US3660165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodes comprising fluorinated phosphonitrile polymer and fuel cell in combination therewith
Assignee: Leesona Corp
•
Filing: 1970-04-22
•
Granted: 1972-05-02
•
Expires: 1990-04-22
Abstract
Abstract Lightweight electrodes for use in an electrochemical device are described. In one embodiment the lightweight electrodes comprise a catalyst layer including an admixture of catalyst and a fluorinated phosphonitrile polymer. In another embodiment the hydrophobic backing layer is a continuous film of fluorinated phosphonitrile polymer with a contiguous layer of catalyst thereon. The catalyst can also be admixed and bound with particles comprising the same fluorinated phosphonitrile polymer used as the backing layer, derivatives of the polymeric material or other hydrophobic polymers such as polytetrafluoroethylene. The electrode is adapted to be disposed in an electrochemical cell with the catalytic layer in contact with the cell electrolyte.
Inventors
- 👤 Nigel I Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:30
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
18 words
The electrochemical cell of claim 1 wherein the electrocatalyst and the fluorinated phosphonitrile polymer are in intimate admixture.
Claim 2
Dependent Claim
24 words
The electrochemical cell of claim 1 wherein the fluorinated phosphonitrile is a hydrophobic membrane and the electrocatalyst is in intimate contact with said membrane.
Claim 3
Dependent Claim
22 words
The electrochemical cell of claim 1 including a hydrophobic membrane for supporting an intimate admixture of said electrocatalyst and fluorinated phosphonitrile polymer.
Claim 4
Dependent Claim
12 words
The electrochemical cell of claim 4 wherein said hydrophobic membrane is polytetrafluoroethylene.
Claim 5
Dependent Claim
15 words
The electrochemical cell of claim 4 wherein said hydrophobic membrane is a fluorinated phosphonitrile polymer.
Claim 6
Dependent Claim
15 words
The electrochemical cell of claim 1 wherein the electrochemical cell is a metal/air depolarized cell.
Claim 7
Dependent Claim
33 words
The electrochemical cell of claim 7 wherein the electrocatalyst comprises a metal taken from the group consisting of elements of groups VIII and IB of the periodic table and mixtures and alloys theReof.
Claim 8
Dependent Claim
13 words
The electrochemical cell of claim 7 wherein the anode is a porous metal.
Claim 9
Dependent Claim
13 words
The electrochemical cell of claim 1 wherein the electrolyte comprises alkali metal hydroxide.
Claim 10
Dependent Claim
22 words
The electrochemical cell of claim 2 wherein the admixture of electrocatalyst and fluorinated phosphonitrile polymer are formed in a unitary coherent structure.
Claim 11
Dependent Claim
15 words
The electrochemical cell of claim 1 wherein the fluorinated phosphonitrile polymer membrane has a formula:
Claim 12
Dependent Claim
25 words
The electrical cell of claim 12 wherein the fluorinated phosphonitrile polymer comprises recurring monomer units having the formula: (NP(OCH2R'''')2) and R'''' is a fluorinated hydrocarbon.
Claim 13
Dependent Claim
18 words
The electrochemical cell of claim 12 wherein the fluorinated phosphonitrile polymer is a copolymer comprising trifluoroethyoxy-heptafluorobutoxy side groups.
Claim 14
Dependent Claim
13 words
The electrochemical cell of claim 1 including a current collector contacting said electrocatalyst.
Claim 15
Dependent Claim
19 words
The electrochemical cell of claim 3 wherein said electrocatalyst is in intimate admixture with particles of a fluorinated hydrocarbon.
Claim 16
Dependent Claim
23 words
An improved electrode adapted to be used in an electrochemical device for the generation of electricity comprising a fluorinated phosphonitrile polymer and electrocatalyst.
Claim 17
Dependent Claim
20 words
The electrode of claim 17 including a hydrophobic membrane coated with an admixture of said electrocatalyst and fluorinated phosphonitrile polymer.
Claim 18
Dependent Claim
11 words
The electrode of claim 18 wherein the hydrophobic membrane is polytetrafluoroethylene.
Claim 19
Dependent Claim
14 words
The electrode of claim 18 wherein the hydrophobic membrane is a fluorinated phosphonitrile polymer.
Claim 20
Dependent Claim
17 words
The electrode of claim 17 characterized as an air cathode for use in metal/air depolarized electrochemical cells.
Claim 21
Dependent Claim
21 words
The electrode of claim 17 wherein the electrocatalyst and fluorinated phosphonitrile polymer are intimately admixed and formed into unitary coherent structure.
Claim 22
Dependent Claim
23 words
The electrode of claim 17 characterized as a composite electrode wherein the backing layer comprises fluorinated phosphonitrile polymer and electrocatalyst is secured thereto.
Claim 23
Dependent Claim
26 words
The electrode of claim 17 wherein the electrocatalyst comprises a metal taken from group VIII and IB of the periodic table and mixture and alloys thereof.
Claim 24
Dependent Claim
13 words
The electrode of claim 17 wherein the fluorinated phosphonitrile polymer has a formula:
Claim 25
Dependent Claim
24 words
The electrode of claim 17 wherein the fluorinated phosphonitrile polymer comprises recurring monomer units having the formula: (NP(OCH2R'''')2) wherein R'''' is a fluorinated hydrocarbon.
Claim 26
Dependent Claim
17 words
The electrode of claim 17 wherein the fluorinated phosphonitrile polymer is a copolymer comprising trifluorethoxy-heptafluorobutoxy side groups.
Claim 27
Dependent Claim
37 words
The electrode of claim 17 wherein the electrode is an air cathode and the supporting polymeric film comprising at least three recurring monomer units taken from the group consisting of (NP(OCH2CF3)2), (NP(OCH2C3F7)2) and (NP(OCH2CF3)(OCH2C3F7)) and combinations thereof.
Claim 28
Dependent Claim
16 words
The electrode of claim 17 wherein said electrocatalyst is admixed with particles of fluorinated phosphonitrile polymer.
Claim 29
Dependent Claim
12 words
The electrode of claim 17 including a current collector contacting said electrocatalyst.
Claim 30
Dependent Claim
15 words
The electrode of claim 23 wherein the electrocatalyst is intimately admixed with a fluorinated hydrocarbon.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |