عرض بسيط للتسجيلة

المؤلفJames Abraham, Jeffin
المؤلفNisar, Umair
المؤلفMonawwar, Haya
المؤلفAbdul Quddus, Aisha
المؤلفShakoor, Abdul
المؤلفSaleh, Mohamed
المؤلفKahraman, Ramazan
المؤلفAl-Qaradawi, Siham
المؤلفAljaber, Amina
تاريخ الإتاحة2020-10-22T06:59:10Z
تاريخ النشر2020
اسم المنشورQatar University Annual Research Forum & Exhibition 2020
الاقتباسJames 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
معرّف المصادر الموحدhttps://doi.org/10.29117/quarfe.2020.0005
معرّف المصادر الموحدhttp://hdl.handle.net/10576/16540
الملخصLithium 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.
اللغةen
الناشرQatar University Press
الموضوعLayered oxides
sol-gel
coating
ball milling
charge/discharge capacity.
العنوانSiO2 Coated Li-rich Layered Oxides-Li1.2Ni0.13Mn0.54Co0.13O2 for efficient energy storage applications
النوعPoster
dc.accessType Open Access


الملفات في هذه التسجيلة

Thumbnail

هذه التسجيلة تظهر في المجموعات التالية

عرض بسيط للتسجيلة