Ternary imides for hydrogen storage

Abstract

The role of ternary Li-alkali earth metal imides for hydrogen storage was investigated. The ternary imides were synthesized by mixing, heating, hydrogenating and dehydrogentaing lithium amide with corresponding hydrides of alkali earth metals. It was found that about 1.7 hydrogen atoms were adsorbed by one Li-Ca-N-H molecule, of which ∼ 10% could be released at relatively high pressures. It was observed that hydrogen storage capacity, kinetics and thermodynamics of the lithium compounds changed with the chemical compositions.