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Park, Youngsin
Center for Superfunctional Materials
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Synthesis and enhanced electrochemical supercapacitive properties of manganese oxide nanoflake electrodes

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dc.contributor.author Inamdar, AI ko
dc.contributor.author Jo, Y ko
dc.contributor.author Kim, J ko
dc.contributor.author Han, J ko
dc.contributor.author Pawar, SM ko
dc.contributor.author Kalubarme, RS ko
dc.contributor.author Park, CJ ko
dc.contributor.author Hong, JP ko
dc.contributor.author Park, Youngsin ko
dc.contributor.author Jung, W ko
dc.contributor.author Kim, H ko
dc.contributor.author Im, H ko
dc.date.available 2015-04-02T04:09:54Z -
dc.date.created 2015-04-01 ko
dc.date.issued 2015-04 ko
dc.identifier.citation ENERGY, v.83, pp.532 - 538 ko
dc.identifier.issn 0360-5442 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/11138 -
dc.description.abstract MnO2+δ (Manganese oxide) nanoflakes were synthesized for use as electrode material in electrochemical supercapacitors. The nanoflakes were produced via RF-magnetron sputtering with various excess oxygen contents (δ), and the electrochemical supercapacitive properties of the MnO2+δ nanoflakes were investigated as a function of δ with the use of a Na2SO4 electrolyte. The excess oxygen (δ) induces the MnO2+δ nanoflakes to form a thin open structure, and μ-Raman measurements revealed that the MnO2+δ nanoflakes formed a birnessite phase with a layered structure. X-ray photoelectron spectroscopy was used to obtain quantitative information on both the oxidation state and the chemical composition of the nanoflake electrodes. The crystallinity of the nanoflakes improved when the oxygen partial pressure increased during sputtering. At an optimal δ~0.6, the electrochemical stability and the capacity retention significantly improved, and electrochemical impedance spectroscopy revealed that easy access of Na+ ions into the nanoflakes at an optimal δ value resulted in a low diffusion resistance, playing a key role in determining the improvement in the supercapacitor characteristics. © 2015 Elsevier Ltd ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.publisher PERGAMON-ELSEVIER SCIENCE LTD ko
dc.title Synthesis and enhanced electrochemical supercapacitive properties of manganese oxide nanoflake electrodes ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84926421450 ko
dc.identifier.wosid 000353731200050 ko
dc.type.rims ART ko
dc.description.wostc 0 *
dc.description.scopustc 0 *
dc.date.tcdate 2015-12-28 *
dc.date.scptcdate 2015-11-04 *
dc.identifier.doi 10.1016/j.energy.2015.02.058 ko
dc.identifier.url http://www.sciencedirect.com/science/article/pii/S0360544215002133 ko
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