Accession Number : ADA328073

Title :   State-of-the-Art Review of Hydrogen Storage in Reversible Metal Hydrides for Military Fuel Cell Applications.

Descriptive Note : Final Rept. 5 Nov 96-24 Jul 97,

Corporate Author : SUNATECH INC

Personal Author(s) : Sandrock, Gary

PDF Url : ADA328073

Report Date : 24 JUL 1997

Pagination or Media Count : 169

Abstract : This report is a comprehensive review of reversible metal hydrides for possible use as hydrogen storage and supply media for proton exchange membrane (PEM) fuel cells. There is considerable interest in using fuel cells for submarine and other military power sources. First presented is a tutorial overview of the phenomenology and important technical properties of metal hydrides, followed by a guide to sources of information on the subject. The main part of the review summarizes the hydriding properties and use potential of the elements, solid-solution alloys and five classes of intermetallic compounds: AB5, AB2, AB, A2B and miscellaneous others. It also briefly reviews the complex (normally nonreversible) hydrides, unconventional alloys and carbon. Emphasis is on hydrides that can use the waste heat of PEM fuel cells (0-100 deg C) to release H2 in the 1-10 atmosphere pressure range, although other hydrides are also partly covered. Although there are many available alloys with useful properties, shortcomings remain especially in the areas of H-capacity, cost and resistance to impurity gases in the H2 used. Further R&D activities aimed at overcoming some of the shortcomings are suggested.

Descriptors :   *HYDRIDES, *HYDROGEN, *MILITARY APPLICATIONS, *STORAGE, *FUEL CELLS, *METAL COMPOUNDS, *INTERMETALLIC COMPOUNDS, STATE OF THE ART, RESISTANCE, CARBON, ALLOYS, PROTONS, IMPURITIES, GASES, REVERSIBLE, POWER SUPPLIES, WASTES, HEAT, SUBMARINES, SOLID SOLUTIONS.

Subject Categories : Inorganic Chemistry
      Electrochemical Energy Storage
      Logistics, Military Facilities and Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE