An electrochemical approach to graphene oxide coated sulfur for long cycle life
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 유승호 | - |
dc.date.accessioned | 2022-04-10T20:40:24Z | - |
dc.date.available | 2022-04-10T20:40:24Z | - |
dc.date.created | 2022-04-08 | - |
dc.date.issued | 2015-01 | - |
dc.identifier.issn | 2040-3364 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/139937 | - |
dc.description.abstract | Owing to the possibilities of achieving high theoretical energy density and gravimetric capacity, sulfur has been considered as a promising cathode material for rechargeable lithium batteries. However, sulfur shows rapid capacity fading due to the irreversible loss of soluble polysulfides and the decrease in active sites needed for conducting agents. Furthermore, the low electrical conductivity of sulfur hampers the full utilization of active materials. Here we report that graphene oxide coated sulfur composites (GO-S/CB) exhibit improved electrochemical stability as well as enhanced rate performance, evidenced by various electrochemical analyses. The cyclic voltammetry and the galvanostatic cycling analysis revealed that the GO plays key roles in homogenizing the nanocomposite structures of the electrodes, in improving the electrochemical contact, and in minimizing the loss of soluble polysulfide intermediates. An electrochemical impedance spectroscopy analysis also confirms the enhanced structural stability of the GO-S/CB composites after battery operation. As a result, the GO-S/CB exhibited excellent cycle stability and specific capacity as high as ∼723.7 mA h g<sup>-1</sup> even after 100 cycles at 0.5 C. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ROYAL SOCIETY OF CHEMISTRY | - |
dc.title | An electrochemical approach to graphene oxide coated sulfur for long cycle life | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | 유승호 | - |
dc.identifier.doi | 10.1039/c5nr01951f | - |
dc.identifier.bibliographicCitation | NANOSCALE, v.7, no.31, pp.13249 - 13255 | - |
dc.relation.isPartOf | NANOSCALE | - |
dc.citation.title | NANOSCALE | - |
dc.citation.volume | 7 | - |
dc.citation.number | 31 | - |
dc.citation.startPage | 13249 | - |
dc.citation.endPage | 13255 | - |
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.