Guidelines for Developing Amide-Based Hydrogen Storage Materials

Abstract

An effective method for developing amide-based high-performance hydrogen storage materials is to prepare appropriate combinations of amides and hydrides. We have proposed that a mixture of an amide with a low decomposition temperature and a hydride showing rapid reaction to ammonia would be an appropriate combination. According to this proposal, the mixture of Mg(NH 2 ) 2 (Mg amide) and LiH (Li hydride) was investigated. The dehydriding temperature of the mixture of Mg(NH 2 ) 2 and 4ÁLiH is lower than that of the mixture of LiNH 2 (Li amide) and 2ÁLiH. A method for preventing ammonia release is increasing the LiH ratio in the mixtures, which results in a reduction in the amount of desorbed hydrogen. The homogeneous dispersion between Mg(NH 2 ) 2 and LiH might be also an important factor for preventing ammonia release