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US4004943A
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Rechargeable electrochemical cell
Assignee: US Philips Corp
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Filing: 1975-08-20
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Granted: 1977-01-25
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Expires: 1995-08-20
Abstract
Abstract Rechargeable electrochemical cell an electrode of which consists of a lanthanum nickel compound while the counterelectrode consists of a material which is capable of reversibly taking up and giving off an electron and a proton, such as nickel hydroxide or manganese dioxide.
Inventors
- 👤 Pieter Abraham Boter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:25
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/34; H01M10/345; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M4/383; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
A rechargeable electrochemical cell having an electrode which consists of La 1 -y R y Ni 5 -z M z H x , where y = 0 to 1, z = 0 to 1, x = 0 to 7, R is a metal selected from the group consisting of the rare earth metals, calcium and thorium, and M is a metal selected from the group consisting of cobalt, copper and iron, in the presence of iron z < 0.2, a counterelectrode consisting of a material which is capable of reversibly taking up and giving off a proton and an electron and an electrolyte.
Claim 2
Dependent Claim
103 words
A rechargeable electrochemical cell having an electrode which consists of La 1 -y R y Ni 5 -z M z H x , where y = 0 to 1, z = 0 to 1, x = 0 to 7, R is a metal selected from the group consisting of the rare earth metals, calcium and thorium, and M is a metal selected from the group consisting of cobalt, copper and iron, in the presence of iron z < 0.2, a counterelectrode consisting of a material which is capable of reversibly taking up and giving off a proton and an electron and an electrolyte.
Claim 3
Dependent Claim
40 words
The rechargeable electrochemical cell of claim 1, wherein an electrode made of La 1 -y R y Ni 5 -z M z H x is used the plateau pressure of which at 20° C is not greater than, 1 atmosphere.
Claim 4
Dependent Claim
29 words
The rechargeable electrochemical cell of claim 2, wherein the electrode consists of LaNi 4 CuH x , where depending upon the charge condition x lies between 0 and 4.8.
Claim 5
Dependent Claim
25 words
The rechargeable electrochemical cell of claim 1 having a counterelectrode made of a compound selected from the group consisting of nickel hydroxide and manganese dioxide.
References Cited (Backward Citations)
US3874928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |