Mass production and battery properties of LiNi_(0.5)Mn_(1.5)O_4 powders prepared by internal combustion type spray pyrolysis

摘要

Internal combustion type spray pyrolysis apparatus was used to prepare cathode materials for lithium ion batteries. Spherical LiNi_(0.5)Mn_(1.5)O_4 precursor powders with an average size of about 2 μm were successfully produced by this technique. After calcination at 800°C, LiNi_(0.5)Mn_(1.5)O_4 precursor powders crystallized to a spinel structure. The spherical morphology changed to an irregular morphology at temperatures higher than 900°C. The discharge capacity of the LiNi_(0.5)Mn_(1.5)O_4 cathode was 130 mAh/g at 1C. After 300 cycles at 1C, 90% of the initial discharge capacity was maintained, and after 100 cycles at 6C, 70% of the discharge capacity at 1C was maintained.