US4228145A
Expired / Lapsed
US
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Hydrogen storage material
Assignee: Panasonic Holdings Corp
•
Filing: 1978-10-20
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Granted: 1980-10-14
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Expires: 1998-10-20
Abstract
Abstract An economical metallic material for storage of hydrogen constituted by an intermetallic compound which exists as a Laves phase, has a hexagonal crystal structure of the MgZn2 type, (C14 type) and in which the crystal lattice parameters a and c are in the ranges a=4.80 DIFFERENCE 5.10 (A) and c=7.88 DIFFERENCE 8.28 (A). The material of the invention permits absorption of large amounts of hydrogen and efficient desorption thereof under close to normal temperature and pressure conditions, and for reduced cost of material preferably includes as principal components manganese and at least titanium or zirconium.
Inventors
- 👤 Takaharu Gamo
- 👤 Yoshio Moriwaki
- 👤 Toshio Yamashita
- 👤 Masataro Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:44
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/0005; C01B3/001; C01B3/0018; C01B3/0031; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32; Y10; Y10S; Y10S420/00; Y10S420/90
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
41 words
The hydride of a binary alloy, which alloy is a substantially Laves phase intermetallic compound having a hexagonal MgZn 2 (C14) type crystal structure with crystal structure parameters a and c which have values in the range: a=4.80˜5.10 angstroms, c=7.88˜8.28 angstroms.
Claim 2
Dependent Claim
41 words
The hydride of a binary alloy, which alloy is a substantially Laves phase intermetallic compound having a hexagonal MgZn 2 (C14) type crystal structure with crystal structure parameters a and c which have values in the range: a=4.80˜5.10 angstroms, c=7.88˜8.28 angstroms.
Claim 3
Dependent Claim
16 words
The hydride of the binary alloy according to claim 1, which alloy comprises titanium and manganese.
Claim 4
Dependent Claim
16 words
The hydride of the binary alloy according to claim 1 which alloy comprises zirconium and manganese.
Claim 5
Independent Claim
56 words
A method for the storage of hydrogen which comprises contacting an alloy which is a substantially Laves phase intermetallic compound having a hexagonal MgZn 2 (C14) type crystal structure with crystal structure parameters a and c which have values in the range: a=4.80˜5.10 angstroms, c=7.88˜8.28 angstroms, with hydrogen, to thereby form the hydride of said alloy.
Claim 6
Independent Claim
56 words
A method for the storage of hydrogen which comprises contacting an alloy which is a substantially Laves phase intermetallic compound having a hexagonal MgZn 2 (C14) type crystal structure with crystal structure parameters a and c which have values in the range: a=4.80˜5.10 angstroms, c=7.88˜8.28 angstroms, with hydrogen, to thereby form the hydride of said alloy.
Claim 7
Dependent Claim
15 words
A method according to claim 4 wherein said hydrogen storage alloy comprises titanium and manganese.
Claim 8
Dependent Claim
15 words
A method according to claim 4 wherein said hydrogen storage alloy comprises zirconium and manganese.
Claim 9
Dependent Claim
16 words
A method according to claim 4 wherein said hydrogen storage alloy comprises titanium, zirconium and manganese.
Claim 10
Dependent Claim
32 words
A method according to claim 7 wherein said alloy is represented by the formula xTi-yZr-zMn, in which x, y and z are values indicating atomic percentages, 0<x≦60, 0<y≦60, z=40˜70, x+y=30˜60, and x+y=100.
Claim 11
Dependent Claim
18 words
A method according to claim 8 wherein said value of atomic percentage z is approximately equal to 66.7.
Claim 12
Dependent Claim
22 words
A method according to claim 7 wherein said crystal lattice parameters a and c are in the range: a=4.84˜4.96 (A) c=7.95˜8.16 (A)
Claim 13
Dependent Claim
17 words
A method according to claim 4 wherein said hydrogen storage alloy comprises titanium, zirconium, manganese and molybdenum.
Claim 14
Dependent Claim
40 words
A method according to claim 11 wherein said hydrogen storage alloy is represented by the formula Ti x-y Zr y Mn 2-z Mo z , in which x, y and z are values indicating atomic ratios x=1.0˜1.5, 0<y≦1.0 and 0<z≦1.0.
Claim 15
Dependent Claim
16 words
A method according to claim 12 wherein said atomic ratio value x is equal to 1.0.
Claim 16
Dependent Claim
21 words
A method according to claim 12 wherein said atomic ratio values x, y and z are substantially x=1.0, y=0.2˜0.3 and z=0.1˜0.4.
Claim 17
Dependent Claim
22 words
A method according to claim 14 wherein said atomic ratio values y and z substantially have the values 0.3 and 0.1, respectively.
Claim 18
Dependent Claim
22 words
A method according to claim 14 wherein said atomic ratio values y and z substantially have the values 0.2 and 0.3, respectively.
Claim 19
Dependent Claim
22 words
A method according to claim 11 wherein said crystal lattic parameters a and c are in the ranges: a=4.85˜4.96 (A) c=7.95˜8.18 (A)
Claim 20
Dependent Claim
17 words
A method according to claim 4 wherein said hydrogen storage alloy comprises titanium, zirconium, manganese and copper.
Claim 21
Dependent Claim
40 words
A method according to claim 18 wherein said hydrogen storage alloy is representated by the formula Ti x-y Zr y Mn 2-z Cu z , in which x, y and z are values indicating atomic ratios, x=1.0≈1.5, 0<y≦1.0 and 0<z≦1.5.
Claim 22
Dependent Claim
15 words
A method according to claim 19 wherein said atomic ratio value x substantially is 1.0.
Claim 23
Dependent Claim
17 words
A method according to claim 19 wherein sait atomic ratio values are substantially x=1.0, y=0.2˜0.6, and z=0.05˜0.5.
Claim 24
Dependent Claim
22 words
A method according to claim 21 wherein said atomic ratio values y and z are substantially equal to 0.2 and 0.5, respectively.
Claim 25
Dependent Claim
22 words
A method according to claim 21 wherein said atomic ratio values y and z are substantially equal to 0.4 and 0.1, respectively.
Claim 26
Dependent Claim
22 words
A method according to claim 18 wherein said crystal lattice parameters a and c are in the ranges: a=4.85˜4.96 (A) c=7.95˜8.18 (A).
References Cited (Backward Citations)
US2267298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |