EP0100548A2
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Gas diffusion electrode material
Assignee: AGC Inc
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Filing: 1983-08-01
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Granted: —
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Expires: 2003-08-01
Abstract
Abstract A gas diffusion electrode material which comprises a continuously micro-porous electrically insulating material and at least partially graphitized carbon black powder uniformly incorporated in the insulating material.
Inventors
- 👤 Yoshio Oda
- 👤 Takeshi Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 01:55
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/043; C25B11/044; H; H01; H01M; H01M4/00; H01M4/86; H01M4/96; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
28 words
L. A gas diffusion electrode material which comprises a continuously nicro-porous electrically insulating material and at least partially graphitized carbon black powder uniformly incorporated in the insulating material.
Claim 2
Dependent Claim
37 words
The gas diffusion electrode material according to Claim 1, wherein the graphitized carbon black powder is carbon black graphitized by heat treatment at a temperature of from 1,200 to 2, 500°C for from 5 to 60 minutes.
Claim 3
Dependent Claim
23 words
The gas diffusion electrode material according to Claim 1, wherein the graphitized carbon black powder is graphitized carbon black subjected to etching treatment.
Claim 4
Dependent Claim
22 words
The gas diffusion electrode material according to Claim 3, wherein the etching treatment is conducted by oxidation treatment of graphitized carbon black.
Claim 5
Dependent Claim
38 words
The gas diffusion electrode material according to Claim 4, wherein the oxidation treatment is conducted by heat treatment in an oxygen atmosphere or by treatment with an oxidizing agent such as nitric acid, sulfuric acid or a permanganate.
Claim 6
Dependent Claim
21 words
The gas diffusion electrode material according to Claim 1, wherein the continuously micro-porous electrically insulating material is made of a polytetrafluoroethylene.
Claim 7
Dependent Claim
56 words
The gas diffusion electrode material according to Claim 1, wherein the continuously micro-porous electrically insulating material is composed of a numerous fine nodes of a polytetrafluoroethylene and fine fibers of a polytetrafluoroethylene extending from the nodes and three dimensionally connecting the nodes to one another, the nodes being partially in contact or connected with one another.
Claim 8
Dependent Claim
24 words
The gas diffusion electrode material according to Claim 1, wherein the graphitized carbon black powder has a particle size of at most 1 µm.
Claim 9
Dependent Claim
21 words
The gas diffusion electrode material according to Claim 1, wherein the graphitized carbon black is incorporated in an amount of from
Claim 10
Dependent Claim
23 words
7 to 90% by weight based on the total weight of the continuously micro-porous electrically insulating material and the graphitized carbon black powder.
References Cited (Backward Citations)
No citation records indexed.
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