US5096667A
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Catalytic hydrogen storage electrode materials for use in electrochemical cells and electrochemical cells incorporating the materials
Assignee: Ovonic Battery Co Inc
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Filing: 1989-11-24
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Granted: 1992-03-17
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Expires: 2009-11-24
Abstract
Abstract Disclosed is a reversible, electrochemical cell having a high electrochemical activity, hydrogen storage negative electrode. The negative electrode is formed of a reversible, multicomponent, multiphase, electrochemical hydrogen storage alloy. The hydrogen storage alloy is capable of electrochemically charging and discharging hydrogen in alkaline aqueous media. In one preferred exemplification the hydrogen storage alloy is a member of the family of hydrogen storage alloys, derived from the V-Ti-Zr-Ni and V-Ti-Zr-Ni-Cr alloys in which the V, Ti, Zr, Ni and Cr are partially replaced by one or more modifiers, and the alloy has the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a M'.sub.b M".sub.c M d iv where x' is between 1.8 and 2.2, x is between 0 and 1.5, y' is between 3.6 and 4.4, y is between 0.6 and 3.5, z is between 0.00 and 1.44, a designates that the V-Ni-Ti-Zr-Cr component as a group is from 70 to 100 atomic percent of the alloy, b,c,d,e, . . . , are the coefficients on the modifiers, and M', M", M iii , and M iv are modifiers which may be individually or collectively up to 30 atomic percent of the total alloy. The modifiers, M', M", M iii , and M iv are chosen from Al, Mn, Mo, Cu, W, Fe, Co, and combinations thereof.
Inventors
- 👤 Michael A. Fetcenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:34
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M4/383; C; C01; C01B; C01B3/00; C01B3/0005; C01B3/001; C01B3/0018; C01B3/0031; C22; C22C; C22C30/00; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/32; Y10; Y10S; Y10S420/00; Y10S420/90
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
143 words
A V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy in which the V, Ti, Zr, Ni and Cr are individually or collectively partially replaced by one or more modifiers, and the alloy has the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d where x' is between 1.8 and 2.2, x is between 0 and 1.5, y' is between 3.6 and 4.4, y is between 0.6 and 3.5, z is between 0.00 and 1.44, a designates that the V-Ni-Ti-Zr-Cr component, (V y'-y Ni y Ti x'-x Zr x Cr z ), as a group, is at least 70 atomic percent of the alloy, each of b, c, and d is from 0 to 20 atomic percent of the alloy, the sum of c+d is a positive number and the sum of b+c+d is an effective amount of modifiers up to 30 atomic percent of the alloy.
Claim 2
Dependent Claim
143 words
A V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy in which the V, Ti, Zr, Ni and Cr are individually or collectively partially replaced by one or more modifiers, and the alloy has the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d where x' is between 1.8 and 2.2, x is between 0 and 1.5, y' is between 3.6 and 4.4, y is between 0.6 and 3.5, z is between 0.00 and 1.44, a designates that the V-Ni-Ti-Zr-Cr component, (V y'-y Ni y Ti x'-x Zr x Cr z ), as a group, is at least 70 atomic percent of the alloy, each of b, c, and d is from 0 to 20 atomic percent of the alloy, the sum of c+d is a positive number and the sum of b+c+d is an effective amount of modifiers up to 30 atomic percent of the alloy.
Claim 3
Dependent Claim
26 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 1 wherein the Co modifier partially replaces one or ore of V and Ni, and partially replaces V-Ti-Zr-Ni-Cr.
Claim 4
Dependent Claim
17 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 1 wherein the Mn and Al partially replace V-Ti-Zr-Ni-Cr.
Claim 5
Dependent Claim
25 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 3 having the composition within the homogeneity range of V.sub.20.6 Ti.sub.15 Zr.sub.15 Ni.sub.30 Dr.sub.6.6 Co.sub.6.6 Mn.sub.3.6 Al.sub.2.7.
Claim 6
Dependent Claim
38 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 4 wherein the alloy is a multiphase alloy and individual phases of the alloy have compositions within the homogeneity ranges of: (i) Zr:Ti:Ni:V:Co:Mn:Al=92.3:1.3:5.4:0.7:0.3; (ii) V:Ti:Zr:Ni:Cr:Co:Mn:Al=19.6:14.8:17.0:28.7:6.8:8.0:4.0:1.2; (iii) Ti:Zr:Ni:V:Co:Mn:Al=32.3:42.5:7.2:6.2:1.0:6.3:1.5:3.2; and (iv) V:Cr:Ti:Zr:Ni:Co:Mn:Al=58.4:26.4:3.3:1.3:3.0:3.8:0.0.
Claim 7
Dependent Claim
30 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 5 having increased cycle life with respect to the cycle life of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 8
Dependent Claim
30 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 5 having increased mid-point voltage with respect to the midpoint voltage of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 9
Dependent Claim
32 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 5 having increased low temperature capacity with respect to the low temperature capacity of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 10
Dependent Claim
32 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 5 having increased low temperature voltage with respect to the low temperature voltage of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 11
Dependent Claim
30 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 5 having reduced internal resistance with respect to the internal resistance of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 12
Dependent Claim
30 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 14 having increased cycle life with respect to the cycle life of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 13
Dependent Claim
30 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 1 having increased mid-point voltage with respect to the midpoint voltage of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 14
Dependent Claim
32 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 1 having increased low temperature capacity with respect to the low temperature capacity of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 15
Dependent Claim
32 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 1 having increased low temperature voltage with respect to the low temperature voltage of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 16
Dependent Claim
30 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 1 having reduced internal resistance with respect to the internal resistance of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 17
Dependent Claim
130 words
A reversible, multicomponent V-Ti-Zr-Ni-Cr- electrochemical hydrogen storage alloy having at least one modifier therein which increases the low temperature voltage of the alloy measured in a sealed, rechargeable, electrochemical cell, said alloy having the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d wherein x' is between 1.8 and 2.2, x is between 0 and 1.5, y' is between 3.6 and 4.4, y is between 0.6 and 3.5, z is between 0.00 and 1.44, a designates that the V-Ni-Ti-Zr-Cr component (V 4-y Ni y Ti 2-x Zr x Cr z ), as a group, is at least 70 atomic percent of the alloy, the sum of c+d is a positive number and the sum of b+c+d is an effective amount of modifiers up to 30 atomic percent of the alloys.
Claim 18
Dependent Claim
130 words
A reversible, multicomponent V-Ti-Zr-Ni-Cr- electrochemical hydrogen storage alloy having at least one modifier therein which increases the low temperature voltage of the alloy measured in a sealed, rechargeable, electrochemical cell, said alloy having the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d wherein x' is between 1.8 and 2.2, x is between 0 and 1.5, y' is between 3.6 and 4.4, y is between 0.6 and 3.5, z is between 0.00 and 1.44, a designates that the V-Ni-Ti-Zr-Cr component (V 4-y Ni y Ti 2-x Zr x Cr z ), as a group, is at least 70 atomic percent of the alloy, the sum of c+d is a positive number and the sum of b+c+d is an effective amount of modifiers up to 30 atomic percent of the alloys.
Claim 19
Dependent Claim
20 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 16 wherein the Mn and Al partially replace V-Ti-Zr-Ni-Cr as a group.
Claim 20
Dependent Claim
23 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 17 having a composition within the homogeneity range of V.sub.20.6 Ti.sub.15 Ni.sub.30 Cr.sub.6.6 Mn.sub.3.6 Al.sub.2.7.
Claim 21
Dependent Claim
133 words
A reversible, multicomponent V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy having at least one modifier therein which increases the low temperature hydrogen storage capacity of the alloy measured in a sealed, rechargeable, electrochemical cell, said alloy having the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d where x' is between 1.8 and 2.2, x is between 0 and 1.5, y' is between 3.6 and 4.4, y is between 0.6 and 3.6, z is between 0.00 and 1.44, a designates that the V-Ni-Ti-Zr-Cr component, (V 4-y Ni y Ti 2-x Zr x Cr z ), as a group, is at least 70 atomic percent of the alloy, and the sum of c+d is a positive number and the sum of b+c+d is an effective amount of modifiers up to 30 atomic percent of the alloys.
Claim 22
Dependent Claim
133 words
A reversible, multicomponent V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy having at least one modifier therein which increases the low temperature hydrogen storage capacity of the alloy measured in a sealed, rechargeable, electrochemical cell, said alloy having the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d where x' is between 1.8 and 2.2, x is between 0 and 1.5, y' is between 3.6 and 4.4, y is between 0.6 and 3.6, z is between 0.00 and 1.44, a designates that the V-Ni-Ti-Zr-Cr component, (V 4-y Ni y Ti 2-x Zr x Cr z ), as a group, is at least 70 atomic percent of the alloy, and the sum of c+d is a positive number and the sum of b+c+d is an effective amount of modifiers up to 30 atomic percent of the alloys.
Claim 23
Dependent Claim
26 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 19 wherein the Co modifier partially replaces one or more of V and Ni, and partially replaces V-Ti-Zr-Ni-Cr.
Claim 24
Dependent Claim
24 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 19 having a composition within the homogeneity range of V.sub.20.6 Ti.sub.15 Zr.sub.15 Ni.sub.30 Cr.sub.6.6 Mn.sub.3.6 Al.sub.2.7.
Claim 25
Dependent Claim
129 words
A reversible, multicomponent V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy having at least one modifier therein which increases the specific capacity of the alloy measured in a sealed, rechargeable, electrochemical cell, said alloy having the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d where x' is between 1.8 and 2.2, x is between 0 and 1.5, y' is between 3.6 and 4.4, y is between 0.6 and 3.6, z is between 0.00 and 1.44, a designates that the V-Ni-Ti-Zr-Cr component, (V 4-y Ni y Ti 2-x Zr x Cr z ), as a group, is at least 70 atomic percent of the alloy, the sum of c+d is a positive number and the sum of b+c+d is an effective amount of modifiers up to 30 atoms percent of the alloys.
Claim 26
Dependent Claim
129 words
A reversible, multicomponent V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy having at least one modifier therein which increases the specific capacity of the alloy measured in a sealed, rechargeable, electrochemical cell, said alloy having the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d where x' is between 1.8 and 2.2, x is between 0 and 1.5, y' is between 3.6 and 4.4, y is between 0.6 and 3.6, z is between 0.00 and 1.44, a designates that the V-Ni-Ti-Zr-Cr component, (V 4-y Ni y Ti 2-x Zr x Cr z ), as a group, is at least 70 atomic percent of the alloy, the sum of c+d is a positive number and the sum of b+c+d is an effective amount of modifiers up to 30 atoms percent of the alloys.
Claim 27
Dependent Claim
24 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 22 having a composition within the homogeneity range of V.sub.20.6 Ti.sub.15 Zr.sub.15 Ni.sub.30 Cr.sub.6.6 Mn.sub.3.6 Al.sub.2.7.
Claim 28
Dependent Claim
132 words
A reversible, multicomponent V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy having at least one modifier there in which increases the midpoint voltage on discharge of the alloy measured in a sealed, rechargeable, electrochemical cell, said alloy having the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d where x' is between 1.8 and 2.2, x is between 0 and 1.5, y' is between 3.6 and 4.4, y is between 0.6 and 3.5, z is between 0.00 and 1.44, a designates that the V-Ni-Ti-Zr-Cr component, (V y'-y Ni y Ti 2-x Zr x Cr z ), as a group, is at least 70 atomic percent of the alloy, the sum of c+d is a positive number and the sum of b+c+d is an effective amount of modifiers up to 30 atomic percent of the alloys.
