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»ã±¨±êÌâ(Ó¢ÎÄ)£ºLi-N-H System for Hydrogen Storage:An Investigation on Reaction Mechanism and Catalytic Effect
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»ã±¨¹¦·ò£º2015-10-15 09:00
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»ã±¨ÄÚÈݼò½é£ºHydrogen storage is a big challenge for a future hydrogen energy society. The U.S. Department of Energy (DOE) set some technical targets for on-board hydrogen storage systems. The ultimate targets for system gravimetric and volumetric capacities of hydrogen are set to 6.0 wt% and 65 g L-1 in 2020, respectively. Among the hydrogen storage materials, Li-N-H system is an attractive hydrogen storage material, which can be reversible and absorb a large amount of hydrogen (6.5wt. %). In addition, catalyst can improve its kinetics. However, the reaction mechanism and the catalytic effect have not been clearly clarified. In this research we aimed to identify the formation site of LiH and LiNH2 in the process of de/hydrogenation by using transmission electron microscopy (TEM), and then to clarify the catalytic effect. Futhermore, the relationship between desorption properties and lithium ionic mobility has been identified by using AC-impedance method.
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