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Ultrafine Hydrogen Storage Powders

Ames Laboratory

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Technology Marketing SummaryThis invention provides for composition and method of making extremely fine powders for storing hydrogen.DescriptionThe use of the powders decreases problems that are normally encountered when storage powders repeatedly experience during absorption and then desorption of the hydrogen. In the case of batteries, this repeated expansion and contraction can cause diminished recharge capacity and even inactivity because of fracture of the electrode. These powders have applications in batteries, particularly those composed of nickel/metal hydride; hydrogen absorption refrigerators (cryocoolers); and other devices that incorporate the need to encompass reversible gas phase absorption/desorption of hydrogen.Applications and IndustriesThese powders have applications in batteries, particularly those composed of nickel/metal hydride; hydrogen absorption refrigerators (cryocoolers); and other devices that incorporate the need to encompass reversible gas phase absorption/desorption of hydrogen.Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Patent 6,074,453
Patent
6,074,453
Ultrafine hydrogen storage powders
A method of making hydrogen storage powder resistant to fracture in service involves forming a melt having the appropriate composition for the hydrogen storage material, such, for example, LaNi.sub.5 and other AB.sub.5 type materials and AB.sub.5+x materials, where x is from about -2.5 to about +2.5, including x=0, and the melt is gas atomized under conditions of melt temperature and atomizing gas pressure to form generally spherical powder particles. The hydrogen storage powder exhibits improved chemcial homogeneity as a result of rapid solidfication from the melt and small particle size that is more resistant to microcracking during hydrogen absorption/desorption cycling. A hydrogen storage component, such as an electrode for a battery or electrochemical fuel cell, made from the gas atomized hydrogen storage material is resistant to hydrogen degradation upon hydrogen absorption/desorption that occurs for example, during charging/discharging of a battery. Such hydrogen storage components can be made by consolidating and optionally sintering the gas atomized hydrogen storage powder or alternately by shaping the gas atomized powder and a suitable binder to a desired configuration in a mold or die.
Ames Laboratory 06/13/2000
Issued
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
1932DevelopmentAvailable12/07/201012/15/2010

Contact AMES About This Technology

To: Stacy Joiner<joiner@ameslab.gov>