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AuthorJames Abraham, Jeffin
AuthorNisar, Umair
AuthorMonawwar, Haya
AuthorAbdul Quddus, Aisha
AuthorShakoor, R. A.
AuthorSaleh, Mohamed I.
AuthorKahraman, Ramazan
AuthorAl-Qaradawi, Siham
AuthorAljaber, Amina S.
Available date2022-10-05T07:23:05Z
Publication Date2020
Publication NameJournal of Materials Science: Materials in Electronics
ResourceScopus
URIhttp://dx.doi.org/10.1007/s10854-020-04481-6
URIhttp://hdl.handle.net/10576/34832
AbstractLithium-rich layered oxides (LLOs) such as Li1.2Ni0.13Mn0.54Co0.13O2 are suitable cathode materials for future lithium-ion batteries (LIBs). Despite some salient advantages, like low cost, ease of fabrication, high capacity, and higher operating voltage, these materials suffer from low cyclic stability and poor capacity retention. Several different techniques have been proposed to address the limitations associated with LLOs. Herein, we report the surface modification of Li1.2Ni0.13Mn0.54Co0.13O2 by utilizing cheap and readily available silica (SiO2) to improve its electrochemical performance. Towards this direction, Li1.2Ni0.13Mn0.54Co0.13O2 was synthesized utilizing a sol-gel process and coated with SiO2 (SiO2 = 1.0 wt%, 1.5 wt%, and 2.0 wt%) employing dry ball milling technique. XRD, SEM, TEM, elemental mapping and XPS characterization techniques confirm the formation of phase pure materials and presence of SiO2 coating layer on the surface of Li1.2Ni0.13Mn0.54Co0.13O2 particles. The electrochemical measurements indicate that the SiO2-coated Li1.2Ni0.13Mn0.54Co0.13O2 materials show improved electrochemical performance in terms of capacity retention and cyclability when compared to the uncoated material. This improvement in electrochemical performance can be related to the prevention of electrolyte decomposition when in direct contact with the surface of charged Li1.2Ni0.13Mn0.54Co0.13O2 cathode material. The SiO2 coating thus prevents the unwanted side reactions between cathode material and the electrolyte. 1.0 wt% SiO2-coated Li1.2Ni0.13Mn0.54Co0.13O2shows the best electrochemical performance in terms of rate capability and capacity retention.
SponsorThis publication was made possible by NPRP Grant # NPRP11S-1225-170128 from Qatar National Research Fund (a member of the Qatar Foundation). Statements made herein are solely the responsibility of the authors. FE-SEM analysis was accomplished at the Central Laboratory Unit (CLU), Qatar University, Doha, Qatar, TEM analysis was conducted at the Core Labs., QEERI, HBKU, Qatar and XPS analysis was accomplished at the Gas Processing Center (GPC), Qatar University, Doha, Qatar.
Languageen
PublisherSpringer
SubjectLithium-rich layered oxides (LLOs)
lithium-ion batteries (LIBs)
SiO2-coated Li-rich layered oxides
TitleImproved electrochemical performance of SiO2-coated Li-rich layered oxides-Li1.2Ni0.13Mn0.54Co0.13O2
TypeArticle
Pagination19475-19486
Issue Number21
Volume Number31
dc.accessType Open Access


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