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Fluorinated Covalent Organic Polymers for High Performance Sulfur Cathodes in Lithium-Sulfur Batteries
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Shin, Hyuksoo | - |
dc.contributor.author | Kim, Doyun | - |
dc.contributor.author | Kim, Hyeon Jin | - |
dc.contributor.author | Kim, Jiheon | - |
dc.contributor.author | Char, Kookheon | - |
dc.contributor.author | Yavuz, Cafer T. | - |
dc.contributor.author | Choi, Jang Wook | - |
dc.date.accessioned | 2020-03-16T11:10:44Z | - |
dc.date.available | 2020-03-16T11:10:44Z | - |
dc.date.created | 2020-02-03 | - |
dc.date.created | 2020-02-03 | - |
dc.date.created | 2020-02-03 | - |
dc.date.created | 2020-02-03 | - |
dc.date.issued | 2019-10 | - |
dc.identifier.citation | Chemistry of Materials, Vol.31 No.19, pp.7910-7921 | - |
dc.identifier.issn | 0897-4756 | - |
dc.identifier.other | 90490 | - |
dc.identifier.uri | https://hdl.handle.net/10371/164702 | - |
dc.description.abstract | Lithium-sulfur (Li-S) batteries by far offer higher theoretical energy density than that of the commercial lithium-ion battery counterparts, but suffer predominantly from an irreversible shuttling process involving lithium polysulfides. Here, we report a fluorinated covalent organic polymer (F-COP) as a template for high performance sulfur cathodes in Li-S batteries. The fluorination allowed facile covalent attachment of sulfur to a porous polymer framework via nucleophilic aromatic substitution reaction (SNAr), leading to high sulfur content, e.g., over 70 wt %. The F-COP framework was microporous with 72% of pores within three well-defined pore sizes, viz. 0.58, 1.19, and 1.68 nm, which effectively suppressed polysulfide dissolution via steric and electrostatic hindrance. As a result of the structural features of the F-COP, the resulting sulfur electrode exhibited high electrochemical performance of 1287.7 mAh g(-1) at 0.05C, 96.4% initial Columbic efficiency, 70.3% capacity retention after 1000 cycles at 0.5C, and robust operation for a sulfur loading of up to 4.1 mg(sulfur )cm(-2). Our findings suggest the F-COP family with the adaptability of SNAr chemistry and well-defined microporous structures as useful frameworks for highly sustainable sulfur electrodes in Li-S batteries. | - |
dc.language | 영어 | - |
dc.publisher | American Chemical Society | - |
dc.title | Fluorinated Covalent Organic Polymers for High Performance Sulfur Cathodes in Lithium-Sulfur Batteries | - |
dc.type | Article | - |
dc.contributor.AlternativeAuthor | 최장욱 | - |
dc.contributor.AlternativeAuthor | 차국헌 | - |
dc.identifier.doi | 10.1021/acs.chemmater.9b01986 | - |
dc.citation.journaltitle | Chemistry of Materials | - |
dc.identifier.wosid | 000489678800011 | - |
dc.identifier.scopusid | 2-s2.0-85072970269 | - |
dc.citation.endpage | 7921 | - |
dc.citation.number | 19 | - |
dc.citation.startpage | 7910 | - |
dc.citation.volume | 31 | - |
dc.identifier.sci | 000489678800011 | - |
dc.description.isOpenAccess | N | - |
dc.contributor.affiliatedAuthor | Char, Kookheon | - |
dc.contributor.affiliatedAuthor | Choi, Jang Wook | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | ENHANCED RAMAN-SCATTERING | - |
dc.subject.keywordPlus | POROUS AROMATIC FRAMEWORK | - |
dc.subject.keywordPlus | ELEMENTAL-SULFUR | - |
dc.subject.keywordPlus | ELECTROCHEMICAL IMPEDANCE | - |
dc.subject.keywordPlus | CARBON POLYHEDRA | - |
dc.subject.keywordPlus | POLYSULFIDES | - |
dc.subject.keywordPlus | ENERGY | - |
dc.subject.keywordPlus | LIFE | - |
dc.subject.keywordPlus | NANOCOMPOSITES | - |
dc.subject.keywordPlus | COPOLYMERIZATION | - |
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