Paper Title
Characterization of Lithium Aluminium Hydride Thin Film Deposited on Glass Substrate using Dip Coating Method

Abstract
Complex metal hydrides are one of the most effective hydrogen storage materials due to their unique property to absorb and desorb hydrogen with the hydrogen storage capacity of about 5-7 wt%. In this study, lithium aluminium hydride was coated on glass substrate using dip coating method. The coating conditions investigated were lithium aluminium hydride concentrations of 6 g/l, 10 g/l and 20 g/l, and post-annealing time from 0 to 60 min. Phase and grain size of the lithium aluminium hydride were analysed using X-ray powder diffraction. Scanning electron microscope was used for surface morphology analysis. The experimental results revealed that the phase of the deposited thin film of lithium aluminium hydride on glass substrate is mixed with lithium aluminium hydroxide hydrate. A proper deposition condition that makes the least oxide or no oxide is sought. This is because water in air oxidised with lithium aluminium hydride and thus its ultimate hydrogen storage yield decreased. From this research, the lithium aluminium hydroxide hydrate tends to decrease with increasing grain size. The lithium aluminium hydride of 20 g/l and post-annealing time at 60 min is the most suitable conditions due to the lowest intensities of lithium aluminium hydroxide hydrate. Nevertheless, oxide-free lithium aluminium hydride is targeted. Keywords - Hydrogen Storage, Lithium Aluminium Hydride, Dip Coating, Metal Hydride Thin Film