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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

DC Field Value Language Inamdar, AI ko Jo, Y ko Kim, J ko Han, J ko Pawar, SM ko Kalubarme, RS ko Park, CJ ko Hong, JP ko Park, Youngsin ko Jung, W ko Kim, H ko Im, H ko 2015-04-02T04:09:54Z - 2015-04-01 ko 2015-04 ko
dc.identifier.citation ENERGY, v.83, pp.532 - 538 ko
dc.identifier.issn 0360-5442 ko
dc.identifier.uri -
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.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 * 2015-12-28 * 2015-11-04 *
dc.identifier.doi 10.1016/ ko
dc.identifier.url ko
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