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Effect of pH on morphology and supercapacitive properties of manganese oxide/polypyrrole nanocomposite

In the present work, manganese oxide/polypyrrole (MnO2/PPy) nanocomposites with compact sheet, fibrous-porous, and granular morphologies were successfully synthesized using a simple, one step in situ chemical synthesis method. Their morphologies were tunable by varying the pH of the reactant's...

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Main Authors: Gan, J.K., Lim, Y.S., Huang, N.M., Lim, H.N.
Format: Article
Published: Elsevier 2015
Subjects:
QC Physics
QD Chemistry
Online Access:http://eprints.um.edu.my/16491/
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spelling my.um.eprints.164912019-02-12T09:10:45Z http://eprints.um.edu.my/16491/ Effect of pH on morphology and supercapacitive properties of manganese oxide/polypyrrole nanocomposite Gan, J.K. Lim, Y.S. Huang, N.M. Lim, H.N. QC Physics QD Chemistry In the present work, manganese oxide/polypyrrole (MnO2/PPy) nanocomposites with compact sheet, fibrous-porous, and granular morphologies were successfully synthesized using a simple, one step in situ chemical synthesis method. Their morphologies were tunable by varying the pH of the reactant's solution, which was very simple and scalable. Moreover, their electrochemical behaviors were greatly influenced by the pH of the reactant's solution. The optimum pH condition was found to be 4.0, producing an MnO2/PPy nanocomposite with high porosity. The porosity of the nanocomposite effectively improved its specific surface area, and its pore accessibility enabled the rapid intercalation/deintercalation of the electrolyte. As a result, a high specific capacitance of up to 312 F g(-1) at 10 mV s(-1) was obtained for the porous nanocomposite. A symmetric supercapacitor device built from the porous MnO2/PPy nanocomposite yielded a specific capacitance of 142 F g(-1) per mass of one electrode and exhibited remarkable cycling stability, with 93.2% capacitance retention over 1000 charge/discharge cycles. These features show the promise of porous MnO2/PPy nanocomposite as an electrode material for high-performance supercapacitors. (C) 2015 Elsevier B.V. All rights reserved. Elsevier 2015 Article PeerReviewed Gan, J.K. and Lim, Y.S. and Huang, N.M. and Lim, H.N. (2015) Effect of pH on morphology and supercapacitive properties of manganese oxide/polypyrrole nanocomposite. Applied Surface Science, 357 (A). pp. 479-486. ISSN 0169-4332 doi:10.1016/j.apsusc.2015.09.071
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QC Physics
QD Chemistry
spellingShingle QC Physics
QD Chemistry
Gan, J.K.
Lim, Y.S.
Huang, N.M.
Lim, H.N.
Effect of pH on morphology and supercapacitive properties of manganese oxide/polypyrrole nanocomposite
description In the present work, manganese oxide/polypyrrole (MnO2/PPy) nanocomposites with compact sheet, fibrous-porous, and granular morphologies were successfully synthesized using a simple, one step in situ chemical synthesis method. Their morphologies were tunable by varying the pH of the reactant's solution, which was very simple and scalable. Moreover, their electrochemical behaviors were greatly influenced by the pH of the reactant's solution. The optimum pH condition was found to be 4.0, producing an MnO2/PPy nanocomposite with high porosity. The porosity of the nanocomposite effectively improved its specific surface area, and its pore accessibility enabled the rapid intercalation/deintercalation of the electrolyte. As a result, a high specific capacitance of up to 312 F g(-1) at 10 mV s(-1) was obtained for the porous nanocomposite. A symmetric supercapacitor device built from the porous MnO2/PPy nanocomposite yielded a specific capacitance of 142 F g(-1) per mass of one electrode and exhibited remarkable cycling stability, with 93.2% capacitance retention over 1000 charge/discharge cycles. These features show the promise of porous MnO2/PPy nanocomposite as an electrode material for high-performance supercapacitors. (C) 2015 Elsevier B.V. All rights reserved.
format Article
author Gan, J.K.
Lim, Y.S.
Huang, N.M.
Lim, H.N.
author_facet Gan, J.K.
Lim, Y.S.
Huang, N.M.
Lim, H.N.
author_sort Gan, J.K.
title Effect of pH on morphology and supercapacitive properties of manganese oxide/polypyrrole nanocomposite
title_short Effect of pH on morphology and supercapacitive properties of manganese oxide/polypyrrole nanocomposite
title_full Effect of pH on morphology and supercapacitive properties of manganese oxide/polypyrrole nanocomposite
title_fullStr Effect of pH on morphology and supercapacitive properties of manganese oxide/polypyrrole nanocomposite
title_full_unstemmed Effect of pH on morphology and supercapacitive properties of manganese oxide/polypyrrole nanocomposite
title_sort effect of ph on morphology and supercapacitive properties of manganese oxide/polypyrrole nanocomposite
publisher Elsevier
publishDate 2015
url http://eprints.um.edu.my/16491/
_version_ 1643690289039147008
score 13.211869

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