Claim 29
Dependent Claim
132 words
A reversible, multicomponent V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy having at least one modifier there in which increases the midpoint voltage on discharge of the alloy measured in a sealed, rechargeable, electrochemical cell, said alloy having the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d where x' is between 1.8 and 2.2, x is between 0 and 1.5, y' is between 3.6 and 4.4, y is between 0.6 and 3.5, z is between 0.00 and 1.44, a designates that the V-Ni-Ti-Zr-Cr component, (V y'-y Ni y Ti 2-x Zr x Cr z ), as a group, is at least 70 atomic percent of the alloy, the sum of c+d is a positive number and the sum of b+c+d is an effective amount of modifiers up to 30 atomic percent of the alloys.
Claim 30
Dependent Claim
24 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 24 having a composition with the homogeneity range of V.sub.20.6 Ti.sub.15 Zr.sub.15 Ni.sub.30 Cr.sub.6.6 Mn.sub.3.6 Al.sub.2.7.
Claim 31
Dependent Claim
129 words
A reversible, multicomponent V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy having at least one modifier therein which increases the cycle lift of the alloy measured in a sealed, rechargeable, electrochemical cell, said alloy having the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d where x' is between 1.8 and 2.2, x is between 0 and 1.5, y' is between 3.6 and 4.4, y is between 0.6 and 3.5, z is between 0.00 and 1.44, a designates that the V-Ni-Ti-Zr-Cr component, (V 4-y Ni y Ti 2-x Zr x Cr z ), as a group, is at least 70 atomic percent of the alloy, the sum of c+d is a positive number and the sum of b+c+d is an effective amount of modifiers up to 30 atomic percent of the alloys.
Claim 32
Dependent Claim
129 words
A reversible, multicomponent V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy having at least one modifier therein which increases the cycle lift of the alloy measured in a sealed, rechargeable, electrochemical cell, said alloy having the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d where x' is between 1.8 and 2.2, x is between 0 and 1.5, y' is between 3.6 and 4.4, y is between 0.6 and 3.5, z is between 0.00 and 1.44, a designates that the V-Ni-Ti-Zr-Cr component, (V 4-y Ni y Ti 2-x Zr x Cr z ), as a group, is at least 70 atomic percent of the alloy, the sum of c+d is a positive number and the sum of b+c+d is an effective amount of modifiers up to 30 atomic percent of the alloys.
Claim 33
Dependent Claim
24 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 26 having a composition within the homogeneity range of V.sub.20.6 Ti.sub.15 Zr.sub.15 Ni.sub.30 Cr.sub.6.6 Mn.sub.3.6 Al.sub.2.7.
Claim 34
Dependent Claim
23 words
A modified V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy having a composition within the homogeneity range of V.sub.20.6 Ti.sub.15 Zr.sub.15 Ni.sub.30 Cr.sub.6.6 Co.sub.6.6 Mn.sub.3.6 Al.sub.2.7.
Claim 35
Dependent Claim
23 words
A modified V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy having a composition within the homogeneity range of V.sub.20.6 Ti.sub.15 Zr.sub.15 Ni.sub.30 Cr.sub.6.6 Co.sub.6.6 Mn.sub.3.6 Al.sub.2.7.
Claim 36
Dependent Claim
37 words
The modified V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 28 wherein is a multiphase alloy and individual phases of the alloy have compositions within the homogeneity ranges of: (i) Zr:Ti:Ni:V:Co:Mn:Al=92.3:1.3:5.4:0.7:0.3; (ii) V:Ti:Zr:Ni:Cr:Co:Mn:Al=19.6:14.8:17.0:28.7:6.8:8.0:4.0:1.2; (iii) Ti:Zr:Ni:V:Co:Mn:Al=32.3:42.5:7.2:6.2:1.0:6.3:1.5:3.2; and (iv) V:Cr:Ti:Zr:Ni:Co:Mn:Al=58.4:26.4:3.3:1.3:3.0:3.8:0.0.
