Potentiostatic and galvanostatic electrodeposition of manganese oxide for supercapacitor application: a comparison study
The structural and electrochemical properties of manganese oxide (MnO2) electrodeposited by potentiostatic and galvanostatic conditions are studied. X‒ray diffraction analyses confirm identical MnO2 phase (ramsdellite) are deposited under potentiostatic and galvanostatic conditions. Under comparable...
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2015
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my.upm.eprints.459162018-05-16T07:59:00Z http://psasir.upm.edu.my/id/eprint/45916/ Potentiostatic and galvanostatic electrodeposition of manganese oxide for supercapacitor application: a comparison study Ali, Gomaa A. M. M. Yusoff, Mashitah Yun, Hau Ng Lim, Hong Ngee Kwok, Feng Chong The structural and electrochemical properties of manganese oxide (MnO2) electrodeposited by potentiostatic and galvanostatic conditions are studied. X‒ray diffraction analyses confirm identical MnO2 phase (ramsdellite) are deposited under potentiostatic and galvanostatic conditions. Under comparable current density during electrodeposition, MnO2 deposited by galvanostatic condition shows smaller crystallite size, less compact layered structure, higher surface area and wider band gap, in comparison to the potentiostatic deposition. The MnO2 morphology difference under different electrodeposition conditions contributes to different capacitive behaviors. The lower compactness of MnO2 deposited galvanostatically renders facile ions diffusion, leading to higher specific capacitance with low equivalent series resistance. The findings suggest galvanostatic electrodeposition is suitable to produce MnO2 nanostructure for supercapacitor application. Elsevier 2015 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/45916/1/Potentiostatic%20and%20galvanostatic%20electrodeposition%20of%20manganese%20oxide%20for%20supercapacitor%20application%20a%20comparison%20study.pdf Ali, Gomaa A. M. and M. Yusoff, Mashitah and Yun, Hau Ng and Lim, Hong Ngee and Kwok, Feng Chong (2015) Potentiostatic and galvanostatic electrodeposition of manganese oxide for supercapacitor application: a comparison study. Current Applied Physics, 15 (6). pp. 1143-1147. ISSN 1567-1739 10.1016/j.cap.2015.06.022 |
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The structural and electrochemical properties of manganese oxide (MnO2) electrodeposited by potentiostatic and galvanostatic conditions are studied. X‒ray diffraction analyses confirm identical MnO2 phase (ramsdellite) are deposited under potentiostatic and galvanostatic conditions. Under comparable current density during electrodeposition, MnO2 deposited by galvanostatic condition shows smaller crystallite size, less compact layered structure, higher surface area and wider band gap, in comparison to the potentiostatic deposition. The MnO2 morphology difference under different electrodeposition conditions contributes to different capacitive behaviors. The lower compactness of MnO2 deposited galvanostatically renders facile ions diffusion, leading to higher specific capacitance with low equivalent series resistance. The findings suggest galvanostatic electrodeposition is suitable to produce MnO2 nanostructure for supercapacitor application. |
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author |
Ali, Gomaa A. M. M. Yusoff, Mashitah Yun, Hau Ng Lim, Hong Ngee Kwok, Feng Chong |
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Ali, Gomaa A. M. M. Yusoff, Mashitah Yun, Hau Ng Lim, Hong Ngee Kwok, Feng Chong Potentiostatic and galvanostatic electrodeposition of manganese oxide for supercapacitor application: a comparison study |
author_facet |
Ali, Gomaa A. M. M. Yusoff, Mashitah Yun, Hau Ng Lim, Hong Ngee Kwok, Feng Chong |
author_sort |
Ali, Gomaa A. M. |
title |
Potentiostatic and galvanostatic electrodeposition of manganese oxide for supercapacitor application: a comparison study |
title_short |
Potentiostatic and galvanostatic electrodeposition of manganese oxide for supercapacitor application: a comparison study |
title_full |
Potentiostatic and galvanostatic electrodeposition of manganese oxide for supercapacitor application: a comparison study |
title_fullStr |
Potentiostatic and galvanostatic electrodeposition of manganese oxide for supercapacitor application: a comparison study |
title_full_unstemmed |
Potentiostatic and galvanostatic electrodeposition of manganese oxide for supercapacitor application: a comparison study |
title_sort |
potentiostatic and galvanostatic electrodeposition of manganese oxide for supercapacitor application: a comparison study |
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Elsevier |
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2015 |
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http://psasir.upm.edu.my/id/eprint/45916/1/Potentiostatic%20and%20galvanostatic%20electrodeposition%20of%20manganese%20oxide%20for%20supercapacitor%20application%20a%20comparison%20study.pdf http://psasir.upm.edu.my/id/eprint/45916/ |
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