Phase equilibria involving solid solutions in the Li–Mn–O system

Phase equilibria involving LiMn2O4-, Li2MnO3-, LiMnO2-, Mn3O4-, and MnO-base solid solutions were studied with varied temperature and partial oxygen pressure. The $${P_{{o_2}}}$$ –T and x–y projections of the P–T–x–y phase diagram of the Li–Mn−O system were constructed, as well as the key x–y isotherms of the Li2O–MnO–MnO2 quasi-ternary system. In some experiments, the authors’ hydride lithiation method was employed to prepare lithium-rich homogeneous three-component nonstoichiometric phases.