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Title: Ultrafine hydrogen storage powders

Abstract

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.

Inventors:
 [1];  [2];  [1];  [1];  [1];  [3];  [4];  [4];  [5]
  1. (Ames, IA)
  2. (Doylestown, PA)
  3. (La Mesa, CA)
  4. (Pasadena, CA)
  5. (Arcadia, CA)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
OSTI Identifier:
873032
Patent Number(s):
US 6074453
Application Number:
08/959,167
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA); California Institute of Technology (Pasadena, CA) AMES
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
ultrafine; hydrogen; storage; powders; method; powder; resistant; fracture; service; involves; forming; melt; appropriate; composition; material; example; lani; type; materials; -2; including; gas; atomized; conditions; temperature; atomizing; pressure; form; spherical; particles; exhibits; improved; chemcial; homogeneity; result; rapid; solidfication; particle; size; microcracking; absorption; desorption; cycling; component; electrode; battery; electrochemical; fuel; cell; degradation; occurs; charging; discharging; components; consolidating; optionally; sintering; alternately; shaping; suitable; binder; desired; configuration; mold; die; electrochemical fuel; melt temperature; fuel cell; atomized powder; gas atomized; particle size; gas pressure; hydrogen storage; powder particles; involves forming; atomizing gas; desired configuration; storage material; storage powder; suitable binder; exhibits improved; hydrogen absorption; spherical powder; type materials; chemical fuel; type material; /75/148/419/420/429/

Citation Formats

Anderson, Iver E., Ellis, Timothy W., Pecharsky, Vitalij K., Ting, Jason, Terpstra, Robert, Bowman, Robert C., Witham, Charles K., Fultz, Brent T., and Bugga, Ratnakumar V. Ultrafine hydrogen storage powders. United States: N. p., 2000. Web.
Anderson, Iver E., Ellis, Timothy W., Pecharsky, Vitalij K., Ting, Jason, Terpstra, Robert, Bowman, Robert C., Witham, Charles K., Fultz, Brent T., & Bugga, Ratnakumar V. Ultrafine hydrogen storage powders. United States.
Anderson, Iver E., Ellis, Timothy W., Pecharsky, Vitalij K., Ting, Jason, Terpstra, Robert, Bowman, Robert C., Witham, Charles K., Fultz, Brent T., and Bugga, Ratnakumar V. Tue . "Ultrafine hydrogen storage powders". United States. https://www.osti.gov/servlets/purl/873032.
@article{osti_873032,
title = {Ultrafine hydrogen storage powders},
author = {Anderson, Iver E. and Ellis, Timothy W. and Pecharsky, Vitalij K. and Ting, Jason and Terpstra, Robert and Bowman, Robert C. and Witham, Charles K. and Fultz, Brent T. and Bugga, Ratnakumar V.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 13 00:00:00 EDT 2000},
month = {Tue Jun 13 00:00:00 EDT 2000}
}

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