Synthesis of rare Earth element doped LiMn1.5Ni0.5O4 as a lithium-ion battery cathode material using sonochemical method (original) (raw)

2021, PROCEEDINGS OF INTERNATIONAL CONFERENCE ON NUCLEAR SCIENCE, TECHNOLOGY, AND APPLICATION 2020 (ICONSTA 2020)

Rare earth element (REE) have been used to improve the performance of LiMn 1.5 Ni 0.5 O 4 (LMNO) cathode material. Sonochemical reaction followed by annealing has been used to synthesize REE doped LMNO. Yttrium (Y) was used as the REE with the formula of LiMn 1.5-x Ni 0.5 Y x O 4 using Yttrium (III) nitrate hexahydrate as the precursor. The samples were characterized using thermal analysis and X-ray diffraction (XRD) measurements. The thermal analysis measurement of as sonicated samples show the decomposition of precursor closed to 400℃, and disappeared when the samples were annealed. The XRD profiles show very good fit between the observed and data base. The obtained samples were identified as single phase spinel with a face centered cubic (FCC) structure. The XRD data are also indicating that Y doping does not affect the formation of the cubic spinel structure of LiMn 1.5-x Ni 0.5 Y x O 4. Re-annealing at 800 ℃ causes an increase in sample crystallinity but also impurities. The electrochemical examination shows that the battery performance seems to be better with the Y doping. In other word, REE doping increased the electrochemical, i.e. capacity and nominal voltage, of LiMn 1.5 Ni 0.5 O 4 cathode materials.

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