X-ray diffraction and Raman scattering studies of Li+/e−-extracted inverse spinel LiNiVO4

Abstract Inverse spinel LiNiVO 4 was prepared by a soft-chemical technique. The structural properties of the as-prepared and electrochemically Li-extracted LiNiVO 4 were investigated by X-ray diffraction and Raman scattering. X-ray diffraction showed that Li-extraction had little effect on the material's crystal structure. Raman scattering showed softening of the V–O bonds and severer distorted [VO 4 ] tetrahedron with Li-extraction. Li-extraction resulted in a decreased electronic conductivity to the material. The relative intensity of the A 1g and F 2g bands was suggested to be associated with the Li + content in Li x NiVO 4 .