Nanostructrured LiNi1/3Co1/3Mn1/3O 2 cathode material synthesized by one-step ultrasonic spray pyrolysis method

Abstract

Nanostructured LiNi1/3Co1/3Mn1/3O 2 powders were successfully synthesized via a new innovative one-step ultrasonic spray pyrolysis process. The prepared powders were comprised of nanosized crystallites and formed a spherical shape. Well-crystallized structure was obtained after calcination at 800 ¢XC. The prepared LiNi 1/3Co1/3Mn1/3O2 powders exhibited a high discharge capacity of 184 mAh/g. At 20 C high discharge rate, a capacity retention as high as 55% was obtained comparing to the 0.1C discharge rate capacity within the voltage range of 2.5-4.5 V. The capacity retention was 78% after 100 cycles test at 1C charging and 3C discharging rate at 55 ¢XC. In-situ XRD showed the structural stability of LiNi1/3Co 1/3Mn1/3O2 powders was quite good at overcharged state.