Synthesis, structural and electrochemical properties of LiNi0.79Co0.1Mn0.1Cr0.01O2 via fast co-precipitation

▶ TEM and EDAX exhibit that Cr is successfully incorporating into LiNi0.8Co0.1Mn0.1O2 material. ▶ X-ray diffraction (XRD) and Rietveld refinement show that the cation mixing is reduced by Cr substitution. ▶ Cyclic voltammerty (CV) indicate that the Cr substitution could decrease the Jahn-Teller distortion, and improve the reversibility of Li+ ions during intercalating/deintercalating in LiNi0.79Co0.1Mn0.1Cr0.01O2 compound. ▶ EIS reveals that Cr substitution has an effect on restraining the charge transfer impedance of cathode ▶ Electrochemical tests show that the Cr substitution sample exhibits improved discharge capacity, initial coulombic efficiency, rate ability and cycling property, compared to that of pristine sample.