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AuthorKim, Hye Jin
AuthorChoi, Sunghun
AuthorLee, Seung Jong
AuthorSeo, Myung Won
AuthorLee, Jae Goo
AuthorDeniz, Erhan
AuthorLee, Yong Ju
AuthorKim, Eun Kyung
AuthorChoi, Jang Wook
Available date2021-06-03T09:23:16Z
Publication Date2016
Publication NameNano Letters
ResourceScopus
ISSN15306984
URIhttp://dx.doi.org/10.1021/acs.nanolett.5b03776
URIhttp://hdl.handle.net/10576/18529
AbstractDespite the recent considerable progress, the reversibility and cycle life of silicon anodes in lithium-ion batteries are yet to be improved further to meet the commercial standards. The current major industry, instead, adopts silicon monoxide (SiOx, x 1), as this phase can accommodate the volume change of embedded Si nanodomains via the silicon oxide matrix. However, the poor Coulombic efficiencies (CEs) in the early period of cycling limit the content of SiOx, usually below 10 wt % in a composite electrode with graphite. Here, we introduce a scalable but delicate prelithiation scheme based on electrical shorting with lithium metal foil. The accurate shorting time and voltage monitoring allow a fine-tuning on the degree of prelithiation without lithium plating, to a level that the CEs in the first three cycles reach 94.9%, 95.7%, and 97.2%. The excellent reversibility enables robust full-cell operations in pairing with an emerging nickel-rich layered cathode, Li[Ni0.8Co0.15Al0.05]O2, even at a commercial level of initial areal capacity of 2.4 mAh cm-2, leading to a full cell energy density 1.5-times as high as that of graphite-LiCoO2 counterpart in terms of the active material weight. 2015 American Chemical Society.
Languageen
PublisherAmerican Chemical Society
SubjectCoulombic efficiency
cycle life
full cell
prelithiation
silicon monoxide
TitleControlled Prelithiation of Silicon Monoxide for High Performance Lithium-Ion Rechargeable Full Cells
TypeArticle
Pagination282-288
Issue Number1
Volume Number16
dc.accessType Abstract Only


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