Preliminary study of dysprosium doped LiMn2O4 spinel cathode materials

Abstract In current research work, we are presenting dysprosium (Dy) doped spinel cathode materials LiMn 2-x Dy x O 4 (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 LiMn 2 O 4 . 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 LiMn 2 O 4 at C/10 rate. The AC impedance spectra showed that the reduction in overall impedance via Dy doping in LiMn 2 O 4 . The galvenostatic charge-discharge study revealed the improved rate performance of doped LMO-Dy02 cathode.