PREPARATION IN AQUEOUS MEDIUM OF AMORPHOUS TiO2 COATINGS ON LNMO PARTICLES
Keywords:
recubrimiento superficial amorfo; LNMO; TiO2; baterías de ion litio.Abstract
Translator
LiNi0.5Mn1.5O4 (LNMO) is a promising high-voltage cathode material; however, its capacity is degraded by reactions with the electrolyte. Undesired reactions between the cathode and electrolyte in Li-ion batteries can be avoided by surface-coating the active cathode material. We used the citrate method in an aqueous medium to coat the commercial LNMO particles with amorphous TiO2. Three coatings were obtained to evaluate composition, morphology, structure thermal stability and electronic conductivity. Several characterization techniques were used: X-ray fluorescence, scanning electron microscopy, X-ray diffraction, Raman spectroscopy, and attenuated total reflection. The electronic conductivity was measured using the Kelvin Method. Among the prepared coatings, the best was the LNMO-T3, given that the amorphous TiO2 phase homogeneously covered the LNMO core particles with a morphology that resembled the physical core-shell type coating, a higher thermal stability, and electronic conductivity similar to that of the LNMO core material.
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Copyright (c) 2025 Ana Laura Díaz-Perera, Carlos Ricardo Milián-Pila, Manuel Ávila-Santos, Yodalgis Mosqueda-Laffita, Eduardo Lázaro Pérez-Cappe
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