Effect of the structural evolution on the ionic conductivity of Li-N-H system during the dehydrogenation

On the way to transform lithium amide (LiNH2) into lithium imide (Li2NH) by releasing H2, the 1:1 molar mixture of LiNH2-LiH forms cubic ( F m 3 ¯ m ) non-stoichiometric complex hydride phases (Li1+ x NH2− x ; 0 10−4 S·cm−1 at room temperature) having an electrochemical stability window >5 V. The study suggests that the Li-N-H system may be a prospective electrolyte in the all-solid-state Li-ion battery, in addition to its use as a reversible hydrogen storage material.