US4847173A
Expired / Lapsed
US
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Electrode for fuel cell
Assignee: Mitsubishi Electric Corp
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Filing: 1987-12-30
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Granted: 1989-07-11
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Expires: 2007-12-30
Abstract
Abstract An electrode for fuel cell which is constructed with an electrode base, a catalyst layer, and a matrix layer, wherein one or whole part of the catalyst layer and one or whole part of the matrix layer are formed in a porous sheet in juxtaposed relationship.
Inventors
- 👤 Tatsuo Mitsunaga
- 👤 Hideaki Miyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:40
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
An electrode for fuel cell, which comprises in combination: an electrode base, a catalyst layer, and a matrix layer, one part or entire part of said catalyst layer and one part or entire part of said matrix layer being formed in a porous sheet in contiguous relationship, wherein said catalyst layer is composed of a catalyst filled layer formed by filling said porous sheet with catalyst powder and a binding agent from one surface side thereof, and a catalyst adhered layer formed by adhesion of the catalyst powder and the binding agent on the surface of said catalyst filled layer; and said matrix layer is composed of a matrix filled layer formed by filling said porous sheet with a matrix skeletal material and a binding agent from the other surface side thereof, and a matrix adhered layer formed by adhesion of the matrix skeletal material and the binding agent on the surface of said matrix filled layer.
Claim 2
Dependent Claim
157 words
An electrode for fuel cell, which comprises in combination: an electrode base, a catalyst layer, and a matrix layer, one part or entire part of said catalyst layer and one part or entire part of said matrix layer being formed in a porous sheet in contiguous relationship, wherein said catalyst layer is composed of a catalyst filled layer formed by filling said porous sheet with catalyst powder and a binding agent from one surface side thereof, and a catalyst adhered layer formed by adhesion of the catalyst powder and the binding agent on the surface of said catalyst filled layer; and said matrix layer is composed of a matrix filled layer formed by filling said porous sheet with a matrix skeletal material and a binding agent from the other surface side thereof, and a matrix adhered layer formed by adhesion of the matrix skeletal material and the binding agent on the surface of said matrix filled layer.
Claim 3
Dependent Claim
19 words
An electrode for fuel cell according to claim 1, wherein said porous sheet has porosity of 50% or more.
Claim 4
Dependent Claim
25 words
An electrode for fuel cell according to claim 1, wherein said porous sheet is carbon fiber sheet having thickness of from 30 to 300 μm.
Claim 5
Dependent Claim
22 words
An electrode for fuel cell according to claim 1, wherein said catalyst adhered layer has thickness of from 10 to 300 μm.
Claim 6
Dependent Claim
22 words
An electrode for fuel cell according to claim 1, wherein said matrix adhered layer has thickness of from 30 to 300 μm.
Claim 7
Dependent Claim
33 words
An electrode for fuel cell according to claim 1, wherein the binding agent for said catalyst layer is fluorine-containing resin selected from the group consisting of polytetrafluoroethylene and copolymers of tetrafluoroethylene and hexafluoropropylene.
Claim 8
Dependent Claim
33 words
An electrode for fuel cell according to claim 1, wherein the binding agent for said matrix layer is fluorine-containing resin selected from the group consisting of polytetrafluoroethylene and copolymers of tetrafluoroethylene and hexafluoroethylene.
Claim 9
Dependent Claim
30 words
An electrode for fuel cell according to claim 1, wherein the binding agent for said matrix layer contains therein hydrophilic thermoplastic resins selected from the group consisting of polyether sulfone,
Claim 10
Dependent Claim
39 words
An electrode for fuel cell according to claim 1, wherein the skeletal material for said matrix layer is at least one selected from the group consisting of carbon, inorganic carbides, metal oxides, and metal phosphates, in powder or fiber.
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) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |