Open AccessModeling and synthesis of carbon-coated LiMnPO4 cathode material: Experimental investigation and optimization using response surface methodology
Author(s) -
Redouan El Khalfaouy,
Khadija Khallouk,
Alae Elabed,
Abdellah Addaou,
Ali Laajeb,
Ahmed Lahsini
Publication year - 2022
Publication title -
journal of electrochemical science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.236
H-Index - 6
ISSN - 1847-9286
DOI - 10.5599/jese.1191
Subject(s) - materials science , lithium (medication) , polyethylene glycol , cathode , response surface methodology , carbon fibers , ion , chemical engineering , peg ratio , solvent , particle size , analytical chemistry (journal) , composite material , chromatography , organic chemistry , chemistry , composite number , medicine , finance , engineering , economics , endocrinology
Nanostructured LiMnPO4 cathode materials for lithium-ion batteries (LIBs) have been successfully prepared by a modified solvothermal method under controlled conditions. Polyethylene glycol (PEG-10000) was used as a solvent to optimize the particle size/morphology and as a carbon conductive matrix. In order to investigate the effect of synthesis parameters such as concentration of PEG-10000, reaction time and reaction temperature on the LiMnPO4 phase purity, Response surface methodology was carried out to find variations in purity results across the composition. The purity of all materials was checked using HighScore software by comparing the matched lines score to ones of reference data. As a result, it has been found that the pure phospho-olivine material LiMnPO4 can be synthesized using the following optimum conditions: PEG concentration = 0.1 mol l-1, reaction time = 180 min, and reaction temperature = 250 °C. The as-prepared LiMnPO4 under optimum conditions delivered an initial discharge capacity of 128.8 mAh g-1 at 0.05 C‑rate. The present work provides insights and suggestions for optimizing synthesis conditions of this material, which has been considered the next promising cathode candidate for high-energy lithium-ion batteries.