Improving Electrochemical Performance of Fe doped Li1.2Ni0.13Co0.13Mn0.54O2 Cathode Material for Lithium-Ion Battery

Li1.2Ni0.13Co0.13Mn0.54O2 cathode material was prepared via a high temperature solid-state method. Using X-ray diffraction, scanning election microscopy, electron diffraction spectroscopy, infrared absorption spectrum, electrochemical impedance spectroscopy (EIS), and galvanostatic chargedischarge measurements. The Li1.2Ni0.13Co0.13Mn0.54O2 electrode appears a high reversible discharge capacity of 300 mAhg-1 at 0.1C-rate with a high capacity retention rate of 90.9% after 50 cycles within a potential range of 2.0-4.8 V at room temperature. The Fe-doped cathode materials indicate a better improvement in cycling performance and rate character, which EIS datas indicated a number of variation in surface film resistance (Rs) and lithium intercalation/de-intercalation resistance (Rct) as a function of applied voltage. The datas indicate well-crystallized surface of the particles and stability of layered structure of Li1.2Ni0.13Co0.13Mn0.54O2 electrode with amorphous surface area and spinel nanodonmains distribution for Li1.2Ni0.13Co0.13Mn0.54O2 electrode at cycling, which explain the excellent electrochemical performance of Fe doped Li1.2Ni0.13Co0.13Mn0.54O2 cathode material.