Hydride Intercalation of Lithium into the Spinel MgMnO3 – δ

Abstract

Lithium-rich superstoichiometric solid solutions MgLi_xMnO_3 – δ were obtained by intercalation into the spinel MgMnO_3 – δ using lithium hydride LiH as an intercalating agent through the stage of the formation of mechanocomposites. The accompanying chemical transformations involving the hydride ion were studied. Conventional ceramic synthesis methods and alternative intercalating agents were analyzed. It was shown that hydride intercalation produces pure samples of single-phase spinels with high lithium content (MgLi_0.75MnO₃), which is three times higher than that reachable by conventional ceramic synthesis methods.