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Enhancing the cycle stability of Li-O-2 batteries via functionalized carbon nanotube-based electrodes

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dc.contributor.authorCho, Young Shik-
dc.contributor.authorKim, Hyunjin-
dc.contributor.authorByeon, Minhoo-
dc.contributor.authorKim, Dong Young-
dc.contributor.authorPark, Hyeokjun-
dc.contributor.authorJung, Yeonsu-
dc.contributor.authorBae, Youngjun-
dc.contributor.authorKim, Mokwon-
dc.contributor.authorLee, DongJoon-
dc.contributor.authorPark, JungOck-
dc.contributor.authorKang, Kisuk-
dc.contributor.authorIm, Dongmin-
dc.contributor.authorPark, Chong Rae-
dc.date.accessioned2021-01-31T05:39:24Z-
dc.date.available2021-01-31T05:39:24Z-
dc.date.issued2020-02-
dc.identifier.citationJournal of Materials Chemistry A, Vol.8 No.8, pp.4263-4273-
dc.identifier.issn2050-7488-
dc.identifier.other100831-
dc.identifier.urihttps://hdl.handle.net/10371/171800-
dc.description.abstractAchieving the high theoretical energy density (similar to 3500 W h kg(-1)) of Li-O-2 batteries involves maximizing the electrochemically active surface area (EASA) of the electrodes. Carbon nanotubes (CNTs) have been widely adopted for Li-O-2 electrodes but their EASA is limited by their electrolyte-phobic surface nature and the strong van der Waals interaction between CNTs. To increase the affinity between CNT-based electrodes and the electrolyte without decreasing CNT chemical stability, CNT buckypapers are functionalized with 3,5-bis(trifluoromethyl)phenylmaleimide. The solubility parameters of the electrolyte and CNTs are considered so that the maleimide groups increase the affinity between the electrode and electrolyte and the 3,5-bis(trifluoromethyl)phenyl groups protect the maleimide groups from decomposition. The functionalized CNT cathode exhibits a 58% greater discharge capacity and a 50% increased cyclability compared to the pristine CNT cathode when a 1 : 2.5 weight ratio of CNT to electrolyte was used due to an increased EASA and steric hindrance effect. Finally, a 3D folded Li-O-2 cell is fabricated using the functionalized CNT-based cathode and demonstrated 30 cycles at 100 W h kg(cell)(-1) cutoff. These results clearly show that high energy density and long cycling performance of Li-O-2 batteries can be achieved even with a much reduced amount of electrolyte by increasing the affinity between CNT-based electrodes and the electrolyte.-
dc.titleEnhancing the cycle stability of Li-O-2 batteries via functionalized carbon nanotube-based electrodes-
dc.typeArticle-
dc.contributor.AlternativeAuthor강기석-
dc.contributor.AlternativeAuthor박종래-
dc.identifier.doi10.1039/c9ta12116a-
dc.citation.journaltitleJournal of Materials Chemistry A-
dc.identifier.scopusid2-s2.0-85080904756-
dc.citation.endpage4273-
dc.citation.number8-
dc.citation.startpage4263-
dc.citation.volume8-
dc.identifier.urlhttps://pubs.rsc.org/en/content/articlelanding/2020/TA/C9TA12116A#!divAbstract-
dc.identifier.rimsid100831-
dc.identifier.sci000519704200039-
dc.description.isOpenAccessN-
dc.contributor.affiliatedAuthorKang, Kisuk-
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
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