Synthesis of an Al2O3-coated polyimide nanofiber mat and its electrochemical characteristics as a separator for lithium ion batteries

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dc.contributor.authorLee, Juneunko
dc.contributor.authorLee, Cho Longko
dc.contributor.authorPark, Kyusungko
dc.contributor.authorKim, Il-Dooko
dc.date.accessioned2014-09-04T08:19:48Z-
dc.date.available2014-09-04T08:19:48Z-
dc.date.created2013-11-11-
dc.date.created2013-11-11-
dc.date.issued2014-02-
dc.identifier.citationJOURNAL OF POWER SOURCES, v.248, pp.1211 - 1217-
dc.identifier.issn0378-7753-
dc.identifier.urihttp://hdl.handle.net/10203/189946-
dc.description.abstractPolyimide (PI) nanofibers with an average diameter of 300 nm, possessing superior electrolyte wettability and thermal stability, are synthesized by electrospinning a poly(amic acid) (PAA) solution followed by an imidization process. The large pore volume of the PI nanofiber mat can facilitate faster Li+-ion transport and greater rate capability, but it also cause an irreversible increase in cell impedance during long term cycling. To overcome these problems, thin Al2O3 over-layers are coated on both sides of a PI separator via a dip-coating process. The Al2O3-coated PI separators exhibit enhanced capacity, cyclability (95.53% retention after 200 cycles at 1 C), and rate capabilities (78.91% at 10 C) compared to the bare PI separator (68.65% at 10 C) and a commercial polypropylene separator (18.25% at 10 C) with a limited increase of cell impedance. (C) 2013 Elsevier B.V. All rights reserved.-
dc.languageEnglish-
dc.publisherELSEVIER SCIENCE BV-
dc.subjectFIBROUS POLYMER ELECTROLYTES-
dc.subjectCERAMIC-COATED SEPARATORS-
dc.subjectCOMPOSITE SEPARATORS-
dc.subjectCYCLING PERFORMANCE-
dc.subjectTHERMAL-STABILITY-
dc.subjectCATHODE MATERIALS-
dc.subjectNONWOVEN-
dc.subjectMEMBRANE-
dc.subjectNANOPARTICLES-
dc.subjectPVDF-
dc.titleSynthesis of an Al2O3-coated polyimide nanofiber mat and its electrochemical characteristics as a separator for lithium ion batteries-
dc.typeArticle-
dc.identifier.wosid000330551000154-
dc.identifier.scopusid2-s2.0-84887713259-
dc.type.rimsART-
dc.citation.volume248-
dc.citation.beginningpage1211-
dc.citation.endingpage1217-
dc.citation.publicationnameJOURNAL OF POWER SOURCES-
dc.identifier.doi10.1016/j.jpowsour.2013.10.056-
dc.embargo.liftdate9999-12-31-
dc.embargo.terms9999-12-31-
dc.contributor.localauthorKim, Il-Doo-
dc.contributor.nonIdAuthorLee, Juneun-
dc.contributor.nonIdAuthorPark, Kyusung-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorLithium ion battery-
dc.subject.keywordAuthorNonwoven separator-
dc.subject.keywordAuthorElectrospinning-
dc.subject.keywordAuthorPolyimide-
dc.subject.keywordAuthorComposite-
dc.subject.keywordAuthorDip-coating-
dc.subject.keywordPlusFIBROUS POLYMER ELECTROLYTES-
dc.subject.keywordPlusCERAMIC-COATED SEPARATORS-
dc.subject.keywordPlusCOMPOSITE SEPARATORS-
dc.subject.keywordPlusCYCLING PERFORMANCE-
dc.subject.keywordPlusTHERMAL-STABILITY-
dc.subject.keywordPlusCATHODE MATERIALS-
dc.subject.keywordPlusNONWOVEN-
dc.subject.keywordPlusMEMBRANE-
dc.subject.keywordPlusNANOPARTICLES-
dc.subject.keywordPlusPVDF-
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