Preliminary Study of Lithium Nickel Cobalt Aluminum Oxide Synthesized by Flame Assisted Spray Pyrolysis

摘要

This paper concerns on characteristics of Lithium Nickel Cobalt Aluminum Oxide (NCA). NCA were synthesized by flame assisted spray pyrolysis (FASP), followed by heat treatment at 800°C for 6 hours. The preparation conditions such as chelating agent and precursor flow rate were varied to optimize NCA particles. Two types of chelating agents were citric acid (NCA-C) and nitric acid (NCA-N). Furthermore, the precursor flow rate were 40 mL/h, 70 mL/h and 100 mL/h. The highest product of NCA particles was produced at the precursor flow rate of 100 mL/h using both of chelating agents. The structure and morphology of NCA were characterized by XRD and SEM, respectively. From XRD spectra, NCA with hexagonal and layered structures were successfully synthesized and matched with JCPDS 87-1562. Based on SEM images, the irregular-shaped and micron-sized particles were formed. Moreover, electrochemical studies showed that NCA-N obtained the highest initial specific discharge of 67.72 mAh/g.