Patent US4457822A successfully refreshed from Google Patents.
US4457822A
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Electrolysis apparatus using a diaphragm of a solid polymer electrolyte
Assignee: De Nora Permelec Ltd
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Filing: 1980-12-18
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Granted: 1984-07-03
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Expires: 2000-12-18
Abstract
Abstract An electrolysis apparatus comprising a diaphragm of a solid polymer electrolyte, and an anode electrode structure and a cathode electrode structure located on both sides of the diaphragm, at least one of the electrode structures intimately contacting the surface of said diaphragm, the intimately contacting electrode structure comprising a gas-permeable electrically conductive substrate and a film-like porous electrode catalyst layer bonded integrally thereto and a method for producing such.
Inventors
- 👤 Hiroshi Asano
- 👤 Takayuki Shimamune
- 👤 Toshiki Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:18
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/10; H01M8/1004; C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25B11/093; C25B9/00; C25B9/17; C25B9/19; C25B9/23; H01M8/1016; H01M8/1018; H01M8/102; H01M8/1023; H01M8/1039; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
An electrolysis apparatus comprising a diaphragm of a solid polymer electrolyte wherein the solid polymer electrolyte is an ion exchange membrane, and an anode electrode structure and a cathode electrode structure located on either side of the diaphragm, at least one of the electrode structures intimately contacting the surface of the diaphragm but not bonded thereto, wherein the intimately contacting electrode structure comprises a gas-permeable electrically conductive substrate and a film-like porous electrode catalyst layer bonded integrally thereto, and additionally including a porous electrically conductive coating with substantially non-catalytic activity provided in the interface between the porous electrode catalyst layer and the solid polymer electrolyte diaphragm.
Claim 2
Dependent Claim
106 words
An electrolysis apparatus comprising a diaphragm of a solid polymer electrolyte wherein the solid polymer electrolyte is an ion exchange membrane, and an anode electrode structure and a cathode electrode structure located on either side of the diaphragm, at least one of the electrode structures intimately contacting the surface of the diaphragm but not bonded thereto, wherein the intimately contacting electrode structure comprises a gas-permeable electrically conductive substrate and a film-like porous electrode catalyst layer bonded integrally thereto, and additionally including a porous electrically conductive coating with substantially non-catalytic activity provided in the interface between the porous electrode catalyst layer and the solid polymer electrolyte diaphragm.
Claim 3
Dependent Claim
20 words
The electrolysis apparatus of claim 1, wherein the intimately contacting electrode structure is an anode structure or a cathode structure.
Claim 4
Dependent Claim
20 words
The electrolysis apparatus of claim 1, wherein the intimately contacting electrode structures are an anode structure and a cathode structure.
Claim 5
Dependent Claim
55 words
The electrolysis apparatus of claim 1 wherein the gas-permeable electrically conductive substrate is a material selected from the group consisting of titanium, tantalum, niobium, zirconium, iron, nickel, and an alloy thereof and an electrically conductive oxide of a valve metal, and wherein the electrically conductive oxide of the valve metal is TiO 2-x where 0<x<0.5.
Claim 6
Dependent Claim
67 words
The electrolysis apparatus of claim 1, wherein the electrode catalyst is selected from the group consisting of ruthenium, iridium, platinum, palladium and rhodium, an alloy of these platinum-group metals, an oxide of these platinum-group metals, mixtures or oxides of these platinum-group metals with oxides of valve metals, iron, nickel, valve metals, oxides of valve metals, metal borides, metal carbides and metal nitrides, either alone or in combination.
Claim 7
Dependent Claim
23 words
The electrolysis apparatus of claim 1, wherein said gas-permeable electrically conductive substrate has an opening size of not more than about 5 mm.
Claim 8
Dependent Claim
25 words
The electrolysis apparatus of claim 1, additionally including an electric current supply reinforcing member having large pores integrally provided at the gas-permeable electrically conductive substrate.
Claim 9
Dependent Claim
29 words
The electrolysis apparatus of claim 1, wherein the electrically conductive coating material is selected from the group consisting of platinum and an electrically conductive oxide of a valve metal.
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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) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |