Investigations on hydrogen storage over Li-Mg-N-H complex-the effect of compositional changes

Three Li-Mg-N-H samples with LiH/Mg(NH2)2 molar ratio of 1/1, 2/1 and 3/1 were prepared and investigated. Remarkable differences were observed in the temperature dependence of hydrogen desorption, subsequent absorption and P-C isotherms over these three samples. It was revealed that the reduction of LiH content induced the desorption of ammonia. Higher content of LiH pushes the hydrogen desorption to a higher temperature region.