LAUSR

We examined the effects of synthesis temperature on the structural and electrochemical properties of layered Li1.06Ni0.5Co0.2Mn0.3O2 cathode materials synthesized by co-precipitation. Scanning electron microscopy showed that a higher synthesis temperature resulted in a bigger primary particle size. Rietveld refinement revealed that the content of nickel ions at the 3b site decreased from 0.041 to 0.038 and subsequently increased to 0.064 as synthesis temperature rose from 800 to 980 °C. The incircle/circumcircle radii of the tetrahedral sites providing space for lithium-ion migration increased gradually with synthesis temperature. The Li1.06Ni0.5Co0.2Mn0.3O2 sample synthesized at 920 °C displayed the optimal electrochemical performance, delivering a discharge capacity of 181.6 mAhg −1