Effect of Co0.58Ni0.42 oxide nanoneedles coating on the electrochemical properties of LiV3O8 cathode

Abstract LiV 3 O 8 has been coated by various amounts of Co 0.58 Ni 0.42 oxide nanoneedles using a chemical co-precipitation method. The influences of the coating on the structure, morphology, and electrochemical properties of LiV 3 O 8 have been characterized by X-ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM), and electrochemical measurements. Co 0.58 Ni 0.42 oxide coated LiV 3 O 8 materials exhibit distinct surface morphology. The coating has been found to improve the electrochemical performance of LiV 3 O 8 significantly. Especially, 5.0 wt.% Co 0.58 Ni 0.42 oxide nanoneedles coated LiV 3 O 8 shows much better electrochemical performance than uncoated LiV 3 O 8 . It has been proved that Co 0.58 Ni 0.42 oxide coating suppresses phase transitions and decreases the charge-transfer impedance of LiV 3 O 8 effectively.