Li2z

Li2z is a notional inorganic compound defined by the general formula Li2Z, where Z denotes a metal or metalloid element. The term Li2z is used mainly in theoretical discussions and materials research to explore lithium-rich lattice motifs and defect chemistry. Because Z can be any suitable element, the exact chemical and electronic properties of Li2z are idiosyncratic to the chosen Z.

In proposed models, the structure would feature two lithium ions for every Z-centered unit. The crystal framework is not fixed and depends on Z; common speculative motifs include antifluorite-like cubic lattices or related fluorite-type and layered structures that could accommodate mobile Li+ ions and enable ion transport. Coordination environment and lattice parameters would vary with Z and its oxidation state.

Synthesis and stability are not established for a universal Li2z compound. Hypothetical routes include solid-state reaction of lithium precursors with Z-containing materials under inert or reducing conditions, or electrochemical lithiation of a Z-based host. Li2z phases would be expected to be reactive with moisture and oxygen, as with many lithium-containing solids.

Research status is primarily theoretical or computational, used to illustrate defect formation energies, diffusion pathways, and charge balance in lithium-rich systems. Potential applications discussed in speculative literature include solid-state lithium-ion electrolytes or electrode materials, but no consensus experimental realization of Li2z has been reported.