Synthesis and Performance of LiNi0.5Co0.4Al0.1O2 Composite Material for Lithium Ion Batteries

LiNi0.5Co0.4Al0.1O2 compositions were synthesized by high temperature solid-state method. The crystal structures and surface morphology of LiNi0.5Co0.4Al0.1O2 powders were characterized by X-ray diffractometry(XRD), fourier transform infrared spectrometer (FTIR) and scanning electron microscopy (SEM). The electrochemical properties of LiNi0.5Co0.4Al0.1O2 were examined by charge-discharge tests and cyclic voltammetry. The results showed that thematerial delivered the initial discharge capacity of 159.9 mAh center dot g(-1) with the voltage range 3 similar to 4.5 V and 0.2C rate, and it retained 142.6 mAh center dot g(-1) discharge capacity after 50 cycles.