EP0241432A2
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EP
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Gas permeable electrode
Assignee: Tanaka Precious Metal Technologies Co Ltd
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Filing: 1987-03-05
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Granted: —
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Expires: 2007-03-05
Abstract
Abstract Disclosed herein is a gas permeable electrode which comprises a gas permeable layer and a reaction layer, the reaction layer comprising hydrophobic portions and hydrophilic portions. Electrolyte penetrates into the reaction layer and does not penetrate into the gas permeable layer, and only the gas produced on the electrode and the gas supplied penetrate into the gas permeable layer. The gas can be released from the rear side of the electrode and the reaction surface thereof never be covered with the gas.
Inventors
- 👤 Masahiro Watanabe
- 👤 Satoshi Motoo
- 👤 Nagakazu Furuya
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 02:06
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8803; H01M4/8807; C; C25; C25B; C25B11/00; C25B11/02; C25B11/03; C25B11/031; C25B11/032; C25C; C25C1/00; C25C1/16; H01M4/8825; H01M4/8846; H01M4/885; H01M8/00; H01M8/08; H01M8/10; H01M8/1007; H01M8/1009; H01M4/8878; H01M4/8896; H01M8/1004; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
73 words
A gas permeable electrode which comprises a gas permeable layer comprising hydrophobic resins and an electrically conductive porous body or electrically conductive fine powders, and a reaction layer comprising a semi-hydrophobic porous body prepared by the coagulation of hydrophobic portions and hydrophilic portions, the both layers being attached to each other, the electrolyte impregnating the hydrophilic portions of the reaction layer to be held therein, and the hydrophobic portions thereof constituting gas passages.
Claim 2
Dependent Claim
73 words
A gas permeable electrode which comprises a gas permeable layer comprising hydrophobic resins and an electrically conductive porous body or electrically conductive fine powders, and a reaction layer comprising a semi-hydrophobic porous body prepared by the coagulation of hydrophobic portions and hydrophilic portions, the both layers being attached to each other, the electrolyte impregnating the hydrophilic portions of the reaction layer to be held therein, and the hydrophobic portions thereof constituting gas passages.
Claim 3
Dependent Claim
77 words
A gas permeable electrode which comprises a gas permeable layer comprising hydrophobic resins and an electrically conductive porous body or electrically conductive fine powders, and a reaction layer comprising a semi-hydrophobic porous body prepared by the coagulation of hydrophobic portions and hydrophilic portions supported with catalysts therein, the both layers being attached to each other, the electrolyte impregnating the hydrophilic portions of the reaction layer to be held therein, and the hydrophobic portions thereof constituting gas passages.
Claim 4
Dependent Claim
77 words
A gas permeable electrode which comprises a gas permeable layer comprising hydrophobic resins and an electrically conductive porous body or electrically conductive fine powders, and a reaction layer comprising a semi-hydrophobic porous body prepared by the coagulation of hydrophobic portions and hydrophilic portions supported with catalysts therein, the both layers being attached to each other, the electrolyte impregnating the hydrophilic portions of the reaction layer to be held therein, and the hydrophobic portions thereof constituting gas passages.
Claim 5
Dependent Claim
22 words
In the gas permeable electrode as claimed in Claim 2, wherein an electricity collecting member is attached to the gas permeable layer.
Claim 6
Dependent Claim
39 words
In the gas permeable electrode as claimed in Claim 2, wherein the hydrophobic portions comprise a plurality of thin hydrophobic fibers and the hydrophilic portions comprise a plurality of thin hydrophilic fibers; and the respective fibers are alternatively superimposed.
Claim 7
Dependent Claim
27 words
In the gas permeable electrode as claimed in Claim 4, wherein the respective fibers which are spirally wound are alternatively super- imposed in the direction of radius.
Claim 8
Dependent Claim
25 words
In the gas permeable electrode as claimed in Claim 2, wherein the reaction layer comprises finely divided powders which comprises hydrophobic portions and hydrophilic portions.
Claim 9
Dependent Claim
44 words
In the gas permeable electrode as claimed in Claim 2, wherein the reaction layer contains mixed portions intervening between the hydrophobic portions and the hydrophilic portions, the characteristics of the mixed portions being intermediate between those of the hydrophobic portions and the hydrophilic portions.
Claim 10
Dependent Claim
49 words
In the gas permeable electrode as claimed in Claim 2, wherein the hydrophobic portions and the hydrophilic portions of the reaction layer which are in the form of fibers are randomly dispersed in the direction of thichness, and the both ends of which are exposed to the both sides.
Claim 11
Dependent Claim
22 words
In the gas permeable electrode as claimed in Claim 2, wherein the reaction layer contains ion exchange resins other than the catalysts.
Claim 12
Dependent Claim
25 words
In the gas permeable electrode as claimed in Claim 2, wherein a reinforcing sheet is incorporated in the gas permeable layer and/or the reaction layer.
References Cited (Backward Citations)
No citation records indexed.
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