Ionomer-Liquid Electrolyte Hybrid Ionic Conductor for High Cycling Stability of Lithium Metal Electrodes

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dc.contributor.authorSong, Jongchanko
dc.contributor.authorLee, Hongkyungko
dc.contributor.authorChoo, Min-Juko
dc.contributor.authorPark, Jung-Kiko
dc.contributor.authorKim, Hee-Takko
dc.date.accessioned2016-04-20T06:27:46Z-
dc.date.available2016-04-20T06:27:46Z-
dc.date.created2015-10-19-
dc.date.created2015-10-19-
dc.date.issued2015-09-
dc.identifier.citationSCIENTIFIC REPORTS, v.5-
dc.identifier.issn2045-2322-
dc.identifier.urihttp://hdl.handle.net/10203/205354-
dc.description.abstractThe inhomogeneous Li electrodeposition of lithium metal electrode has been a major impediment to the realization of rechargeable lithium metal batteries. Although single ion conducting ionomers can induce more homogeneous Li electrodeposition by preventing Li+ depletion at Li surface, currently available materials do not allow room-temperature operation due to their low room temperature conductivities. In the paper, we report that a highly conductive ionomer/liquid electrolyte hybrid layer tightly laminated on Li metal electrode can realize stable Li electrodeposition at high current densities up to 10 mA cm(-2) and permit room-temperature operation of corresponding Li metal batteries with low polarizations. The hybrid layer is fabricated by laminating few micron-thick Nafion layer on Li metal electrode followed by soaking 1 M LiPF6 EC/DEC (1/1) electrolyte. The Li/Li symmetric cell with the hybrid layer stably operates at a high current density of 10 mA cm(-2) for more than 2000 h, which corresponds to more than five-fold enhancement compared with bare Li metal electrode. Also, the prototype Li/LiCoO2 battery with the hybrid layer offers cycling stability more than 350 cycles. These results demonstrate that the hybrid strategy successfully combines the advantages of bi-ionic liquid electrolyte (fast Li+ transport) and single ionic ionomer (prevention of Li+ depletion).-
dc.languageEnglish-
dc.publisherNATURE PUBLISHING GROUP-
dc.subjectBLOCK-COPOLYMER ELECTROLYTES-
dc.subjectCOMPOSITE PROTECTIVE LAYER-
dc.subjectLITHIATED NAFION IONOMER-
dc.subjectPOLYMER ELECTROLYTES-
dc.subjectLI METAL-
dc.subjectFUNCTIONAL SEPARATOR-
dc.subjectPROPYLENE CARBONATE-
dc.subjectDENDRITE FORMATION-
dc.subjectGEL ELECTROLYTES-
dc.subjectBATTERIES-
dc.titleIonomer-Liquid Electrolyte Hybrid Ionic Conductor for High Cycling Stability of Lithium Metal Electrodes-
dc.typeArticle-
dc.identifier.wosid000361814500001-
dc.identifier.scopusid2-s2.0-84942799089-
dc.type.rimsART-
dc.citation.volume5-
dc.citation.publicationnameSCIENTIFIC REPORTS-
dc.identifier.doi10.1038/srep14458-
dc.embargo.liftdate9999-12-31-
dc.embargo.terms9999-12-31-
dc.contributor.localauthorPark, Jung-Ki-
dc.contributor.localauthorKim, Hee-Tak-
dc.description.isOpenAccessY-
dc.type.journalArticleArticle-
dc.subject.keywordPlusBLOCK-COPOLYMER ELECTROLYTES-
dc.subject.keywordPlusCOMPOSITE PROTECTIVE LAYER-
dc.subject.keywordPlusLITHIATED NAFION IONOMER-
dc.subject.keywordPlusPOLYMER ELECTROLYTES-
dc.subject.keywordPlusLI METAL-
dc.subject.keywordPlusFUNCTIONAL SEPARATOR-
dc.subject.keywordPlusPROPYLENE CARBONATE-
dc.subject.keywordPlusDENDRITE FORMATION-
dc.subject.keywordPlusGEL ELECTROLYTES-
dc.subject.keywordPlusBATTERIES-
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