Dopant depends on morphological and electrochemical characteristics of LiMn 2-XMo XO4 cathode nanoparticles

For the first time, solid solutions of LiMn2-X Mo (X) O-4 nanoparticles were synthesized by combustion method at 700 A degrees C in air. The synthesized LiMn2-X Mo (X) O-4 (X = 0.0-0.2) nanoparticles were characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy (FT-IR), Field emission-scanning electron microscopy, and Particle size analysis. The unit-cell constant is increasing from 8.237 to 8.293 with the increase of Mo, the presence of Mo at X a parts per thousand currency signaEuro parts per thousand 0.05 in LiMn2-X Mo (X) O-4 nanoparticles retained the spinel structure (Fd-3m), whereas on increasing the Mo (X a parts per thousand yenaEuro parts per thousand 0.05 %), the ordering of Li+ ions in both octahedral and tetrahedral cationic position leads to the lowering of symmetry (P4(1)32). On increasing the Mo content, prominent peak splitting and broadening are observed at 600-500 and 830 cm(-1) for Li-Mn-O and Mo-O respectively in the FT-IR spectra. The TG/DTA spectrum reveals that the convenient formation of Li mangano-molybdate is at 700 A degrees C. The voltammograms of all the samples show two redox peaks centered around 4 V except for the sample with higher Mo doping (X = 0.2). The sample with X = 0.03 shows higher redox peak current values. A marginal increase of 146 Omega R (ct) value was found for the LiMn1.97Mo0.03O4 nanomaterial after 10th cycle which is rather high for the rest of the materials. A discharge capacity retention of 88 % at 50th cycle is observed for X = 0.03 sample, while the other samples exhibit drastically reduced capacity. The LiMn1.97Mo0.03O4 nanoparticle can able to deliver higher and constant discharge capacity, and it may be a good alternative for the existing cathode materials.