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DC Field | Value | Language |
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dc.citation.endPage | 3300 | - |
dc.citation.number | 5 | - |
dc.citation.startPage | 3292 | - |
dc.citation.title | NANO LETTERS | - |
dc.citation.volume | 16 | - |
dc.contributor.author | Yoo, JongTae | - |
dc.contributor.author | Cho, Sung-Ju | - |
dc.contributor.author | Jung, Gwan Yeong | - |
dc.contributor.author | Kim, Su Hwan | - |
dc.contributor.author | Choi, Keun-Ho | - |
dc.contributor.author | Kim, Jeong-Hoon | - |
dc.contributor.author | Lee, Chang Kee | - |
dc.contributor.author | Kwak, Sang Kyu | - |
dc.contributor.author | Lee, Sang-Young | - |
dc.date.accessioned | 2023-12-21T23:44:03Z | - |
dc.date.available | 2023-12-21T23:44:03Z | - |
dc.date.created | 2016-06-03 | - |
dc.date.issued | 2016-05 | - |
dc.description.abstract | The hierarchical porous structure has garnered considerable attention as a multiscale engineering strategy to bring unforeseen synergistic effects in a vast variety of functional materials. Here, we demonstrate a "microporous covalent organic framework (COF) net on mesoporous carbon nanotube (CNT) net" hybrid architecture as a new class of molecularly designed, hierarchical porous chemical trap for lithium polysulfides (Li2Sx) in Li-S batteries. As a proof of concept for the hybrid architecture, self-standing COF-net on CNT-net interlayers (called "NN interlayers") are fabricated through CNT-templated in situ COF synthesis and then inserted between sulfur cathodes and separators. Two COFs with different micropore sizes (COF-1 (0.7 nm) and COF-5 (2.7 nm)) are chosen as model systems. The effects of the pore size and (boron-mediated) chemical affinity of microporous COF nets on Li2Sx adsorption phenomena are theoretically investigated through density functional theory calculations. Benefiting from the chemical/structural uniqueness, the NN interlayers effectively capture Li2Sx without impairing their ion/electron conduction. Notably, the COF-1 NN interlayer, driven by the well-designed microporous structure, allows for the selective deposition/dissolution (i.e., facile solid liquid conversion) of electrically inert Li2Sx. As a consequence, the COF-1 NN interlayer provides a significant improvement in the electrochemical performance of Li-S cells (capacity retention after 300 cycles (at charge/discharge rate = 2.0 C/2.0 C) = 84% versus 15% for a control cell with no interlayer) that lies far beyond those accessible with conventional Li-S technologies | - |
dc.identifier.bibliographicCitation | NANO LETTERS, v.16, no.5, pp.3292 - 3300 | - |
dc.identifier.doi | 10.1021/acs.nanolett.6b00870 | - |
dc.identifier.issn | 1530-6984 | - |
dc.identifier.scopusid | 2-s2.0-84974782443 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/19440 | - |
dc.identifier.url | http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.6b00870 | - |
dc.identifier.wosid | 000375889700059 | - |
dc.language | 영어 | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | COF-Net on CNT-Net as a Molecularly Designed, Hierarchical Porous Chemical Trap for Polysulfides in Lithium-Sulfur Batteries | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter | - |
dc.relation.journalResearchArea | Chemistry; Science & Technology - Other Topics; Materials Science; Physics | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Carbon nanotubes | - |
dc.subject.keywordAuthor | covalent organic framework | - |
dc.subject.keywordAuthor | lithium polysulfides | - |
dc.subject.keywordAuthor | lithium-sulfur batteries | - |
dc.subject.keywordAuthor | micro/mesoporous hierarchical structure | - |
dc.subject.keywordAuthor | net on net | - |
dc.subject.keywordPlus | LI-S BATTERIES | - |
dc.subject.keywordPlus | ENERGY-STORAGE | - |
dc.subject.keywordPlus | ION BATTERIES | - |
dc.subject.keywordPlus | GRAPHENE | - |
dc.subject.keywordPlus | INTERLAYER | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | CATHODE | - |
dc.subject.keywordPlus | CHALLENGES | - |
dc.subject.keywordPlus | NANOSHEETS | - |
dc.subject.keywordPlus | PROSPECTS | - |
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