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Lee, Sang-Young
Energy Soft-Materials Lab.
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dc.citation.number 9 -
dc.citation.startPage 903658 -
dc.citation.volume 10 - Kim, Ju-Myung - Park, Jae-Ho - Jo, Eunmi - Kim, Hyung-Seok - Kim, Seung-Hyeok - Chang, Wonyoung - Chung, Kyung Yoon - Lee, Sang-Young - 2023-12-21T17:51:01Z - 2023-12-21T17:51:01Z - 2020-02-10 - 2020-03 -
dc.description.abstract Despite their exceptionally high capacity, overlithiated layered oxides (OLO) have not yet been practically used in lithium-ion battery cathodes due to necessary toxic/complex chemical activation processes and unsatisfactory electrochemical reliability. Here, a new class of ecofriendly chemical activation strategy based on amphiphilic deoxyribose nucleic acid (DNA)-wrapped multiwalled carbon nanotubes (MWCNT) is demonstrated. Hydrophobic aromatic bases of DNA have a good affinity for MWCNT via noncovalent pi-pi stacking interactions, resulting in core (MWCNT)-shell (DNA) hybrids (i.e., DNA@MWCNT) featuring the predominant presence of hydrophilic phosphate groups (coupled with Na+) in their outmost layers. Such spatially rearranged Na+-phosphate complexes of the DNA@MWCNT efficiently extract Li+ from monoclinic Li2MnO3 of the OLO through cation exchange reaction of Na+-Li+, thereby forming Li4Mn5O12-type spinel nanolayers on the OLO surface. The newly formed spinel nanolayers play a crucial role in improving the structural stability of the OLO and suppressing interfacial side reactions with liquid electrolytes, eventually providing significant improvements in the charge/discharge kinetics, cyclability, and thermal stability. This beneficial effect of the DNA@MWCNT-mediated chemical activation is comprehensively elucidated by an in-depth structural/electrochemical characterization. -
dc.identifier.bibliographicCitation ADVANCED ENERGY MATERIALS, v.10, no.9, pp.903658 -
dc.identifier.doi 10.1002/aenm.201903658 -
dc.identifier.issn 1614-6832 -
dc.identifier.scopusid 2-s2.0-85078854274 -
dc.identifier.uri -
dc.identifier.url -
dc.identifier.wosid 000509987500001 -
dc.language 영어 -
dc.publisher WILEY-V C H VERLAG GMBH -
dc.title Ecofriendly Chemical Activation of Overlithiated Layered Oxides by DNA-Wrapped Carbon Nanotubes -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter -
dc.relation.journalResearchArea Chemistry; Energy & Fuels; Materials Science; Physics -
dc.type.docType Article; Early Access -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor carbon nanotubes -
dc.subject.keywordAuthor chemical activation -
dc.subject.keywordAuthor deoxyribonucleic acid -
dc.subject.keywordAuthor lithium-ion battery cathodes -
dc.subject.keywordAuthor overlithiated layered oxides -
dc.subject.keywordPlus X-RAY-DIFFRACTION -
dc.subject.keywordPlus CATHODE MATERIALS -
dc.subject.keywordPlus STRUCTURAL TRANSFORMATION -
dc.subject.keywordPlus ELECTRON-MICROSCOPY -
dc.subject.keywordPlus ENERGY-DENSITY -
dc.subject.keywordPlus VOLTAGE-FADE -
dc.subject.keywordPlus LITHIUM -
dc.subject.keywordPlus PERFORMANCE -
dc.subject.keywordPlus ABSORPTION -


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