Solid-state 7_Li NMR studies of inverse spinel LiNi_xCo_1-xVO_4 cathode materials

摘要

Solid-state 7_Li NMR spectroscopy revealed different Ni/Co distributions in an iverse spinel structure of LiNi_xCo_1-xVO_4 cathode materials prepared by either a high-temperature solid-state reaction method (abbreviate as the HT method) or a low-temperature solution co-precipitation method (abbreviated as the LT method). Solid-state 7_Li NMR measurements confirmed that the lithium nuclear spin was dominate by a chemical shift anisotropy (CSA) interaction compounded with a small second-order quadrupolar interaction.