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dc.contributor.author선양국-
dc.date.accessioned2018-08-27T00:53:04Z-
dc.date.available2018-08-27T00:53:04Z-
dc.date.issued2016-07-
dc.identifier.citationENERGY & ENVIRONMENTAL SCIENCE (2016), v. 9, NO. 7, Page. 2334-2345en_US
dc.identifier.issn1754-5706-
dc.identifier.issn1754-5692-
dc.identifier.urihttp://pubs.rsc.org/en/Content/ArticleLanding/2016/EE/C6EE00700G#!divAbstract-
dc.identifier.urihttp://repository.hanyang.ac.kr/handle/20.500.11754/74519-
dc.description.abstractAfter many years of successful and disappointing results, the field of Li–O2 research seems to have reached an equilibrium state. The extensive knowledge that has accrued through advanced analytical studies enables us to delineate the weaknesses of the Li–O2 battery. It is now clear that the instability of the cell components toward extreme conditions existing during cell operation leads to early cell failure as well. One serious challenge is the high oxidation potential applied during the charge process. Redox-mediators may reduce the over-potential and, therefore, improve the efficiency and cyclability of Li–O2 cells. Their use in Li–O2 cells is mandatory. We have previously shown that LiI can indeed behave in such a manner; however, it also promotes the formation of side products during cell operation. We have, therefore, embarked on a comprehensive study of lithium halide salts as electrolytes for use in Li–O2 cells. We examine herein the effect of other components in the cell, such as solvents and contaminants, on the lithium halide salt activity. Based on the electrochemical behavior and the identity of the final cell products under various conditions, we can glean substantial information regarding the detailed operation mechanisms for each specific case. We have concluded that low concentration of LiBr in diglyme solution can improve the cell performance with fewer side effects than LiI. With LiBr, only the desired Li2O2 is formed during discharge. During charge, the bromine redox couple (Br−/Br3−) can reduce the oxidation potential to only 3.5 V. Higher efficiency and better cyclability of cells containing LiBr demonstrate that the electrolyte solution is the key to a successful Li–O2 battery.en_US
dc.description.sponsorshipThis work was supported by the Human Resources Development program (No. 20154010200840) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry and Energy, and also supported by the Global Frontier R&D Program (2013M3A6B1078875) on Center for Hybrid Interface Materials (HIM) funded by the Ministry of Science, ICT & Future Planning. Partial support for this work was obtained from the ISF, Israel Science Foundation, in the framework of the INREP project. AAF thanks the Israel Science Foundation (ISF, Grant no. 1469/13) as well as the Ethel and David Resnick Chair in Active Oxygen Chemistry for their kind and generous support. The authors thank very much Professor Linda Nazar and Professor Jurgen Janek for the fruitful discussions.en_US
dc.language.isoenen_US
dc.publisherROYAL SOC CHEMISTRYen_US
dc.subjectLITHIUM-OXYGEN BATTERIESen_US
dc.subjectEFFICIENT ELECTROCATALYSTen_US
dc.subjectHYDROGEN-PEROXIDEen_US
dc.subjectCARBON CATHODEen_US
dc.subjectAIR BATTERIESen_US
dc.subjectDISCHARGEen_US
dc.subjectCATALYSTen_US
dc.subjectELECTROCHEMISTRYen_US
dc.subjectDECOMPOSITIONen_US
dc.subjectSPECTROSCOPYen_US
dc.titleLi-O-2 cells with LiBr as an electrolyte and a redox mediatoren_US
dc.typeArticleen_US
dc.relation.no7-
dc.relation.volume9-
dc.identifier.doi10.1039/c6ee00700g-
dc.relation.page2334-2345-
dc.relation.journalENERGY & ENVIRONMENTAL SCIENCE-
dc.contributor.googleauthorKwak, Won-Jin-
dc.contributor.googleauthorHirshberg, Daniel-
dc.contributor.googleauthorSharon, Daniel-
dc.contributor.googleauthorAfri, Michal-
dc.contributor.googleauthorFrimer, Aryeh A.-
dc.contributor.googleauthorJung, Hun-Gi-
dc.contributor.googleauthorAurbach, Doron-
dc.contributor.googleauthorSun, Yang-Kook-
dc.relation.code2016002830-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDEPARTMENT OF ENERGY ENGINEERING-
dc.identifier.pidyksun-
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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