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Patent US3981749A successfully refreshed from Google Patents.
US3981749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas diffusion electrode for a battery
Assignee: Panasonic Holdings Corp
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Filing: 1973-09-12
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Granted: 1976-09-21
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Expires: 1993-09-12
Abstract
Abstract This specification discloses a gas diffusion electrode for a battery, wherein a layer which is formed of a binding agent and substance such as graphite, nickel oxide, aluminum oxide or the like so as to represent no catalytic action with respect to a fuel is provided on the electrolyte side of a high-porosity sintered member of which the constituent is nickel, thereby preventing a decrease in the electrode potential due to the active fuel and in the utilization rate of such fuel, while at the same time restraining permeation of a gas supplied to the electrode into the electrolyte and leakage of such electrolyte into the gas.
Inventors
- 👤 Masataro Fukuda
- 👤 Tsutomu Iwaki
- 👤 Hiroshi Kawano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:50
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
91 words
A battery comprising: a gas diffusion electrode, said electrode comprising: a high porosity sintered metallic body, said body having nickel as its main constituent, a first layer affixed to one side of said sintered body, said first layer consisting essentially of: a powder-like, alkali-resistive material which is catalytically inert with respect to fuel, and a synthetic resin binder agent; an electrolyte in contact with said first layer of said gas diffusion electrode; and means for supplying a gas on the other side of the sintered body of said gas diffusion electrode.
Claim 2
Dependent Claim
91 words
A battery comprising: a gas diffusion electrode, said electrode comprising: a high porosity sintered metallic body, said body having nickel as its main constituent, a first layer affixed to one side of said sintered body, said first layer consisting essentially of: a powder-like, alkali-resistive material which is catalytically inert with respect to fuel, and a synthetic resin binder agent; an electrolyte in contact with said first layer of said gas diffusion electrode; and means for supplying a gas on the other side of the sintered body of said gas diffusion electrode.
Claim 3
Dependent Claim
35 words
The battery of claim 1 wherein said first layer consists essentially of a synthetic resin binder agent and a powder selected from the group consisting of graphite powder, nickel oxide powder and aluminum oxide powder.
Claim 4
Dependent Claim
45 words
The battery of claim 1 which further comprises a second layer interposed between said sintered body and the path of gas from said gas supply means, said second layer consisting essentially of a water-repellent fluorocarbon resin bonded to the other side of said sintered body.
Claim 5
Dependent Claim
32 words
The battery of claim 2 wherein the powder selected from the group consisting of graphite powder, nickel oxide powder and aluminium oxide powder has a grain diameter not greater than 40 microns.
Claim 6
Dependent Claim
36 words
The battery of claim 2 wherein said first layer consists of 10-40 mg/cm 2 of said powder and 10-40 weight per cent of said synthetic resin binder agent with respect to the weight of said powder.
Claim 7
Dependent Claim
45 words
The battery of claim 3 which further comprises a second layer interposed between said sintered body and the path of gas from said gas supply means, said second layer consisting essentially of a water-repellent fluorocarbon resin bonded to the other side of said sintered body.
References Cited (Backward Citations)
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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) | 1979-09-21 | 1980-03-22 | 1980-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-21 | 1984-03-22 | 1984-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-21 | 1988-03-22 | 1988-09-21 | $7700.00 | Window Closed / Lapsed |