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Non-stoichiometric AB5 alloys for metal hydride electrodes

Patent ·
OSTI ID:873763
 [1];  [2];  [3];  [4];  [1]
  1. Bellport, NY
  2. Setauket, NY
  3. Calverton, NY
  4. Cold Spring Harbor, NY
+ Show Author Affiliations

The present invention provides a non-stoichiometric alloy comprising a composition having the formula AB.sub.5+X an atomic ratio wherein A is selected from the group consisting of the rare earth metals, yttrium, mischmetal, or a combination thereof; B is nickel and tin, or nickel and tin and at least a third element selected from the group consisting of the elements in group IVA of the periodic table, aluminum, manganese, iron, cobalt, copper, antimony or a combination thereof; X is greater than 0 and less than or equal to about 2.0; and wherein at least one substituted A site is occupied by at least one of the B elements. An electrode incorporating said alloy and an electrochemical cell incorporating said electrode are also described.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY
DOE Contract Number:
AC02-98CH10886
Assignee:
Brookhaven Science Associates (Upton, NY)
Patent Number(s):
US 6238823
OSTI ID:
873763
Country of Publication:
United States
Language:
English

References (11)

From permanent magnets to rechargeable hydride electrodes journal February 1987
Function of cobalt in AB5Hx electrodes journal May 1997
Preparation of intermetallics and hydrides book January 1988
Cerium Content and Cycle Life of Multicomponent  AB 5 Hydride Electrodes journal October 1995
Non-stoichiometric Hydride-Forming Compounds: An Excellent Combination of Long-term Stability and High Electrocatalytic Activity* journal January 1994
The influence of cobalt on the electrochemical cycling stability of LaNi5-based hydride forming alloys journal August 1996
Magnetic Phase Transitions in Intermetallic GdNi 5-x Sn 1+x and TbNi 5-x Sn 1+x Compounds journal August 1997
On the nature of the electrochemical cycling stability of non-stoichiometric LaNi5-based hydride-forming compounds Part I. crystallography and electrochemistry journal August 1994
Electrochemical properties of the LaNi4.6+xSn0.2 system journal May 1996
Corrosion of AB{sub 5} metal hydride electrodes report November 1997
Transmission electron microscopy study of order-disorder phenomena in non-stoichiometric LaNi 5+x and LaNi 6-x Cu x electrode materials journal June 1992

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Related Subjects

/429/420/423/
ab5
alloy
alloy comprising
alloys
aluminum
antimony
atomic
atomic ratio
cell
cell incorporating
cobalt
combination
composition
comprising
consisting
copper
described
earth
earth metal
earth metals
electrochemical
electrochemical cell
electrode
electrodes
element
element selected
elements
equal
formula
hydride
incorporating
iron
iva
manganese
metal
metal hydride
metals
mischmetal
nickel
non-stoichiometric
occupied
periodic
periodic table
provides
rare
rare earth
ratio
selected
site
substituted
table
third
yttrium