EP0031660B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electrolysis apparatus using a diaphragm of a solid polymer electrolyte, and a method for the production of the same
Assignee: De Nora Permelec Ltd
•
Filing: 1980-12-11
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Granted: 1985-03-27
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Expires: 2000-12-11
Abstract
No abstract record available.
Inventors
- 👤 Asano Hiroshi
- 👤 Shimamune Takayuki
- 👤 Goto Toshiki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 21:41
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: 10
Claim 1
Independent Claim
116 words
Electrolysis apparatus comprising a solid polymer electrolyte which is a diaphragm formed of an ion exchange membrane, and an anode electrode structure and a cathode electrode structure located on opposite sides respectively of said diaphragm, at least one of said electrode structures (22, 23) including a gas-permeable electrically conductive substrate (24) and a film-like porous electrode catalyst layer (25) bonded integrally thereto, characterised in that an anti- corrosive porous electrically conductive coating (27) having a lower electrochemical activity than the electrode catalyst layer (25) is provided either on said porous electrode catalyst layer (25) or on said diaphragm (21) and is in intimate contact with but not bonded to the diaphragm (21) or layer (25) respectively.
Claim 2
Dependent Claim
116 words
Electrolysis apparatus comprising a solid polymer electrolyte which is a diaphragm formed of an ion exchange membrane, and an anode electrode structure and a cathode electrode structure located on opposite sides respectively of said diaphragm, at least one of said electrode structures (22, 23) including a gas-permeable electrically conductive substrate (24) and a film-like porous electrode catalyst layer (25) bonded integrally thereto, characterised in that an anti- corrosive porous electrically conductive coating (27) having a lower electrochemical activity than the electrode catalyst layer (25) is provided either on said porous electrode catalyst layer (25) or on said diaphragm (21) and is in intimate contact with but not bonded to the diaphragm (21) or layer (25) respectively.
Claim 3
Dependent Claim
26 words
Electrolysis apparatus as claimed in claim 1, characterised in that the electrically conductive substrate (24) is Ti0 2 _ X where 0 < x < 0.5.
Claim 4
Dependent Claim
27 words
Electrolysis apparatus as claimed in claim 1, characterised in that said gas-permeable electrically conductive substrate (24) has an opening size of not more than about 5 mm.
Claim 5
Dependent Claim
30 words
Electrolysis apparatus as claimed in claim 1, characterised by additionally including an electric current supply reinforcing member (26) having large pores integrally provided at the gas-permeable electrically conductive substrate (24).
Claim 6
Dependent Claim
27 words
Electrolysis apparatus as claimed in claim 1, characterised in that the electrically conductive coating material (27) is platinum or an electrically conductive oxide of a valve metal.
Claim 7
Dependent Claim
87 words
A method of producing an electrolysis apparatus according to claim 1, comprising the steps of forming the gas-permeable electrically conductive substrate (24), and bonding the film-like porous electrode catalyst layer (25) integrally to said gas-permeable electrically conductive substrate (24), characterised by providing the anti- corrosive porous electrically conductive coating (27) on the surface of said film-like porous electrode catalyst layer (25) or on the surface of the diaphragm (21) and then bringing said coating (27) into intimate contact with said diaphragm (21) or said layer (25) respectively.
Claim 8
Dependent Claim
39 words
A method as claimed in claim 6, characterised in that the electrode catalyst layer (25) is formed on the electrically conductive substrate (24) by thermal decomposition, plating, immersion or coating followed by baking, spraying hot pressing or vacuum deposition.
Claim 9
Dependent Claim
44 words
A method as claimed in claim 6, characterised by additionally including the step of providing a substrate for the film-like porous electrode catalyst layer (25) on the gas-permeable electrically conductive substrate (24), and then coating an electrode catalyst material on said catalyst layer substrate.
Claim 10
Dependent Claim
33 words
A method as claimed in claim 8, characterised in that the catalyst layer substrate is formed on the electrically conductive substrate by welding, spraying, partial leaching out of an alloy coating or sintering.
References Cited (Backward Citations)
No citation records indexed.
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