US4350745A
Expired / Lapsed
US
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Electrochemical cells having hydrogen gas absorbing agent
Assignee: Duracell Inc USA
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Filing: 1980-12-29
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Granted: 1982-09-21
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Expires: 2000-12-29
Abstract
Abstract An agent which absorbs hydrogen gas for electrochemical cells is made from an oxide of manganese and nickel, cobalt or iron. At temperatures above about 40° C., the oxide of manganese can be replaced by lead oxide. Hydrophobic binders can be added to the agent or the agent can be microencapsulated in water-impermeable but hydrogen-gas-permeable materials. The agent is preferably added to the cell in the form of small agglomerates or microcapsules.
Inventors
- 👤 Frank E. Parsen
- 👤 Thomas T. Yatabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:50
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/52; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
56 words
An electrochemical cell comprising an anode, a cathode, an electrolyte, and an agent for absorbing hydrogen gas, all operatively associated, said agent comprising a mixture of a member of the group consisting of an oxide of manganese and an oxide of lead; and a powered metal selected from the group consisting of nickel, cobalt and iron.
Claim 2
Dependent Claim
56 words
An electrochemical cell comprising an anode, a cathode, an electrolyte, and an agent for absorbing hydrogen gas, all operatively associated, said agent comprising a mixture of a member of the group consisting of an oxide of manganese and an oxide of lead; and a powered metal selected from the group consisting of nickel, cobalt and iron.
Claim 3
Dependent Claim
30 words
The cell of claim 1 wherein said agent comprises a mixture of an oxide of manganese and a powdered metal selected from the group consisting of nickel, cobalt, and iron.
Claim 4
Dependent Claim
26 words
The cell of claim 2 wherein the oxide of manganese is selected from the group consisting of manganese dioxide (MnO 2 ) and manganese hydroxide (MnOOH).
Claim 5
Dependent Claim
10 words
The cell of claim 2 wherein the metal comprises nickel.
Claim 6
Dependent Claim
13 words
The cell of claim 2 wherein the agent further comprises a hydrophobic material.
Claim 7
Dependent Claim
25 words
The cell of claim 5 wherein the hydrophobic material comprises from about 0.05 percent to about 5 percent by weight of the mixture of polytetrafluoroethylene.
Claim 8
Dependent Claim
17 words
The cell of claim 2 wherein the agent is in the form of a multiplicity of agglomerates.
Claim 9
Dependent Claim
22 words
THe cell of claim 2 wherein the metal comprises an effective amount up to about 25 percent by weight of the mixture.
Claim 10
Dependent Claim
18 words
The cell of claim 2 and further comprising a hydrogen gas permeable, liquid impermeable material encapsulating the mixture.
Claim 11
Dependent Claim
10 words
The cell of claim 2 wherein said anode comprises zinc.
Claim 12
Dependent Claim
15 words
The cell of claim 2 wherein said anode consists essentially of zinc without amalgamation thereof.
Claim 13
Dependent Claim
15 words
The cell of claim 7 wherein the agglomerates have an average size of 2.2 millimeters.
Claim 14
Dependent Claim
44 words
The cell of claim 2 wherein the anode comprises zinc, the electrolyte comprises an aqueous solution of potassium hydroxide, the cathode comprises manganese dioxide and the agent comprises a mixture of manganese dioxide and powdered nickel, in the form of a plurality of agglomerates.
Claim 15
Dependent Claim
38 words
The cell of claim 1 wherein said agent is operable at temperatures above about 40° C. and comprises a mixture of a lead oxide and a powdered metal selected from the group consisting of nickel, cobalt and iron.
Claim 16
Dependent Claim
10 words
The cell of claim 14 wherein the metal comprises nickel.
Claim 17
Dependent Claim
15 words
The cell of claim 14 wherein the lead oxide comprises lead dioxide (PbO 2 ).
Claim 18
Dependent Claim
13 words
The cell of claim 14 wherein the mixture further comprises a hydrophobic material.
Claim 19
Dependent Claim
18 words
The cell of claim 14 and further comprising a hydrogen gas permeable, liquid impermeable material encapsulating the mixture.
Claim 20
Dependent Claim
44 words
The cell of claim 14 wherein the anode comprises zinc, the electrolyte comprises an aqueous solution of potassium hydroxide, the cathode comprises manganese dioxide, and the agent comprise a mixture of lead dioxide, and powdered nickel in the form of a plurality of agglomerates.
Claim 21
Dependent Claim
10 words
The cell of claim 14 wherein said anode comprises zinc.
Claim 22
Dependent Claim
15 words
The cell of claim 14 wherein said anode consists essentially of zinc without amalgamation thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-20 | 1986-03-22 | 1986-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-20 | 1990-03-22 | 1990-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-20 | 1994-03-22 | 1994-09-21 | $7700.00 | Window Closed / Lapsed |