Alloys or metallic compositions – Hydrogen storage
Patent
1997-10-30
2000-08-22
Ip, Sikyin
Alloys or metallic compositions
Hydrogen storage
420416, 420455, 429 59, 429218, 429223, H01M 438, H01M 424, C22C 500
Patent
active
061067695
ABSTRACT:
A hydrogen absorbing alloy composition for a nickel-hydrogen secondary battery which includes LnNi.sub.5 hydrogen absorbing alloy, where Ln represents at least one rare-earth element. The hydrogen absorbing alloy composition also includes at least one compound selected from the group consisting of heavy rare-earth oxides, heavy rare-earth hydroxides, compound oxides including at least one rare-earth element and compound hydroxides including at least one rare-earth element. Rare-earth elements can be selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. Exemplary hydrogen absorbing alloy compositions include La alone or in combination with one other rare-earth element, such as Ce, Pr, Nd, or Sm. Exemplary rare-earth oxides include Yb.sub.2 O.sub.3, Er.sub.2 O.sub.3 and GdO.sub.3 and exemplary rare-earth hydroxides include Yb(OH).sub.3 and Er(OH).sub.3.
REFERENCES:
patent: 4459341 (1984-07-01), Marchant et al.
Patent Abstracts of Japan, vol. 096, No. 007, Jul. 31, 1996 and JP 098 083623 A.
Patent Abstracts of Japan, vol. 012, No. 193, Jun. 4, 1988 and JP 62 296365 A.
European Search Report. for application EP97 30 8723, Feb. 16, 1998.
Shinya Naofumi
Sugahara Hiroto
Ip Sikyin
Shin-Etsu Chemical Co. , Ltd.
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