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US4141801A
Expired / Lapsed
US
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Fuel cell anode electrode, method of making the fuel cell anode electrode, and fuel cell containing the fuel cell anode electrode
Assignee: United States Department of the Army
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Filing: 1977-12-15
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Granted: 1979-02-27
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Expires: 1997-12-15
Abstract
Abstract A fuel cell anode electrode for use in fuel cells utilizing fuel electrol mixtures of methanol in potassium hydroxide electrolyte and ethylene glycol in potassium hydroxide electrolyte is made by pressing a paste mix of noble metal powder, graphite, and teflon onto a screen current collector, drying the electrode so formed, cathodically charging the electrode at a current density of about 21/2 to 10 mA/cm 2 for about 2 to about 6 minutes to deposit lead through electrolysis using a saturated solution of lead chloride, anodically charging the electrode for about 2 to about 12 minutes to oxidize the lead to lead dioxide, washing the electrode with distilled water, and drying the electrode.
Inventors
- 👤 John Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:28
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
Method of making a fuel cell anode electrode including the steps of: (a) pressing a paste mix of noble metal powder, graphite powder and teflon onto a screen current collector to form an electrode, (b) drying the electrode, (c) cathodically charging the electrode at a current density of about 2.5 to about 10 mA/cm 2 for about 2 to about 6 minutes to deposit lead through electrolysis using a saturated solution of lead chloride, (d) anodically charging the electrode for about 2 to about 12 minutes to oxidize the lead to lead dioxide, and (e) washing the electrode with distilled water and then drying.
Claim 2
Dependent Claim
104 words
Method of making a fuel cell anode electrode including the steps of: (a) pressing a paste mix of noble metal powder, graphite powder and teflon onto a screen current collector to form an electrode, (b) drying the electrode, (c) cathodically charging the electrode at a current density of about 2.5 to about 10 mA/cm 2 for about 2 to about 6 minutes to deposit lead through electrolysis using a saturated solution of lead chloride, (d) anodically charging the electrode for about 2 to about 12 minutes to oxidize the lead to lead dioxide, and (e) washing the electrode with distilled water and then drying.
Claim 3
Dependent Claim
51 words
Method according to claim 1 wherein the noble metal is selected from the group consisting of platinum black, palladium black, combinations of platinum black and palladium black, platinum black with traces of ruthenium, palladium black with traces of ruthenium, and combinations of platinum black and palladium black with traces of ruthenium.
Claim 4
Dependent Claim
12 words
Method according to claim 2 wherein the noble metal is platinum black.
Claim 5
Dependent Claim
12 words
Method according to claim 2 wherein the noble metal is palladium black.
Claim 6
Dependent Claim
17 words
Method according to claim 2 wherein the noble metal is combinations of platinum black and palladium black.
Claim 7
Dependent Claim
16 words
Method according to claim 2 wherein the noble metal is platinum black with traces of ruthenium.
Claim 8
Dependent Claim
16 words
Method according to claim 2 wherein the noble metal is palladium black with traces of ruthenium.
Claim 9
Dependent Claim
21 words
Method according to claim 2 wherein the noble metal is combinations of platinum black and palladium black with traces of ruthenium.
Claim 10
Dependent Claim
113 words
Method of making a fuel cell anode electrode including the steps of: (a) pressing a paste mix of platinum black powder, graphite powder and teflon onto a nickel screen to form an electrode, (b) drying the electrode for about four hours at about 90° C, (c) cathodically charging the electrode at a current density of about 6.5 mA/cm 2 for about six minutes to deposit lead on the electrode through electrolysis using a saturated solution of lead chloride, (d) anodically charging the electrode for about 12 minutes at 0.5A to oxidize the lead to lead dioxide, and (e) washing the electrode with distilled water and drying in an oven at about 90° C.
Claim 11
Dependent Claim
113 words
Method of making a fuel cell anode electrode including the steps of: (a) pressing a paste mix of platinum black powder, graphite powder and teflon onto a nickel screen to form an electrode, (b) drying the electrode for about four hours at about 90° C, (c) cathodically charging the electrode at a current density of about 6.5 mA/cm 2 for about six minutes to deposit lead on the electrode through electrolysis using a saturated solution of lead chloride, (d) anodically charging the electrode for about 12 minutes at 0.5A to oxidize the lead to lead dioxide, and (e) washing the electrode with distilled water and drying in an oven at about 90° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |