Battery properties of lithium iron phosphate nano-particles synthesized by pulse combustion spray pyrolysis

Lithium iron phosphate/carbon (LFP/C) nano-perticles were successfully synthesized at 500 °C through the pulse jet spray pyrolysis with use of a citric acid aqueous solution. SEM observation and particle size analyzer showed that as-prepared LFP/C nano-particles had spherical and irregular shapes with an average size of 50 nm. XRD and ICP analysis revealed that as-prepared LFP/C nano-particles had an olivine phase with high crystallinity and a homogeneous chemical composition. The carbon content was 10 wt% in the LFP/C nano-perticles. A 2032 type coin cell was used to examine electrochemical properties of the LFP/C cathode. The discharge capacity of LFP/C cathode exhibited 170 at 1 C and 95 mAh/g at 30 C, respectively. The discharge capacity of the LFP/C cathode maintained 86 % of the initial discharge capacity after 500th cycle at 30 C and room temperature. The discharge capacity of the LFP/C cathode exhibited 100 mAh/g at 30 C and 50 °C and maintained 89 % of the initial discharge capacity after 100th cycle.