Identification of LiO bands in the infrared spectra of the insertion compound δ-LiV2O5

Article abstract of DOI:10.1002/pssa.2211170256

Vanadium pentoxide, V₂O₅, is known for its ability to form Li_xV₂O₅ compounds by inserting Li⁺ ions. This insertion process can be performed by chemical or electrochemical techniques at room temperature. The infrared spectra of samples of chemically prepared ⁶LiV₂O₅ and ⁷LiV₂O₅ compounds are shown. In comparison to V₂O₅, the spectra exhibit one main band near 360 cm^-1 which does not show any significant difference in both compounds. Spectra of Li_xV₂O₅ samples with x = 0.8 and 0.9 also show the Li-O bands but with lower intensity. Electrochemically prepared Li_xV₂O₅ compounds give the same infrared spectra as chemically prepared samples. From the isotopic shift of a band near 400 cm^-1 in the spectra it is concluded that in the structure of δ-LiV₂O₅ the Li⁺ ions occupy fourfold coordinated sites.