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dc.contributor.author선양국-
dc.date.accessioned2018-03-15T05:52:03Z-
dc.date.available2018-03-15T05:52:03Z-
dc.date.issued2014-07-
dc.identifier.citationCHEMPHYSCHEM, 2014, 15(10), P.2070-2076en_US
dc.identifier.issn1439-4235-
dc.identifier.urihttps://onlinelibrary.wiley.com/doi/abs/10.1002/cphc.201400054-
dc.description.abstractA new physical pulverization strategy has been developed to prepare a highly active composite of CoOx and crushed graphite (CG) for the cathode in lithium-oxygen batteries. The effect of CoOx loading on the charge potential in the oxygen evolution reaction (Li2O2 -> 2Li(+) + O-2 + 2e(-)) was investigated in coin-cell tests. The CoOx (38.9 wt%)/CG composite showed a low charge potential of 3.92 V with a delivered capacity of 2 mAh cm(-2) under a current density of 0.2 mA cm(-2). The charge potential was 4.10 and 4.15 V at a capacity of 5 and 10 mAh cm(-2), respectively, with a current density of 0.5 mA cm(-2). The stability of the electrolyte and discharge product on the gas-diffusion layer after the cycling were preliminarily characterized by H-1 nuclear magnetic resonance spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The high activity of the composite was further analyzed by electrochemical impedance spectroscopy, cyclic voltammetry, and potential-step chronoamperometry. The results indicate that our near-dry milling method is an effective and green approach to preparing a nanocomposite cathode with high surface area and porosity, while using less solvent. Its relative simplicity compared with the traditional solution method could facilitate its widespread application in catalysis, energy storage, and materials science.en_US
dc.description.sponsorshipThis work was supported by the Human Resources Development program (20124010203290) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korean government's Ministry of Trade, Industry and Energy. It was also supported by a National Research Foundation of KOREA (NRF) grant funded by the Korean government (MEST; 2009-0092780). This work was also funded by the U.S. Department of Energy under Contract DE-AC0206CH11357 with the main support provided by the Vehicle Technologies Office, Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE).en_US
dc.language.isoenen_US
dc.publisherWILEY-V C H VERLAG GMBHen_US
dc.subjectbatteriesen_US
dc.subjectcobalten_US
dc.subjectgraphiteen_US
dc.subjectmaterial scienceen_US
dc.subjectsynthetic methodsen_US
dc.titleA Physical Pulverization Strategy for Preparing a Highly Active Composite of CoOx and Crushed Graphite for Lithium-Oxygen Batteriesen_US
dc.typeArticleen_US
dc.relation.volume15-
dc.identifier.doi10.1002/cphc.201400054-
dc.relation.page2070-2076-
dc.relation.journalCHEMPHYSCHEM-
dc.contributor.googleauthorMing, Jun-
dc.contributor.googleauthorKwak, Won-Jin-
dc.contributor.googleauthorPark, Jin-Bum-
dc.contributor.googleauthorShin, Chang-Dae-
dc.contributor.googleauthorSun, Yang-Kook-
dc.contributor.googleauthorLu, Jun-
dc.contributor.googleauthorAmine, Khalil-
dc.contributor.googleauthorCurtiss, Larry-
dc.relation.code2014027141-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDEPARTMENT OF ENERGY ENGINEERING-
dc.identifier.pidyksun-
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COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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