Structural, electrical and electrochemical studies of LiCoVO4 cathode material for lithium rechargeable batteries

The lithium cobalt vanadate (LiCoVO4) cathode material has been synthesized by sol–gel method. Rietveld refinement analysis of powder X-ray diffraction pattern confirmed that the prepared LiCoVO4 crystalline sample had a cubic structure and showed no evidence of secondary phase peaks. FESEM and TEM images of LiCoVO4 identified that the particle ranged from 1 μm to 200 nm. The XPS results showed that the oxidation states of cobalt and vanadium was + 3 and +5, respectively. The conductivity is found to be 1.16 × 10− 5 S cm− 1 at 60 °C. The variation of σDC with temperature indicates that electrical conduction in the material is a thermally activated process. Cyclic voltammetry (CV) studies performed on the synthesized LiCoVO4 cathode revealed the reversibility and structural stability during cycling.

LiCoVO4 cathode material has been prepared by sol-gel method. The structure and morphology of the compound has been studied by Rietveld refinement method using powder XRD data, FESEM and TEM analysis respectively. XPS studies confirmed that the oxidation states of cobalt and vanadate are + 3 and + 5. The conductivity is found as 1.16 × 10−5 S cm−1 at 60 °C.Figure optionsDownload as PowerPoint slideHighlights
► The compound was prepared by using sol–gel method.
► Rietveld refinement studies confirm the structure of the compound.
► Conductivity and Li+ intercalation properties of the compound were also studied.