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Open AccessFeature PaperArticle

A Rapid Synthesis of Mesoporous Mn2O3 Nanoparticles for Supercapacitor Applications

1
School of Semiconductor and Chemical Engineering & Solar Energy Research Center, Chonbuk National University, Jeonju 54896, Korea
2
New and Renewable Energy Materials Development Center (NewREC), Chonbuk National University, Jeonbuk 54896, Korea
*
Authors to whom correspondence should be addressed.
Coatings 2019, 9(10), 631; https://doi.org/10.3390/coatings9100631
Received: 20 August 2019 / Revised: 20 September 2019 / Accepted: 24 September 2019 / Published: 30 September 2019
(This article belongs to the Special Issue Mesoporous Metal Oxide Films)
Mn2O3 nanomaterials have been recently composing a variety of electrochemical systems like fuel cells, supercapacitors, etc., due to their high specific capacitance, low cost, abundance and environmentally benign nature. In this work, mesoporous Mn2O3 nanoparticles (NPs) were synthesized by manganese acetate, citric acid and sodium hydroxide through a hydrothermal process at 150 °C for 3 h. The synthesized mesoporous Mn2O3 NPs were thoroughly characterized in terms of their morphology, surfaces, as well as their crystalline, electrochemical and electrochemical properties. For supercapacitor applications, the synthesized mesoporous Mn2O3 NP-based electrode accomplished an excellent specific capacitance (Csp) of 460 F·g−1 at 10 mV·s−1 with a good electrocatalytic activity by observing good electrochemical properties in a 6 M KOH electrolyte. The excellent Csp might be explained by the improvement of the surface area, porous surface and uniformity, which might favor the generation of large active sites and a fast ionic transport over the good electrocatalytic surface of the Mn2O3 electrode. The fabricated supercapacitors exhibited a good cycling stability after 5000 cycles by maintaining ~83% of Csp. View Full-Text
Keywords: Mn2O3; mesoporous materials; electrochemical characterizations; electrode; supercapacitors Mn2O3; mesoporous materials; electrochemical characterizations; electrode; supercapacitors
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Son, Y.-H.; Bui, P.T.M.; Lee, H.-R.; Akhtar, M.S.; Shah, D.K.; Yang, O.-B. A Rapid Synthesis of Mesoporous Mn2O3 Nanoparticles for Supercapacitor Applications. Coatings 2019, 9, 631.

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