Mechanochemical Approaches to the Development of Materials for Hydrogen Accumulation on the Basis of Metal Hydrides
I. G. KONSTANCHUK1, K. B. GERASIMOV1 and J.-L. BOBET2
1Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Ul. Kutateladze 18, Novosibirsk 630128 (Russia)
E-mail: irina@solid.nsc.ru
2Institut de Chimie de la Matiere Condensee de Bordeaux ICMCB-CNRS, Universite Bordeaux 1, 87 Av. Schweitzer, F-33608 Pessac (France)
Keywords: mechanochemical treatment, mechanical alloying, metal hydrides, hydrogen storage
Pages: 1-9
Abstract
Various mechanochemical approaches to improving the sorption properties of metal materials accumulating hydrogen are discussed. Some experimental results illustrating the possibilities of each approach are presented. It is established that the sorption characteristics of known metal accumulators of hydrogen can be improved by affecting their structure, morphology and surface properties with the help of the mechanical activation and mechanical alloying with various kinds of additives. The possibility to search for new hydrogen-absorbing materials through the mechanochemical synthesis of metastable composites of components of various natures including thermodynamically immiscible components was demonstrated. These composites may possess a high reactivity with respect to hydrogen and serve as precursors for the synthesis of new phases. The synthesis of intermetallic compounds and hydride phases directly during the mechanochemical treatment also opens opportunities for the preparation of new materials promising for hydrogen storage.
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