Nano-crystattine LiCoVO4 and LiNiVO4 were prepared using Li2CO3, Co(NO3)(2)center dot 6H(2)O or Ni(NO3)(2)center dot 6H(2)O and NH4VO3 as raw materials in deionized water and tartaric acid as a complexing reagent, and followed by 450-600 degrees C calcination for 12 h. TGA showed weight loss due to the combustion of the precursor at 190-500 degrees C. The products were characterized by XRD and found to be LiCoVO4 and LiNiVO4 with an inverse spinel structure. FTIR and Raman analyses showed the V-O stretching vibration of VO4 tetrahedrons and Li-O bending vibration of LiO6 octahedrons. TEM showed nano-powders of LiCoVO4 and LiNiVO4 which have high specific areas for improving lithium ion migration in lithium ion batteries.

Keywords: lithium ion batteries; LiNiVO4; LiCoVO4