Hydrogen-occluding alloy and hydrogen-occluding alloy electrode
AssigneesImra Material R&D Co., Ltd., Agency of Industrial Science and Technology
InventorsMakoto Tsukahara, Kunio Takahashi, Takahiro Mishima, Akihito Isomura, Tetsuo Sakai, Hiroshi Miyamura, Itsuki Uehara
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Abstract
Disclosed are a hydrogen-occluding alloy electrode comprising an alloy powder wherein the alloy comprises a Ti--V solid solution mother phase and a secondary phase predominantly containing a Ti--Ni phase or an AB.sub.2 Laves phase in which the secondary phase forms a three-dimensional reticulate skeleton in the alloy; said hydrogen-occluding alloy powder surface-treated with hydrofluoric acid to provide a titanium hydride surface and surface-coated with at least one metal of Ni, Cu and Co.
Claims5
A hydrogen-occluding alloy electrode comprising an alloy powder wherein the alloy comprises a Ti--V solid solution mother phase and a secondary phase containing a Ti--Ni phase,
- said alloy having the formulation TiV.sub..sigma. Ni.sub..beta. M.sub.65 wherein M is at least one element selected from the group consisting of Co, Cu and Nb, and 1.ltoreq..alpha..ltoreq.10, 0.2.ltoreq..beta..ltoreq.2 and 0.02.ltoreq..gamma..ltoreq.0.5,
- said secondary phase having the formulation TiNi.sub..delta. N.sub..epsilon. wherein N is at least one element selected from the group consisting of V, Co, Cu and Nb, and 0.5.ltoreq..delta..ltoreq.2 and 0.1.ltoreq..epsilon..ltoreq.1, and forming a three-dimensional reticulate skeleton in the alloy.
Dependencies are inferred from the claim text.