Electrochemical Performance of LiV₃O8−xClxCathode Materials Synthesized by a Low‐Temperature Solid State Method

A series of cathode materials for lithium ion batteries with the formula LiV 3 O 8− x Cl x ( x =0.00, 0.05, 0.10 and 0.15) were synthesized by a low‐temperature solid‐state method. The effects of Cl − substitution on the structure, morphology and electrochemical properties of the cathode materials were investigated through X‐ray diffraction (XRD), scanning electron microscopy (SEM), charge‐discharge test, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) experiments. The results show that an enhanced cycle performance is on the Cl − doped cathode materials. LiV 3 O 7.90 Cl 0.10 shows the best electrochemical performances with the discharge capacity remaining 198.6 mAh/g after 100 cycles, which results from a greater reversibility during cycling and decrease of particle‐to‐particle impedance.