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

LiV3O8 has been coated by various amounts of Co0.58Ni0.42 oxide nanoneedles using a chemical co-precipitation method. The influences of the coating on the structure, morphology, and electrochemical properties of LiV3O8 have been characterized by X-ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM), and electrochemical measurements. Co0.58Ni0.42 oxide coated LiV3O8 materials exhibit distinct surface morphology. The coating has been found to improve the electrochemical performance of LiV3O8 significantly. Especially, 5.0 wt.% Co0.58Ni0.42 oxide nanoneedles coated LiV3O8 shows much better electrochemical performance than uncoated LiV3O8. It has been proved that Co0.58Ni0.42 oxide coating suppresses phase transitions and decreases the charge-transfer impedance of LiV3O8 effectively.