Enhanced electrochemical and safe performances of LiNi1/3Co1/3Mn1/3O2 by nano-CeO2 coating via a novel hydrolysis precipitate reaction route

The homogeneous nano-CeO2 coated on the LiNi1/3Co1/3Mn1/3O2 powder like substrate was prepared via a novel hydrolytic precipitation reaction followed by the thoroughly baking at 450 °C. The chemical composite of nano-CeO2 coating layer was spectroscopically examined by X-ray diffraction, field-emission scanning electron microscopy and X-ray photoelectron spectrometer. The electrochemical characterization of the resulting materials proclaim that nano-CeO2 coating can drastically improve lithium storage performances. The optimum coating amount of CeO2 is as high as 2 wt%, which rendered a discharge capacity of 148.9 mAh g−1 with 91.6% capacity retention ensuing as many as 100 cycles. In particular, the exothermic peak is vastly increased from 256.4 to 338.2 °C. The value is superior to its counterparts, LiNi1/3Co1/3Mn1/3O2. It paves a new avenue for developing high safety lithium batteries.