Rechargeable hydrogen storage in nanostructured mixtures of hydrogenated carbon and lithium hydride

A hydrogen storage ability caused by the interaction between nanostructured carbon (CnanoHx) and lithium hydride (LiH) is demonstrated, which should be recognized as Li-C-H system in the H-storage materials. Especially, the 2: 1 mixture of CnanoHx and LiH exhibited promising hydrogen storage properties with a rechargeable hydrogen capacity of more than 4 mass% below 350 degrees C, preserving the nanostructural feature in the mixture even after hydrogen release. On the other hand, the 1: 2 and 1: 1 mixtures exhibited the crystal growth of Li2C2 after hydrogen desorption, leading to poorer hydrogen rechargeability. (c) 2005 American Institute of Physics.