Development of high-performance electrochromic supercapacitors using copper-based metal-organic framework/reduced graphene oxide composites
Supercapacitors (SCs) are promising energy storage devices with tremendous specific capacitance, fast rate for charging/discharging, high specific power and long-life cycle. It is difficult to estimate the state-of-charge of the existing supercapacitors, which leads to excessive charging/discharg...
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my-upm-ir.927532022-06-16T03:56:33Z Development of high-performance electrochromic supercapacitors using copper-based metal-organic framework/reduced graphene oxide composites 2021-09 Mohanadas, Dharshini Supercapacitors (SCs) are promising energy storage devices with tremendous specific capacitance, fast rate for charging/discharging, high specific power and long-life cycle. It is difficult to estimate the state-of-charge of the existing supercapacitors, which leads to excessive charging/discharging. Hence, supercapacitors with more functions and novel features are fabricated to widen the energy storage applications. The electrochromic (EC) materials are able to exhibit visual color changes upon an applied potential. Therefore, it is highly attractive to combine SC and EC characteristics into one device for bifunctional applications namely electrochromic supercapacitor (EC-SC). The EC-SCs can function as a normal supercapacitor to store energy, at the same time, the energy level of the devices can be sensed by observing the changes in visual colors. In this work, copper-based metal-organic framework/reduced graphene oxide (HKUST-1/rGO) composites were successfully developed as high-performance EC-SC devices via hydrothermal and electrochemical deposition. The asfabricated composites were characterized via X-ray diffraction (XRD), Fourier transform infrared spectrometry (FTIR), Raman spectroscopy, field emission scanning microscopy (FESEM) and electrochemical impedance spectroscopy (EIS). Initially, poly(3,4-ethylenedioxythiophene)-reduced graphene oxide/copper-based metal-organic framework (PEDOT-rGO/HKUST-1) was prepared and electrochromic performance was evaluated. PEDOTrGO/ HKUST-1 exhibited a high coloration efficiency of 176.8 cm2/C with high optical contrast. An electrochromic coloration and bleaching times of 1.1 s and 1.3 s were recorded at 500 nm which proved excellent switching kinetics of PEDOT-rGO/HKUST-1. The similar composite also depicted promising supercapacitive properties with remarkable specific energy and specific capacitance of 21.0 Wh/kg and 360.5 F/g, respectively. The HKUST-1/rGO composite was designed as a negative electrode of an asymmetrical supercapacitor (ASC) device. A vanadium oxide/reduced graphene oxide//copper-based metal-organic framework/reduced graphene oxide (V2O5/rGO//HKUST-1/rGO) ASC device successfully delivered enormous specific energy (31.2 Wh/kg) at a specific power of 656.4 W/kg. Nickel oxide/vanadium oxide/reduced graphene oxide//HKUST-1/rGO (NiO/V2O5/rGO//HKUST-1/rGO) and manganese oxide/ vanadium oxide/reduced graphene oxide//HKUST-1/rGO (MnO2/V2O5/rGO//HKUST- 1/rGO) devices were developed for bifunctional asymmetrical electrochromic supercapacitor (EC-SC) devices. The designed PEDOT-rGO/HKUST-1, V2O5/rGO//HKUST-1/rGO, NiO/V2O5/rGO//HKUST-1/rGO and MnO2/V2O5/rGO//HKUST-1/rGO depicted outstanding specific capacitance of 360.5, 483.9, 500 and 652.7 F/g, respectively. Both bifunctional asymmetric ECSC devices (NiO/V2O5/rGO//HKUST-1/rGO and MnO2/V2O5/rGO//HKUST- 1/rGO) were also demonstrated green and orange color at the discharged and charged state, respectively. These results proved that the successfully prepared asymmetrical EC-SC devices with both excellent charge storage capability and outstanding electrochromic properties are promising candidates for bifunctional application. Graphene - Oxidation Supercapacitors Electrochromic devices 2021-09 Thesis http://psasir.upm.edu.my/id/eprint/92753/ http://psasir.upm.edu.my/id/eprint/92753/1/FS%202021%2027%20-%20IR.pdf text en public doctoral Universiti Putra Malaysia Graphene - Oxidation Supercapacitors Electrochromic devices Sulaiman, Yusran |
institution |
Universiti Putra Malaysia |
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PSAS Institutional Repository |
language |
English |
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Sulaiman, Yusran |
topic |
Graphene - Oxidation Supercapacitors Electrochromic devices |
