THE STRUCTURAL OUTLINES OF HYDROGEN STORAGE ALLOYS

In order to improve sorption properties, intermetallic compounds of AB (n) types are alloyed by partial substitution of either A or B or both by other elements in the simplest case. As a result, theoretical comp osition formulae of hydrogen storage alloys may be obtained by means o f gradual transition from binary to ternary, quaternary and more multi -component alloys. The experimentally studied general composition form ulae of hydrogen storage alloys based on LaNi5, MmNi(5), TiFe, TiCr2, TiMn2, ZrCr2, ZrFe2, ZrMn2, Mg2Ni, and CaNi5 are described as the resu lt of the generalization of published papers. In a number of cases, su bstitution of any main component of the basic intermetallic by several elements of the-same type, in varying quantities, gives-an effect sim ilar to complex alloying of design alloys. The possible new directions of investigations are proposed on the basis of comparison of concrete and theoretical composition formulae of hydrogen storage alloys. Copy right (C) 1996 Published by Elsevier Science Ltd on behalf of Internat ional Association for Hydrogen Energy