Synthesis and Electrochemical Evaluation of the PANI/δ-MnO2 Electrode for High Performing Asymmetric Supercapacitors

Synthesis and Electrochemical Evaluation of the PANI/δ-MnO2 Electrode for High Performing Asymmetric Supercapacitors

A comprehensive analysis on the effect of in-situ polymerization of polyaniline (PANI) on hydrothermally synthesized Birnessite-type MnO2 (δ-MnO2) flowers on the structural, surface, morphological, and electroctrochemical properties are presented in this article. The PANI–MnO2 electrodes showed ~170...

Full description

Bibliographic Details
Main Authors: Izan Izwan, Misnon, Rajan, Jose
Format: Article
Language:English
Published: Royal Society of Chemistry 2017
Subjects:
QC Physics
QD Chemistry
Online Access:http://umpir.ump.edu.my/id/eprint/18227/
http://umpir.ump.edu.my/id/eprint/18227/
http://umpir.ump.edu.my/id/eprint/18227/
http://umpir.ump.edu.my/id/eprint/18227/1/fist-2017-izan-Synthesis%20and%20electrochemical.pdf
id ump-18227
recordtype eprints
spelling ump-182272018-05-02T07:23:05Z http://umpir.ump.edu.my/id/eprint/18227/ Synthesis and Electrochemical Evaluation of the PANI/δ-MnO2 Electrode for High Performing Asymmetric Supercapacitors Izan Izwan, Misnon Rajan, Jose QC Physics QD Chemistry A comprehensive analysis on the effect of in-situ polymerization of polyaniline (PANI) on hydrothermally synthesized Birnessite-type MnO2 (δ-MnO2) flowers on the structural, surface, morphological, and electroctrochemical properties are presented in this article. The PANI–MnO2 electrodes showed ~170% higher specific capacitance than pure MnO2; the factors contributing to this enhancement is systematically investigated and discussed. The PANI modification enabled the inactive surface of the MnO2 to be electrochemically active and reduced the characteristic resistances and charge relaxation time. Furthermore, the PANI modification improved the composite conductivity and resulted in (i) reduction of surface pseudocapacitance from 87% (MnO2) to 54% (PANI–MnO2) and (ii) improvement of active charge contribution from 42% (MnO2) to 46% (PANI–MnO2). The mechanism of these changes is discussed. Furthermore, asymmetric (PANI–MnO2//AC and PANI-MnO2//OMC) and symmetric (AC//AC and OMC//OMC) (where AC is activated carbon and OMC is mesoporous carbon) supercapacitors are fabricated in coin cell casing and evaluated their charge storage properties. Impressive increase in energy storage is observed; however, their properties varied according to porosity of the carbon electrode. Results from this study provide a better understanding on the charge storage behaviour of polymer coated metal oxide electrodes with varied choice of carbons in asymmetric supercapacitors. Royal Society of Chemistry 2017-06-12 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/18227/1/fist-2017-izan-Synthesis%20and%20electrochemical.pdf Izan Izwan, Misnon and Rajan, Jose (2017) Synthesis and Electrochemical Evaluation of the PANI/δ-MnO2 Electrode for High Performing Asymmetric Supercapacitors. New Journal of Chemistry, 41 (14). pp. 6574-6584. ISSN 1144-0546 http://dx.doi.org/10.1039/c7nj00679a doi:10.1039/c7nj00679a
repository_type Digital Repository
institution_category Local University
institution Universiti Malaysia Pahang
building UMP Institutional Repository
collection Online Access
language English
topic QC Physics
QD Chemistry
spellingShingle QC Physics
QD Chemistry
Izan Izwan, Misnon
Rajan, Jose
Synthesis and Electrochemical Evaluation of the PANI/δ-MnO2 Electrode for High Performing Asymmetric Supercapacitors
description A comprehensive analysis on the effect of in-situ polymerization of polyaniline (PANI) on hydrothermally synthesized Birnessite-type MnO2 (δ-MnO2) flowers on the structural, surface, morphological, and electroctrochemical properties are presented in this article. The PANI–MnO2 electrodes showed ~170% higher specific capacitance than pure MnO2; the factors contributing to this enhancement is systematically investigated and discussed. The PANI modification enabled the inactive surface of the MnO2 to be electrochemically active and reduced the characteristic resistances and charge relaxation time. Furthermore, the PANI modification improved the composite conductivity and resulted in (i) reduction of surface pseudocapacitance from 87% (MnO2) to 54% (PANI–MnO2) and (ii) improvement of active charge contribution from 42% (MnO2) to 46% (PANI–MnO2). The mechanism of these changes is discussed. Furthermore, asymmetric (PANI–MnO2//AC and PANI-MnO2//OMC) and symmetric (AC//AC and OMC//OMC) (where AC is activated carbon and OMC is mesoporous carbon) supercapacitors are fabricated in coin cell casing and evaluated their charge storage properties. Impressive increase in energy storage is observed; however, their properties varied according to porosity of the carbon electrode. Results from this study provide a better understanding on the charge storage behaviour of polymer coated metal oxide electrodes with varied choice of carbons in asymmetric supercapacitors.
format Article
author Izan Izwan, Misnon
Rajan, Jose
author_facet Izan Izwan, Misnon
Rajan, Jose
author_sort Izan Izwan, Misnon
title Synthesis and Electrochemical Evaluation of the PANI/δ-MnO2 Electrode for High Performing Asymmetric Supercapacitors
title_short Synthesis and Electrochemical Evaluation of the PANI/δ-MnO2 Electrode for High Performing Asymmetric Supercapacitors
title_full Synthesis and Electrochemical Evaluation of the PANI/δ-MnO2 Electrode for High Performing Asymmetric Supercapacitors
title_fullStr Synthesis and Electrochemical Evaluation of the PANI/δ-MnO2 Electrode for High Performing Asymmetric Supercapacitors
title_full_unstemmed Synthesis and Electrochemical Evaluation of the PANI/δ-MnO2 Electrode for High Performing Asymmetric Supercapacitors
title_sort synthesis and electrochemical evaluation of the pani/δ-mno2 electrode for high performing asymmetric supercapacitors
publisher Royal Society of Chemistry
publishDate 2017
url http://umpir.ump.edu.my/id/eprint/18227/
http://umpir.ump.edu.my/id/eprint/18227/
http://umpir.ump.edu.my/id/eprint/18227/
http://umpir.ump.edu.my/id/eprint/18227/1/fist-2017-izan-Synthesis%20and%20electrochemical.pdf
first_indexed 2023-09-18T22:25:42Z
last_indexed 2023-09-18T22:25:42Z
_version_ 1777415951777529856

Similar Items