In current research work, we are presenting dysprosium (Dy) doped spinel cathode materials LiMn2-xDyxO(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 (similar to 1 mu m) 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 chargedischarge study revealed the improved rate performance of doped LMO-Dy02 cathode (C) 2017 Elsevier Ltd. All rights reserved.