Radzi, Z. I. and Vengadaesvaran, B. and Rahim, N. A. and Raihan, S. R. S. (2024) Influence of calcination temperature on the structural properties of hydrothermally synthesized LiMn1.5Ni0.5O4 cathode material: a comparative study for calculating crystallite size and lattice strain. Applied Physics A-Materials Science & Processing, 130 (9). p. 647. ISSN 0947-8396, DOI https://doi.org/10.1007/s00339-024-07784-1.
Full text not available from this repository.Abstract
This paper has successfully employed a hydrothermal method to synthesize spinel LiMn1.5Ni0.5O4 (LMNO) cathode materials. Calcination at 600, 700, and 800 degrees C is performed to evaluate microstructure properties compared to as-prepared LMNO. The samples are investigated by XRD, SEM, TGA, FTIR. The crystallite sizes are smaller than the particle size of LMNO, revealing their polycrystalline nature. The TGA analysis supports the structural changes after calcined as revealed by XRD spectra. The FTIR spectrum indicates that the LMNO disorder-order transition occurs within the investigated temperature range. The peak broadening is attributable to the contribution of crystallite size and lattice strain, further analyzed according to Scherrer, Williamson-Hall, Size-Strain plot, and Halder-Wagner methods. Additionally, the results gained from different analysis methods are contrasted and discussed, which is the primary focus of this study. Generally, all analysis models indicate that the crystallite grows monotonously larger as temperature increases. The lowest lattice strain is observed in the as-prepared LMNO. However, calcining at 600 degrees C exhibits the highest developed lattice strain and gradually decreases as temperature increases further. This study also highlights the importance of convolution of size and strain contributions in determining the suitable method for calculating crystallite size and lattice strain.
| Item Type: | Article |
|---|---|
| Funders: | Kementerian Pendidikan Malaysia (FP034-2020 (FRGS/1/2020/TK0/UM/02/41)), Ministry of Higher Education Malaysia via Fundamental Research Grant Scheme, UM Power Energy Dedicated Advanced Centre (UMPEDAC) (RU003-2020) ; (RU002-2021), Higher Institution Centre of Excellence (HICoE) Program Research Grant, UMPEDAC - 2020 (MOHE HICOE - UMPEDAC), Ministry of Education Malaysia, Universiti Malaya |
| Uncontrolled Keywords: | X-ray diffraction; Halder-Wagner method; Shape factor; Cathode materials; Lattice strain |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TP Chemical technology |
| Divisions: | Deputy Vice Chancellor (Research & Innovation) Office > UM Power Energy Dedicated Advanced Centre |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 12 Feb 2025 08:24 |
| Last Modified: | 12 Feb 2025 08:24 |
| URI: | http://eprints.um.edu.my/id/eprint/47480 |
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