US3881960A
Expired / Lapsed
US
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Electrode for galvanic cells
Assignee: Deutsche Automobil GmbH
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Filing: 1974-02-19
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Granted: 1975-05-06
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Expires: 1994-02-19
Abstract
Abstract A hydrogen storage electrode having a body portion formed of particles of an active, hydrogen-storing material, which particles are enveloped by and in surface contact with TiNi3. This electrode may be formed by admixing the TiNi3 in powdered form with the active material in powder form and thereafter press-molding the mixture and/or sintering the mixture.
Inventors
- 👤 Friedrich Haschka
- 👤 Rolf Linkohr
- 👤 Heinz G Plust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:39
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/242; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
41 words
A HYDROGEN STORAGE ELECTRODE COMPRISING A BODY FORMED OF PARTICLES OF AN ACTIVE, HYDROGEN-STROING MATERIAL, SAID PARTICLES BEING ENVELOPED BY AND IN SURFACE CONTACT WITH TINI3 WHICH IS INACTIVE WITH RESPECT TO THE HYDROGEN STORAGE BUT HAS A HIGH HYDROGEN PERMEATION.
Claim 2
Dependent Claim
41 words
A HYDROGEN STORAGE ELECTRODE COMPRISING A BODY FORMED OF PARTICLES OF AN ACTIVE, HYDROGEN-STROING MATERIAL, SAID PARTICLES BEING ENVELOPED BY AND IN SURFACE CONTACT WITH TINI3 WHICH IS INACTIVE WITH RESPECT TO THE HYDROGEN STORAGE BUT HAS A HIGH HYDROGEN PERMEATION.
Claim 3
Dependent Claim
38 words
The electrode according to claim 1, wherein said particles of active, hydrogen-storing material have a size of from 5 to 100 Mu and TiNi3 having a particle size of 1-500 Mu , is used to form said body.
Claim 4
Dependent Claim
18 words
The electrode according to claim 2, wherein the TiNi3 particles have a size up to 80 Mu .
Claim 5
Dependent Claim
44 words
The electrode according to claim 1, wherein the active material having a high hydrogen storage ability is a TiNi alloy having a titanium content in the range from the phase Ti2Ni to TiNi with a particle size of from 5 to 500 Mu .
Claim 6
Dependent Claim
19 words
The electrode according to claim 4, wherein the TiNi alloy has a particle size up to 100 Mu .
Claim 7
Dependent Claim
19 words
The electrode according to claim 1, wherein the active material having a high hydrogen storage ability, comprises lanthanum alloys.
Claim 8
Dependent Claim
14 words
The electrode according to claim 6, wherein the lanthanum alloys include LaCo5 and LaNi5.
Claim 9
Dependent Claim
25 words
The electrode according to claim 1, wherein grains of the active material are coated with a nickel layer having a thickness of 1-10 Mu .
Claim 10
Dependent Claim
26 words
The electrode according to claim 1, wherein an expanded copper metal is provided in the electrode as the current conductor and as an additional strengthening means.
Claim 11
Dependent Claim
36 words
A process for the production of the hydrogen storage electrode which comprises coating particles of a powder of a hydrogen-storing active material with a layer of TiNi3 and forming the resulting coated powder into an electrode.
Claim 12
Dependent Claim
36 words
A process for the production of the hydrogen storage electrode which comprises coating particles of a powder of a hydrogen-storing active material with a layer of TiNi3 and forming the resulting coated powder into an electrode.
Claim 13
Dependent Claim
37 words
The process according to claim 10, wherein active material and the TiNi3 are mixed in a weight ratio of 1:0.05 to 1:1.2,, preferably 1:0.25, and pressed into a molded article, and are therafter compacted by hot pressing.
Claim 14
Dependent Claim
49 words
The process according to claim 10, wherein the active material and the TiNi3 are mixed in a weight ratio of 1:0.05 to 1.2, preferably 1:0.25, under mechanical pressure during a period of 15 to 150 minutes and pressed into a molded article, and are thereafter compacted by hot pressing.
Claim 15
Dependent Claim
28 words
The process according to claim 11, wherein the initial pressing step is conducted under a pressure of 0.5 to 10 tons/cm2 and preferably a pressure of 6 tons/cm2.
Claim 16
Dependent Claim
36 words
The process according to claim 11, wherein the hot pressing step takes place under an inert gas and with 2-8 tons/cm2 at a temperature of 350*-600* C. during a period of 0.1-20 minutes, preferably 5 minutes.
Claim 17
Dependent Claim
40 words
The process according to claim 10, wherein the particles of the active material are coated with a nickel layer deposited by the thermal dissociation of nickel carbonyl in the presence of inert gases onto the particles of the active material.
Claim 18
Dependent Claim
38 words
The process according to claim 12, wherein the coated active material is pressed into a molded article, and then maintained at a temperature of 600*-900* C. during a time period of 1 to 30 minutes, preferably 5 minutes.
Claim 19
Dependent Claim
43 words
In a galvanic cell having a hydrogen storage electrode with an alkaline electrolyte, the improvement which comprises a hydrogen storage electrode comprising a body formed of particles of an active hydrogen-storing material, said particles being enveloped by and in surface contact with TiNi3.
Claim 20
Dependent Claim
43 words
In a galvanic cell having a hydrogen storage electrode with an alkaline electrolyte, the improvement which comprises a hydrogen storage electrode comprising a body formed of particles of an active hydrogen-storing material, said particles being enveloped by and in surface contact with TiNi3.
References Cited (Backward Citations)
US3423248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |