Preliminary study of dysprosium doped LiMn<inf>2</inf>O<inf>4</inf> spinel cathode materials

In current research work, we are presenting dysprosium (Dy) doped spinel cathode materials LiMn2-xDyxO4 (x=0.0, 0.01, 0.02, 0.03) and it's applications as cathode materials in lithium ion rechargeable batteries (LIRB) using a simple and sober sol-gel process. New materials were characterized using x-ray diffractometer and scanning electron microscope (SEM) which informed about the spinel phase purity and small grain size (∼1μm) compared to pristine LiMn2O4. The elementary electrochemical characterizations revealed that reversible and fast diffusion of Li+ ions have improved reversibility and initial specific capacity 124.18 and 124.68 mAhg-1 for Dy01 and Dy02 respectively which 103% of 120 mAhg-1 specific capacity LiMn2O4 at C/10 rate. The AC impedance spectra showed that the reduction in overall impedance via Dy doping in LiMn2O4. The galvenostatic charge-discharge study revealed the improved rate performance of doped LMO-Dy02 cathode.