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Graphene - Oxidation Supercapacitors Electrochromic devices Mohanadas, Dharshini Development of high-performance electrochromic supercapacitors using copper-based metal-organic framework/reduced graphene oxide composites |
description |
Supercapacitors (SCs) are promising energy storage devices with tremendous
specific capacitance, fast rate for charging/discharging, high specific power and
long-life cycle. It is difficult to estimate the state-of-charge of the existing
supercapacitors, which leads to excessive charging/discharging. Hence,
supercapacitors with more functions and novel features are fabricated to widen
the energy storage applications. The electrochromic (EC) materials are able to
exhibit visual color changes upon an applied potential. Therefore, it is highly
attractive to combine SC and EC characteristics into one device for bifunctional
applications namely electrochromic supercapacitor (EC-SC). The EC-SCs can
function as a normal supercapacitor to store energy, at the same time, the energy
level of the devices can be sensed by observing the changes in visual colors. In
this work, copper-based metal-organic framework/reduced graphene oxide
(HKUST-1/rGO) composites were successfully developed as high-performance
EC-SC devices via hydrothermal and electrochemical deposition. The asfabricated
composites were characterized via X-ray diffraction (XRD), Fourier
transform infrared spectrometry (FTIR), Raman spectroscopy, field emission
scanning microscopy (FESEM) and electrochemical impedance spectroscopy
(EIS). Initially, poly(3,4-ethylenedioxythiophene)-reduced graphene
oxide/copper-based metal-organic framework (PEDOT-rGO/HKUST-1) was
prepared and electrochromic performance was evaluated. PEDOTrGO/
HKUST-1 exhibited a high coloration efficiency of 176.8 cm2/C with high
optical contrast. An electrochromic coloration and bleaching times of 1.1 s and
1.3 s were recorded at 500 nm which proved excellent switching kinetics of
PEDOT-rGO/HKUST-1. The similar composite also depicted promising
supercapacitive properties with remarkable specific energy and specific capacitance of 21.0 Wh/kg and 360.5 F/g, respectively. The HKUST-1/rGO
composite was designed as a negative electrode of an asymmetrical
supercapacitor (ASC) device. A vanadium oxide/reduced graphene
oxide//copper-based metal-organic framework/reduced graphene oxide
(V2O5/rGO//HKUST-1/rGO) ASC device successfully delivered enormous
specific energy (31.2 Wh/kg) at a specific power of 656.4 W/kg. Nickel
oxide/vanadium oxide/reduced graphene oxide//HKUST-1/rGO
(NiO/V2O5/rGO//HKUST-1/rGO) and manganese oxide/ vanadium
oxide/reduced graphene oxide//HKUST-1/rGO (MnO2/V2O5/rGO//HKUST-
1/rGO) devices were developed for bifunctional asymmetrical electrochromic
supercapacitor (EC-SC) devices. The designed PEDOT-rGO/HKUST-1,
V2O5/rGO//HKUST-1/rGO, NiO/V2O5/rGO//HKUST-1/rGO and
MnO2/V2O5/rGO//HKUST-1/rGO depicted outstanding specific capacitance of
360.5, 483.9, 500 and 652.7 F/g, respectively. Both bifunctional asymmetric ECSC
devices (NiO/V2O5/rGO//HKUST-1/rGO and MnO2/V2O5/rGO//HKUST-
1/rGO) were also demonstrated green and orange color at the discharged and
charged state, respectively. These results proved that the successfully prepared
asymmetrical EC-SC devices with both excellent charge storage capability and
outstanding electrochromic properties are promising candidates for bifunctional
application. |
format |
Thesis |
qualification_level |
Doctorate |
author |
Mohanadas, Dharshini |
author_facet |
Mohanadas, Dharshini |
author_sort |
Mohanadas, Dharshini |
title |
Development of high-performance electrochromic supercapacitors using copper-based metal-organic framework/reduced graphene oxide composites |
title_short |
Development of high-performance electrochromic supercapacitors using copper-based metal-organic framework/reduced graphene oxide composites |
title_full |
Development of high-performance electrochromic supercapacitors using copper-based metal-organic framework/reduced graphene oxide composites |
title_fullStr |
Development of high-performance electrochromic supercapacitors using copper-based metal-organic framework/reduced graphene oxide composites |
title_full_unstemmed |
Development of high-performance electrochromic supercapacitors using copper-based metal-organic framework/reduced graphene oxide composites |
title_sort |
development of high-performance electrochromic supercapacitors using copper-based metal-organic framework/reduced graphene oxide composites |
granting_institution |
Universiti Putra Malaysia |
publishDate |
2021 |
url |
http://psasir.upm.edu.my/id/eprint/92753/1/FS%202021%2027%20-%20IR.pdf |
_version_ |
1747813758928945152 |