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Title:
HYDROGEN STORAGE ALLOY AND ITS MANUFACTURE, AND HYDROGEN STORAGE ALLOY ELECTRODE
Document Type and Number:
Japanese Patent JP3266980
Kind Code:
B2
Abstract:

PURPOSE: To obtain an Ni-hydrogen secondary battery having a very high discharging capacitance and maintaining a high capacitance even after repeated charging-discharging.
CONSTITUTION: This is a hydrogen storage alloy having a compsn. expressed by the formula: TiaZr1-a (NibVcMndMee) [in the formula, M=one or two or more kinds of elements selected among Cr, Fe, Co, Mo, W, Al, Cu and Nb as well as 0≤a<0.60, 1.00<b<1.50, 0.10<c<0.50, 0.10<d<0.70, 0.05<e<0.30 and 1.90≤b+c+d+e≤2.30] and substantially constituted of a Laves phase only, and this is a negative electrode for an Ni-hydrogen battery using the same as negative electrode active substance. The melting of the alloy is executed by rapid solidification of 500K/sec or faster from the state of the molten soln., and after the solidification, stress relief annealing may be executed at 550 to 750°C for 1 to 4hr.


Inventors:
Hideya Uenaka
Masayuki Hara
Junji Hisayama
Kojiro Koichi
Kouki Takeshita
Application Number:
JP11843293A
Publication Date:
March 18, 2002
Filing Date:
May 20, 1993
Export Citation:
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Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
C22C1/00; C22C1/02; C22C16/00; C22C19/00; C22C19/03; C22F1/00; C22F1/10; C22F1/18; H01M4/38; (IPC1-7): C22C19/00; C22C1/00; C22C1/02; C22C16/00; C22F1/18; H01M4/38
Domestic Patent References:
JP3289041A
JP5195123A
Attorney, Agent or Firm:
Shoichi Hirose



 
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