Graphene quantum dots: Structural integrity and oxygen functional groups for high sulfur/sulfide utilization in lithium sulfur batteries
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 유승호 | - |
dc.date.accessioned | 2022-04-10T09:40:30Z | - |
dc.date.available | 2022-04-10T09:40:30Z | - |
dc.date.created | 2022-04-08 | - |
dc.date.issued | 2016-05 | - |
dc.identifier.issn | 1884-4049 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/139883 | - |
dc.description.abstract | Lithium-sulfur (Li-S) batteries are expected to overcome the limit of current energy storage devices by delivering high specific energy with low material cost. However, the potential of Li-S batteries has not yet been realized because of several technical barriers. Poor electrochemical performance is mainly attributed to the low electrical conductivity of the fully charged and discharged species, the irreversible loss of polysulfide anions and the decrease in the number of electrochemically active reaction sites during battery operation. Here, we report that the introduction of graphene quantum dots (GQDs) into the sulfur cathode dramatically enhanced sulfur/sulfide utilization, yielding high performance. In addition, the GQDs induced structural integrity of the sulfur-carbon electrode composite by oxygen-rich functional groups. This hierarchical architecture enabled fast charge transfer while minimizing the loss of lithium polysulfides, which is attributed to the physicochemical properties of GQDs. The mechanisms through which excellent cycling and rate performance are achieved were thoroughly studied by analyzing capacity versus voltage profiles. Furthermore, experimental observations and theoretical calculations further clarified the role played by GQDs by proving that C-S bon | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | NATURE PUBLISHING GROUPHOUNDMILLSBASINGSTOKE, HAMPSHIRERG21 6XS | - |
dc.title | Graphene quantum dots: Structural integrity and oxygen functional groups for high sulfur/sulfide utilization in lithium sulfur batteries | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | 유승호 | - |
dc.identifier.doi | 10.1038/am.2016.61 | - |
dc.identifier.bibliographicCitation | NPG ASIA MATERIALS, v.8, no.5 | - |
dc.relation.isPartOf | NPG ASIA MATERIALS | - |
dc.citation.title | NPG ASIA MATERIALS | - |
dc.citation.volume | 8 | - |
dc.citation.number | 5 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
(02841) 서울특별시 성북구 안암로 14502-3290-1114
COPYRIGHT © 2021 Korea University. All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.