Abstract
The nano-powders of Li (Li0.21Mn0.54Ni0.125Co0.125-x) FexO2 (x = 0, 0.025, 0.05, 0.075, and 0.1) were synthesized using a sol-gel procedure and characterized using various techniques. According to the X-ray diffraction (XRD) analysis, the patterns of both pure and Fe-doped Li-rich cathodes were in agreement with the standard reference XRD pattern of lithium nickel cobalt oxide known as α-NaFeO2-type structures. The field-emission scanning electron microscopy (FESEM) results revealed that the morphology of all the prepared samples, with or without Fe impurities, was uniform and similar. Furthermore, the particle size of nano-powders was found to be less than 100 nm and it increased with the addition of Fe impurities. The transmission electron microscopy (TEM) results showed that the particles in both pure and Fe-doped samples have an almost hexagonal shape. The addition of iron resulted in an increase in particle size. Based on the electrochemical measurements, inclusion of iron to the cathode led to the facilitated charge transfer to the cathode. The sample containing 0.075 Fe exhibited superior cyclic performance, achieving a charge capacity of 381 mAhg−1 and a discharge capacity of 353 mAhg−1 were delivered by this electrode. This sample also demonstrated the highest Coulombic efficiency among all samples, which was about 93%.
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We the undersigned declare that this manuscript is original, has not been published before and is not currently being considered for publication elsewhere. We confirm that the manuscript has been read and approved by all named authors (Abdullah Jalil Khazaal, Ali Ben Ahmed, Boshra Ghanbari Shohany) and that there are no other persons who satisfied the criteria for authorship but are not listed. We further confirm that the order of authors listed in the manuscript has been approved by all of us. We understand that the corresponding author “Ali Ben Ahmed” is the sole contact for the editorial process. He is responsible for communicating with the other authors about progress, submissions of revisions and final approval of proofs. All authors contributed equally to this paper: 1- Abdullah Jalil Khazaal: Methodology, Data curation, conceptualization, first draft writing. 2- Ali Ben Ahmed: Investigation, Data curation, Supervising, Writing and Reviewing, and editing. 3- Boshra Ghanbari Shohany: Spectroscopies measurement, Validation, formal analysis, Writing and Reviewing.
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Jalil Khazaal, A., Ben Ahmed, A. & Ghanbari Shohany, B. Preparation and electrochemical investigation of Fe-doped lithium-rich layered Li(Li0.21Mn0.54Ni0.125Co0.125)O2 cathode material. Ionics 30, 1897–1911 (2024). https://doi.org/10.1007/s11581-024-05432-5
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DOI: https://doi.org/10.1007/s11581-024-05432-5