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AuthorJames Abraham, Jeffin
AuthorNisar, Umair
AuthorMonawwar, Haya
AuthorAbdul Quddus, Aisha
AuthorShakoor, Abdul
AuthorSaleh, Mohamed
AuthorKahraman, Ramazan
AuthorAl-Qaradawi, Siham
AuthorAljaber, Amina
Available date2020-10-22T06:59:10Z
Publication Date2020
Publication NameQatar University Annual Research Forum & Exhibition 2020
CitationJames A.J., Nisar U., Monawwar H., Abdul Quddus A., Shakoor R.A., Saleh M., Kahraman R., AlQaradawi S., Aljaber A., "SiO2 Coated Li-rich Layered Oxides-Li1.2Ni0.13Mn0.54Co0.13O2 for efficient energy storage applications", Qatar University Annual Research Forum and Exhibition (QUARFE 2020), Doha, 2020, https://doi.org/10.29117/quarfe.2020.0005
URIhttps://doi.org/10.29117/quarfe.2020.0005
URIhttp://hdl.handle.net/10576/16540
AbstractLithium ion batteries (LIBs) are attractive for energy storage application. In this regard, lithium rich layered oxides (LLOs), are considered viable cathodes due to their tempting properties such as lower production cost, faster manufacturing process, excellent reversible capacity, and better electrochemical performance at high voltages. Despite these properties, LLOs lack in cyclic stability and inferior capacity retention. This study proposes a surface modification technique to overcome the above-mentioned limitations in which a layer of silica (SiO2) has been coated on the particles of Li1.2Ni0.13Mn0.54Co0.13O2.TheLi1.2Ni0.13Mn0.54Co0.13O2 wassynthesized by a sol-gel process and then coated with SiO2 (SiO2=1.0 wt. %, 1.5 wt. %, and 2.0 wt. %). The coatings were undertaken through a dry ball milling technique. Different characterization test such as X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Transmission electron microscopy (TEM), elemental mapping, and X-ray photoelectron spectroscopy (XPS), were utilized to prove phase pure material formation and identify the SiO2 layer on the surface of Li1.2Ni0.13Mn0.54Co0.13O2. The electrochemical measurements, confirm the improvement in capacity retention and cyclability of SiO2 coated Li1.2Ni0.13Mn0.54Co0.13O2 samples with reference to the uncoated samples. This improvement can be ascribed to the protective and barrier effect of the coated layer on the LLOs particles avoiding any unwanted side reactions when the cathode is exposed to the electrolyte. A small trade-off between electrochemical performances and the coating thickness confirms the best efficiency of 1 wt.% SiO2 coated Li1.2Ni0.13Mn0.54Co0.13O2 when compared to other coated samples.
Languageen
PublisherQatar University Press
SubjectLayered oxides
sol-gel
coating
ball milling
charge/discharge capacity.
TitleSiO2 Coated Li-rich Layered Oxides-Li1.2Ni0.13Mn0.54Co0.13O2 for efficient energy storage applications
TypePoster
dc.accessType Open Access


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