Claim 37
Dependent Claim
30 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 28 having increased cycle life with respect to the cycle life of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 38
Dependent Claim
30 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 28 having increased mid-point voltage with respect to the midpoint voltage of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 39
Dependent Claim
32 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 28 having increased low temperature capacity with respect to the low temperature capacity of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 40
Dependent Claim
32 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 28 having increased low temperature voltage with respect to the low temperature voltage of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 41
Dependent Claim
30 words
The V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy of claim 28 having reduced internal resistance with respect to the internal resistance of V 4-y Ni y Ti 2-x Zr x Cr z
Claim 42
Dependent Claim
69 words
A V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy as in claim 1, including a modifier "M" selected from the group consisting essentially of Mo, Cu, W, Fe and combinations thereof wherein the alloy has the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d M.sub.3 and e is from 0 to 20 atomic percent of the alloy and the sum of b+c+d+e is up to 30 atomic percent of the alloy.
Claim 43
Dependent Claim
75 words
A V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy as in claim 16, including a modifier "M" selected from the group consisting essentially of Mo, Cu, W, Fe and combinations thereof wherein the alloy has the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d M.sub.e and each of b, c, d and e is from 0 to 20 atomic percent of the alloy and the sum of b+c+d+e is up to 30 atomic percent of the alloy.
Claim 44
Dependent Claim
75 words
A V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy as in claim 19, including a modifier "M" selected from the group consisting essentially of Mo, Cu, W, Fe and combinations thereof wherein the alloy has the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d M.sub.e and each of b, c, d and 3 is from 0 t 20 atomic percent of the alloy and the sum of b+c+d+e is up to 30 atomic percent of the alloy.
Claim 45
Dependent Claim
75 words
A V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy as in claim 22, including a modifier "M" selected from the group consisting essentially of Mo, Cu, W, Fe and combinations thereof wherein the alloy has the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d M.sub.e and each of b, c, d and e is from 0 to 20 atomic percent of the alloy and the sum of b+c+d+e is up to 30 atomic percent of the alloy.
Claim 46
Dependent Claim
75 words
A V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy as in claim 24 including a modifier "M" selected from the group consisting essentially of Mo, Cu, W, Fe and combinations thereof wherein the alloy has the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d M.sub.e and each of b, c, d and e is from 0 to 20 atomic percent of the alloy and the sum of b+c+d+e is up to 30 atomic percent of the alloy.
Claim 47
Dependent Claim
75 words
A V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy as in claim 26, including a modifier "M" selected from the group consisting essentially of Mo, Cu, W, Fe and combinations thereof wherein the alloy has the composition: (V.sub.y'-y Ni.sub.y Ti.sub.x'-x Zr.sub.x Cr.sub.z).sub.a Co.sub.b Mn.sub.c Al.sub.d M.sub.e and each of b, c, d and 3 is from 0 to 20 atomic percent of the alloy and the sum of b+c+d+e is up to 30 atomic percent of the alloy.
Claim 48
Dependent Claim
23 words
A modified V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy having a composition within the homogeneity range of: V.sub.22 Ti.sub.16 Zr.sub.16 Ni.sub.27.8 Cr.sub.7 Co.sub.5.9 Mn.sub.3.1 Al.sub.2.2.
Claim 49
Dependent Claim
23 words
A modified V-Ti-Zr-Ni-Cr electrochemical hydrogen storage alloy having a composition within the homogeneity range of: V.sub.22 Ti.sub.16 Zr.sub.16 Ni.sub.27.8 Cr.sub.7 Co.sub.5.9 Mn.sub.3.1 Al.sub.2.2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-03-17 | 1995-09-16 | 1996-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-17 | 1999-09-16 | 2000-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-17 | 2003-09-16 | 2004-03-17 | $7700.00 | Window Closed / Lapsed |