LiMn2O4 particles prepared by spray pyrolysis from spray solution with citric acid and ethylene glycol

摘要

Spinel LiMn2O4 particles with fine sizes and regular morphologies were successfully synthesized by ultrasonic spray pyrolysis at the severe preparation conditions from a spray solution with citric acid and ethylene glycol. The as-prepared particles with spherical shapes, porous structures and micron sizes turned into LiMn2O4 particles with submicron size and narrow size distribution at the post-treatment temperature of 800 degrees C. The discharge capacities of the particles prepared from the spray solution with citric acid and ethylene glycol changed from 90 to 127 mAh/g when the post-treatment temperature was changed from 700 to 1 1000 degrees C. The LiMn2O4 particles had maximum discharge capacities at the post-treatment temperature of 800 degrees C. The discharge capacity of the LiMn2O4 particles dropped from 127 to 108 mAh/g by the 30th cycle.