• Synthesis of Li$x$(Ni0.80Co0.15Al0.05)O2 cathodes with deficient and excess lithium using an ultrasonic sound-assisted co-precipitation method for Li-ion batteries

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      https://www.ias.ac.in/article/fulltext/boms/042/05/0205

    • Keywords

       

      Co-precipitation; ultrasound; cathode material; Li-ion battery; sonochemistry.

    • Abstract

       

      The possible improvements in structural stability and capacity of nickel–cobalt–aluminium cathode mate-rial were investigated by synthesizing this compound with various lithium amounts (Li$x$(Ni0.80Co0.15Al0.05)O2 where $x$ = 0.90, 0.95, 1.00 and 1.05). An ultrasound-assisted co-precipitation method was performed to produce spherical, nanosized powders with a narrow size distribution which satisfies a homogeneous and dense film during calendaring. Lay-ered Li$x$(Ni0.80Co0.15Al0.05)O2 ($x$ = 0.90, 0.95, 1.00 and 1.05) cathode active materials were successfully synthesized with this method and chemical compositions of the powders synthesized were determined by inductively coupled plasma-mass spectroscopy. Structural characterization was carried out via X-ray diffraction and scanning electron microscopy techniques. The electrochemical properties of the cathode materials were investigated by electrochemical impedance spec-troscopy, galvanostatic charge/discharge and cyclic voltammetry methods. Among the cathode compositions in the currentstudy, Li1.05(Ni0.80Co0.15Al0.05)O2 exhibited the highest capacity, 138 mAh g⁻¹ with 95% capacity retention upon 22 cycles.

    • Author Affiliations

       

      CANSU SAVAş UYGUR1 2 B PIşKIN2 3 M K AYDINOL1 2

      1. ENDAM, Center for Energy Storage Materials and Devices, Middle East Technical University, Ankara 06800, Turkey
      2. Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara 06800, Turkey
      3. Department of Metallurgical and Materials Engineering, Mu˘gla Sıtkı Koçman University, Mu˘gla 48000, Turkey
    • Dates

       
  • Bulletin of Materials Science | News

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