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Synthesis and Characterization of MnCo2O4 Cuboidal Microcrystals as a High Performance Psuedocapacitor Electrode

Manganese cobaltite (MnCo2O4) is currently under screening as a high performance supercapacitor electrode owing to its high theoretical capacitance, improved electrical conductivity and long term cyclic stability. Herein, we report synthesis of MnCo2O4 cuboidal microcrystals using hydrothermal metho...

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Main Authors: Krishnan, Syam G., Mohd Hasbi, Ab. Rahim, Rajan, Jose
Format: Article
Language:English
English
Published: Elsevier Ltd 2016
Subjects:
Q Science (General)
Online Access:http://umpir.ump.edu.my/id/eprint/11135/1/Synthesis%20and%20Characterization%20of%20MnCo2O4%20Cuboidal%20Microcrystals%20as%20a%20High%20Performance%20Psuedocapacitor%20Electrode.pdf
http://umpir.ump.edu.my/id/eprint/11135/7/Synthesis%20and%20Characterization%20of%20MnCo2O4%20Cuboidal%20Microcrystals%20as%20a%20High%20Performance%20Psuedocapacitor%20Electrode.pdf
http://umpir.ump.edu.my/id/eprint/11135/
http://dx.doi.org/10.1016/j.jallcom.2015.10.007
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spelling my.ump.umpir.111352018-11-22T07:50:41Z http://umpir.ump.edu.my/id/eprint/11135/ Synthesis and Characterization of MnCo2O4 Cuboidal Microcrystals as a High Performance Psuedocapacitor Electrode Krishnan, Syam G. Mohd Hasbi, Ab. Rahim Rajan, Jose Q Science (General) Manganese cobaltite (MnCo2O4) is currently under screening as a high performance supercapacitor electrode owing to its high theoretical capacitance, improved electrical conductivity and long term cyclic stability. Herein, we report synthesis of MnCo2O4 cuboidal microcrystals using hydrothermal method and compare its performance with its flakes prepared by solid combustion process. Crystal structure, surface properties, and electrochemical properties of the flakes are studied using X-ray diffraction, gas adsorption, field emission scanning electron microscopy, cyclic voltammetry, galvanostatic charge–discharge cycling, and electrochemical impedance spectroscopy. The electrochemical properties of MnCo2O4 flakes synthesized using hydrothermal synthesis are superior to that synthesized using the solid combustion process. Electrochemical properties of the cuboidal microcrystals (∼specific capacitance, CS ∼600 F g−1 @ 0.5 A g−1) are superior to those synthesized by the combustion process (CS ∼128 F g−1) due to improved faradic utilization of active surface area, layered cuboidal morphology, faster OH− ion penetration owing to higher diffusion coefficient, and larger voltage range available for electrochemical reaction. Elsevier Ltd 2016 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/11135/1/Synthesis%20and%20Characterization%20of%20MnCo2O4%20Cuboidal%20Microcrystals%20as%20a%20High%20Performance%20Psuedocapacitor%20Electrode.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/11135/7/Synthesis%20and%20Characterization%20of%20MnCo2O4%20Cuboidal%20Microcrystals%20as%20a%20High%20Performance%20Psuedocapacitor%20Electrode.pdf Krishnan, Syam G. and Mohd Hasbi, Ab. Rahim and Rajan, Jose (2016) Synthesis and Characterization of MnCo2O4 Cuboidal Microcrystals as a High Performance Psuedocapacitor Electrode. Journal of Alloys and Compounds, 656. pp. 707-713. ISSN 0925-8388 (print), 1873-4669 (online) http://dx.doi.org/10.1016/j.jallcom.2015.10.007 DOI: 10.1016/j.jallcom.2015.10.007
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
English
topic Q Science (General)
spellingShingle Q Science (General)
Krishnan, Syam G.
Mohd Hasbi, Ab. Rahim
Rajan, Jose
Synthesis and Characterization of MnCo2O4 Cuboidal Microcrystals as a High Performance Psuedocapacitor Electrode
description Manganese cobaltite (MnCo2O4) is currently under screening as a high performance supercapacitor electrode owing to its high theoretical capacitance, improved electrical conductivity and long term cyclic stability. Herein, we report synthesis of MnCo2O4 cuboidal microcrystals using hydrothermal method and compare its performance with its flakes prepared by solid combustion process. Crystal structure, surface properties, and electrochemical properties of the flakes are studied using X-ray diffraction, gas adsorption, field emission scanning electron microscopy, cyclic voltammetry, galvanostatic charge–discharge cycling, and electrochemical impedance spectroscopy. The electrochemical properties of MnCo2O4 flakes synthesized using hydrothermal synthesis are superior to that synthesized using the solid combustion process. Electrochemical properties of the cuboidal microcrystals (∼specific capacitance, CS ∼600 F g−1 @ 0.5 A g−1) are superior to those synthesized by the combustion process (CS ∼128 F g−1) due to improved faradic utilization of active surface area, layered cuboidal morphology, faster OH− ion penetration owing to higher diffusion coefficient, and larger voltage range available for electrochemical reaction.
format Article
author Krishnan, Syam G.
Mohd Hasbi, Ab. Rahim
Rajan, Jose
author_facet Krishnan, Syam G.
Mohd Hasbi, Ab. Rahim
Rajan, Jose
author_sort Krishnan, Syam G.
title Synthesis and Characterization of MnCo2O4 Cuboidal Microcrystals as a High Performance Psuedocapacitor Electrode
title_short Synthesis and Characterization of MnCo2O4 Cuboidal Microcrystals as a High Performance Psuedocapacitor Electrode
title_full Synthesis and Characterization of MnCo2O4 Cuboidal Microcrystals as a High Performance Psuedocapacitor Electrode
title_fullStr Synthesis and Characterization of MnCo2O4 Cuboidal Microcrystals as a High Performance Psuedocapacitor Electrode
title_full_unstemmed Synthesis and Characterization of MnCo2O4 Cuboidal Microcrystals as a High Performance Psuedocapacitor Electrode
title_sort synthesis and characterization of mnco2o4 cuboidal microcrystals as a high performance psuedocapacitor electrode
publisher Elsevier Ltd
publishDate 2016
url http://umpir.ump.edu.my/id/eprint/11135/1/Synthesis%20and%20Characterization%20of%20MnCo2O4%20Cuboidal%20Microcrystals%20as%20a%20High%20Performance%20Psuedocapacitor%20Electrode.pdf
http://umpir.ump.edu.my/id/eprint/11135/7/Synthesis%20and%20Characterization%20of%20MnCo2O4%20Cuboidal%20Microcrystals%20as%20a%20High%20Performance%20Psuedocapacitor%20Electrode.pdf
http://umpir.ump.edu.my/id/eprint/11135/
http://dx.doi.org/10.1016/j.jallcom.2015.10.007
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score 13.211869

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