Improving The Symmetry Of Asymmetric Supercapacitors Using Battery-Type Positive Electrodes And Activated Carbon Negative Electrodes By Mass And Charge Balance

Improving The Symmetry Of Asymmetric Supercapacitors Using Battery-Type Positive Electrodes And Activated Carbon Negative Electrodes By Mass And Charge Balance

Asymmetric supercapacitors (ASCs) are routinely fabricated using battery-type electrode materials as a positive electrode and electrochemical double layer materials as a negative electrode; the mass-loading in the electrodes is determined by assuming both to be capacitive charge storage materials. T...

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Main Authors: Krishnan, Syam G., Harilal, Midhun, Pal, Bhupender, Izan Izwan, Misnon, Karuppaiah, Chelladurai, Yang, Chun-Chen, Rajan, Jose
Format: Article
Language:English
Published: Elsevier 2017
Subjects:
Q Science (General)
QC Physics
QD Chemistry
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://umpir.ump.edu.my/id/eprint/19283/
http://umpir.ump.edu.my/id/eprint/19283/
http://umpir.ump.edu.my/id/eprint/19283/
http://umpir.ump.edu.my/id/eprint/19283/7/fist-2017-Rjose-Improving%20the%20symmetry%20of%20asymmetric%20supercapacitors1.pdf
id ump-19283
recordtype eprints
spelling ump-192832018-07-26T02:51:15Z http://umpir.ump.edu.my/id/eprint/19283/ Improving The Symmetry Of Asymmetric Supercapacitors Using Battery-Type Positive Electrodes And Activated Carbon Negative Electrodes By Mass And Charge Balance Krishnan, Syam G. Harilal, Midhun Pal, Bhupender Izan Izwan, Misnon Karuppaiah, Chelladurai Yang, Chun-Chen Rajan, Jose Q Science (General) QC Physics QD Chemistry TK Electrical engineering. Electronics Nuclear engineering Asymmetric supercapacitors (ASCs) are routinely fabricated using battery-type electrode materials as a positive electrode and electrochemical double layer materials as a negative electrode; the mass-loading in the electrodes is determined by assuming both to be capacitive charge storage materials. This protocol is erroneous as the cyclic voltammograms and galvanostatic charge-discharge curves of the resulting devices showed dissimilarity in the stored charges of the two electrodes and battery-type behaviors, respectively. Herein, we show by employing two choices of battery-type electrodes as positive electrodes and commercial activated carbon as negative electrode in 3 M LiOH electrolyte that equal mass loading in both electrodes leads to supercapacitive charge storage. The positive electrode to negative electrode mass ratio is varied from 0.75 to 1.5 in a mass interval of 0.25 which includes a mass ratio of the conventional method. The electrochemical studies of the fabricated ASCs show that the charge storage capabilities depend on the electrode mass. Electrochemical impedance spectroscopy studies show that the equal mass ratio has low series and charge transfer resistances and wider frequency dispersion of capacitance. Elsevier 2017-10-16 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/19283/7/fist-2017-Rjose-Improving%20the%20symmetry%20of%20asymmetric%20supercapacitors1.pdf Krishnan, Syam G. and Harilal, Midhun and Pal, Bhupender and Izan Izwan, Misnon and Karuppaiah, Chelladurai and Yang, Chun-Chen and Rajan, Jose (2017) Improving The Symmetry Of Asymmetric Supercapacitors Using Battery-Type Positive Electrodes And Activated Carbon Negative Electrodes By Mass And Charge Balance. Journal of Electroanalytical Chemistry, 805. pp. 126-132. ISSN 1572-6657 https://doi.org/10.1016/j.jelechem.2017.10.029 doi.org/10.1016/j.jelechem.2017.10.029
repository_type Digital Repository
institution_category Local University
institution Universiti Malaysia Pahang
building UMP Institutional Repository
collection Online Access
language English
topic Q Science (General)
QC Physics
QD Chemistry
TK Electrical engineering. Electronics Nuclear engineering
spellingShingle Q Science (General)
QC Physics
QD Chemistry
TK Electrical engineering. Electronics Nuclear engineering
Krishnan, Syam G.
Harilal, Midhun
Pal, Bhupender
Izan Izwan, Misnon
Karuppaiah, Chelladurai
Yang, Chun-Chen
Rajan, Jose
Improving The Symmetry Of Asymmetric Supercapacitors Using Battery-Type Positive Electrodes And Activated Carbon Negative Electrodes By Mass And Charge Balance
description Asymmetric supercapacitors (ASCs) are routinely fabricated using battery-type electrode materials as a positive electrode and electrochemical double layer materials as a negative electrode; the mass-loading in the electrodes is determined by assuming both to be capacitive charge storage materials. This protocol is erroneous as the cyclic voltammograms and galvanostatic charge-discharge curves of the resulting devices showed dissimilarity in the stored charges of the two electrodes and battery-type behaviors, respectively. Herein, we show by employing two choices of battery-type electrodes as positive electrodes and commercial activated carbon as negative electrode in 3 M LiOH electrolyte that equal mass loading in both electrodes leads to supercapacitive charge storage. The positive electrode to negative electrode mass ratio is varied from 0.75 to 1.5 in a mass interval of 0.25 which includes a mass ratio of the conventional method. The electrochemical studies of the fabricated ASCs show that the charge storage capabilities depend on the electrode mass. Electrochemical impedance spectroscopy studies show that the equal mass ratio has low series and charge transfer resistances and wider frequency dispersion of capacitance.
format Article
author Krishnan, Syam G.
Harilal, Midhun
Pal, Bhupender
Izan Izwan, Misnon
Karuppaiah, Chelladurai
Yang, Chun-Chen
Rajan, Jose
author_facet Krishnan, Syam G.
Harilal, Midhun
Pal, Bhupender
Izan Izwan, Misnon
Karuppaiah, Chelladurai
Yang, Chun-Chen
Rajan, Jose
author_sort Krishnan, Syam G.
title Improving The Symmetry Of Asymmetric Supercapacitors Using Battery-Type Positive Electrodes And Activated Carbon Negative Electrodes By Mass And Charge Balance
title_short Improving The Symmetry Of Asymmetric Supercapacitors Using Battery-Type Positive Electrodes And Activated Carbon Negative Electrodes By Mass And Charge Balance
title_full Improving The Symmetry Of Asymmetric Supercapacitors Using Battery-Type Positive Electrodes And Activated Carbon Negative Electrodes By Mass And Charge Balance
title_fullStr Improving The Symmetry Of Asymmetric Supercapacitors Using Battery-Type Positive Electrodes And Activated Carbon Negative Electrodes By Mass And Charge Balance
title_full_unstemmed Improving The Symmetry Of Asymmetric Supercapacitors Using Battery-Type Positive Electrodes And Activated Carbon Negative Electrodes By Mass And Charge Balance
title_sort improving the symmetry of asymmetric supercapacitors using battery-type positive electrodes and activated carbon negative electrodes by mass and charge balance
publisher Elsevier
publishDate 2017
url http://umpir.ump.edu.my/id/eprint/19283/
http://umpir.ump.edu.my/id/eprint/19283/
http://umpir.ump.edu.my/id/eprint/19283/
http://umpir.ump.edu.my/id/eprint/19283/7/fist-2017-Rjose-Improving%20the%20symmetry%20of%20asymmetric%20supercapacitors1.pdf
first_indexed 2023-09-18T22:27:39Z
last_indexed 2023-09-18T22:27:39Z
_version_ 1777416074304684032

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