Effect of Mg and Al Dual Doping on High Voltage Cycling of LiNi 0.4 Mn 0.4 Co 0.2 O 2 Lithium-ion Battery Cathode Material

Authors : Muharrem KUNDURACI

Pages : 577-582

View : 24 | Download : 11

Publication Date : 2018-08-15

Article Type : Research Paper

Abstract :Nano-sized LiNi 0.4 Mn 0.4 Co 0.2 O 2 lithium-ion battery cathode materials with and without dual Mg & Al doping were synthesized by Pechini method. The powdered materials were characterized using X-ray diffraction, scanning electron microscopy and electrochemical techniques. X-ray analyses showed that 003/104 peaks intensity ratio increased from 0.95 for undoped material to 1.27 for doped material, thereby suggesting that dual doping was beneficial in terms reducing Li/Ni cation mixing. Although dual doping caused some reduction in initial discharge capacity insert ignore into journalissuearticles values(140 vs. 128 mAh/g); and increase in charge transfer resistance relative to the undoped material, it noticeably helped increase capacity retention during battery testing at high voltage.
Keywords : Lithium ion batteries, Cathode, High voltage, Doping