Chemistry: electrical current producing apparatus – product – and – Sealed cell having gas prevention or elimation means – Prevention or elimination means is one of the cell...
Patent
1995-02-06
1996-07-30
Maples, John S.
Chemistry: electrical current producing apparatus, product, and
Sealed cell having gas prevention or elimation means
Prevention or elimination means is one of the cell...
429223, 429224, 420900, H01M 438
Patent
active
055410189
ABSTRACT:
The present invention provides a hydrogen storing alloy electrode having a large discharging capacity and a long lifetime at a high temperature. The electrode is also excellent in discharging characteristics in the early charging and discharging cycles. In one aspect of the present invention, the hydrogen storing alloy electrode is made of a hydrogen storing alloy represented by the general formula ZrMn.sub.m V.sub.x X.sub.y Ni.sub.z or a hydride thereof, wherein X is Al, Zn or W; m, x, y, and z are respectively mole ratio of Mn, V, X, and Ni to Zr: 0.4.ltoreq.m.ltoreq.0.8, 0.1.ltoreq.x.ltoreq.0.3, 1.0.ltoreq.z.ltoreq.1.5, and 2.0.ltoreq.m+x+y+z.ltoreq.2.4; when X is Al or Zn, 0<y.ltoreq.0.2; and when X is W, 0<y.ltoreq.0.1. The alloy has mainly C15-type Laves phases with a crystal structure of MgCu.sub.2 type face center cubix. The alloy has a crystal lattice constant .alpha. 7.03 angstroms or more and 7.10 angstroms or less.
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Iwaki Tsutomu
Seri Hajime
Tsuji Yoichiro
Yamamura Yasuharu
Maples John S.
Matsushita Electric - Industrial Co., Ltd.
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