made to develop biodegradable solid polymer electrolyte (SPE) using natural polymer as host polymer for energy storage and energy conversion devices. The choice of natural polymers as host polymer for the preparation of SPE are hydroxylpropylmethyl cellulose (HPMC) and hydroxylethyl cellulose (HEC). As a result, HEC has been chosen in this study because it has huge amount of hydroxyl groups compared to cellulose and its derivatives. Consequently, it assists in the adsorption of charge carriers, which results in the improvement of charge storage capacity. However, preparation of biodegradable SPE by using solution casting technique exhibits low ionic conductivity. Thus, green ionic liquid (1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMIMTf)) and nanoparticles (fumed silica (fumed SiO2), copper(II) oxide (CuO) and yttrium(III) oxide (Y2O3)) have been incorporated into the biodegradable SPE along with magnesium trifluoromethanesulfonate (MgTf2) salt as mobile charge carriers to improve its ionic conductivity for electric double layer capacitor (EDLC). Electric double layer capacitor has been chosen over batteries owing to their good thermal and chemical stability, higher potential window (which leads to high energy density) and longer cycling stability. Based on the findings, cell fabricated by inclusion of 2 wt. % of CuO nanoparticles obtained the highest specific capacitance (36.7 F/g) at scan rate of 5 mV/s along with the lowest charge transfer resistance (25.0 Ω) whereas cell fabricated by 2 wt. % of Y2O3 nanoparticles achieved the highest capacitance retention of 91.3 % over 3,000 cycles at current density of 0.4 A/g.
format Thesis
author Chong, Mee Yoke
author_facet Chong, Mee Yoke
author_sort Chong, Mee Yoke
title Development of biodegradable solid polymer electrolytes incorporating different nanoparticles for electric double layer capacitor / Chong Mee Yoke
title_short Development of biodegradable solid polymer electrolytes incorporating different nanoparticles for electric double layer capacitor / Chong Mee Yoke
title_full Development of biodegradable solid polymer electrolytes incorporating different nanoparticles for electric double layer capacitor / Chong Mee Yoke
title_fullStr Development of biodegradable solid polymer electrolytes incorporating different nanoparticles for electric double layer capacitor / Chong Mee Yoke
title_full_unstemmed Development of biodegradable solid polymer electrolytes incorporating different nanoparticles for electric double layer capacitor / Chong Mee Yoke
title_sort development of biodegradable solid polymer electrolytes incorporating different nanoparticles for electric double layer capacitor / chong mee yoke
publishDate 2017
url http://studentsrepo.um.edu.my/7859/2/All.pdf
http://studentsrepo.um.edu.my/7859/9/mee_yoke.pdf
http://studentsrepo.um.edu.my/7859/
_version_ 1738506072228888576
score 13.211869

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