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

Abstract

A hydrogen storage ability caused by the interaction between nanostructured carbon (Cnano Hx) 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 Cnano Hx and LiH exhibited promising hydrogen storage properties with a rechargeable hydrogen capacity of more than 4 mass% below 350 °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 Li2 C2 after hydrogen desorption, leading to poorer hydrogen rechargeability. © 2005 American Institute of Physics.