Abstract
High reaction heat of an interaction between intermetallic compounds and hydrogen along with low thermal conductivity of fine dispersed metal hydride powders lead to crisis phenomena in metal hydride hydrogen storage facilities. Thus investigations of composite materials with improved heat transfer are of great interest for development of hydrogen storage technologies. A composite material was made of powders of activated La0.9Ce0.1Ni5-alloy and copper. PCT-isotherms of hydrogen sorption and desorption was measured and compared for the composite and the pure alloy at temperature of 313, 333 and 353K. Values of ΔH and ΔS of the hydrogen sorption and desorption reactions were calculated, and temperature and pressure relaxation in the pure alloy and the composite material beds were studied. A significant difference between hydrogen storage behaviour of the pure alloy and the composite has been revealed.
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