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Lee, Sang-Young
Energy Soft-Materials Lab.
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dc.citation.endPage 13667 -
dc.citation.number 28 -
dc.citation.startPage 1363 -
dc.citation.title JOURNAL OF PHYSICAL CHEMISTRY B -
dc.citation.volume 109 -
dc.contributor.author Lee, Sang-Young -
dc.contributor.author Yong, HH -
dc.contributor.author Lee, YJ -
dc.contributor.author Kim, SK -
dc.contributor.author Ahn, S -
dc.date.accessioned 2023-12-22T10:36:10Z -
dc.date.available 2023-12-22T10:36:10Z -
dc.date.created 2014-09-18 -
dc.date.issued 2005-07 -
dc.description.abstract It is a common observation that when ionic liquids are added to electrolytes the performances of lithium ion cells become poor, while the thermal safeties of the electrolytes might be improved. In this study, this behavior is investigated based on the kinetics of ionic diffusion. As a model ionic liquid, we chose butyldimethylimidazolium hexafluorophosphate (BDMIPF6). The common solvent was propylene carbonate (PC), and lithium hexafluorophosphate (LiPF6) was selected as the lithium conducting salt. Ionic diffusion coefficients are estimated by using a pulsed field gradient NMR technique. From a basic study on the model electrolytes (BDMIPF6 in PC, UPF6 in PC, and BDMIPF6 + LiPF6 in PC), it was found that the BDMI+ from BDMIPF6 shows larger diffusion coefficients than the Li+ from LiPF6. However, the anionic (PF6-) diffusion coefficients present little difference between the model electrolytes. The higher diffusion coefficient of BDMI+ than that of Li+ suggests that the poor C-rate performance of lithium ion cells containing ionic liquids as an electrolyte component can be attributed to the two-cation competition between Li+ and BDMI+. -
dc.identifier.bibliographicCitation JOURNAL OF PHYSICAL CHEMISTRY B, v.109, no.28, pp.1363 - 13667 -
dc.identifier.doi 10.1021/jp051974m -
dc.identifier.issn 1520-6106 -
dc.identifier.scopusid 2-s2.0-23044441149 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/6211 -
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=23044441149 -
dc.identifier.wosid 000230526800038 -
dc.language 영어 -
dc.publisher AMER CHEMICAL SOC -
dc.title Two-cation competition in ionic-liquid-modified electrolytes for lithium ion batteries -
dc.type Article -
dc.description.journalRegisteredClass scopus -

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