Improvements relating to energy storage systems

TLDR: In this paper, a hydrogen storage electrode for use in a storage cell, for example one in which the other electrode comprises an air or oxygen electrode, comprises a mass of a material with a large surface area, preferably in particulate form, with at least the surface layer comprising a titanium alloy which has a beta structure at the operating temperature of the cell and at least a surface has thereon at least one metal such as Fe, Mo, Ni, Pt, Ir, Rh, Pd, Os or Ru which facilitates the entry of hydrogen into and out of the titanium alloy.

Abstract: 1,209,083. Energy storage systems. IMPERIAL METAL INDUSTRIES (KYNOCH) Ltd. 24 Jan., 1969 [7 Feb., 1968], No. 6063/68. Heading H1B. [Also in Division C7] A hydrogen storage electrode for use in a storage cell, for example one in which the other electrode comprises an air or oxygen electrode, comprises a mass of a material with a large surface area, preferably in particulate form, with at least the surface layer comprising a titanium alloy which has a beta structure at the operating temperature of the cell and at least the said surface has thereon at least one metal such as Fe, Mo, Ni, Pt, Ir, Rh, Pd, Os or Ru which facilitates the entry of hydrogen into and out of the titanium alloy. The whole of the mass may consist of titanium alloy which term includes substantially pure titanium metal. All-beta phase alloys which can be used are binary alloys of titanium with at least 15 weight per cent molybdenum, or with more than 15 weight per cent vanadium, or with more than 30 weight per cent niobium, or with more than 40 weight per cent tantalum. An alloying metal which also facilitates the diffusion of hydrogen may be used, and may be the same as the element on the surface of the alloy, e.g. molybdenum.