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곽상규

Kwak, Sang Kyu
Kyu’s MolSim Lab @ UNIST
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dc.citation.endPage 514 -
dc.citation.startPage 505 -
dc.citation.title ENERGY STORAGE MATERIALS -
dc.citation.volume 31 -
dc.contributor.author Jeon, Yuju -
dc.contributor.author Kang, Sujin -
dc.contributor.author Joo, Se Hun -
dc.contributor.author Cho, Minjae -
dc.contributor.author Park, Sung O. -
dc.contributor.author Liu, Nian -
dc.contributor.author Kwak, Sang Kyu -
dc.contributor.author Lee, Hyun-Wook -
dc.contributor.author Song, Hyun-Kon -
dc.date.accessioned 2023-12-21T16:49:49Z -
dc.date.available 2023-12-21T16:49:49Z -
dc.date.created 2020-10-30 -
dc.date.issued 2020-10 -
dc.description.abstract The reversibility of lithium plating/stripping should be guaranteed in lithium metal batteries. Seriously localized lithium growth during plating leads to the dendritic evolution of lithium metal due to the uneven current distribution on the electrically conductive surface. Artificial protective layers covering electrodes (e.g., polymer film on copper foil) have been used to narrow the gap of the current density between positions on the conductive surface. Herein, we incorporated an active ingredient to attract lithium ions into the dendrite-suppressing layer. Pyridinic nitrogen of graphitic carbon nitride (g-C3N4) served as the lithium ion affinity center. Conformation of the nitrogen changed from pyridinic to graphitic in the presence of lithium ions, which confirms the coordination of lithium ion to the pyridinic nitrogen. Moreover, lithium ion conduction was facilitated in the presence of g-C3N4 layer probably via a site-to-site hopping mechanism. Lithium metal was plated between the g-C3N4 layer and the copper current collector (or the lithium metal). The homogeneous lithium nucleation expected from the active role of the pyridinic nitrogen (lithium ion affinity and facilitated ionic conduction) suppressed the dendritic growth of lithium metal and decreased the overpotential required for the initial metal nucleation. Due to the top down ion flux regulation on the uppermost surface (or tip) of lithium metal, the reversibility of lithium plating/ stripping was dramatically improved. -
dc.identifier.bibliographicCitation ENERGY STORAGE MATERIALS, v.31, pp.505 - 514 -
dc.identifier.doi 10.1016/j.ensm.2020.06.041 -
dc.identifier.issn 2405-8297 -
dc.identifier.scopusid 2-s2.0-85089382793 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/48680 -
dc.identifier.url https://www.sciencedirect.com/science/article/pii/S2405829720302634 -
dc.identifier.wosid 000577150900006 -
dc.language 영어 -
dc.publisher ELSEVIER -
dc.title Pyridinic-to-graphitic conformational change of nitrogen in graphitic carbon nitride by lithium coordination during lithium plating -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary -
dc.relation.journalResearchArea Chemistry; Science & Technology - Other Topics; Materials Science -
dc.type.docType Article -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor Graphitic carbon nitride (g-C3N4) -
dc.subject.keywordAuthor Pyridinic nitrogen -
dc.subject.keywordAuthor Graphitic nitrogen -
dc.subject.keywordAuthor Lithium coordination -
dc.subject.keywordAuthor Lithium metal battery -
dc.subject.keywordPlus TOTAL-ENERGY CALCULATIONS -
dc.subject.keywordPlus METAL -
dc.subject.keywordPlus DEPOSITION -
dc.subject.keywordPlus ANODE -

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