EP0764489A1
Expired / Lapsed
EP
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Porous metallic body with large specific surface area, process for producing the same, porous metallic platy material, and electrode of alkaline secondary battery
Assignee: Mitsubishi Materials Corp
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Filing: 1996-04-02
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Granted: —
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Expires: 2016-04-02
Abstract
Abstract A porous metallic body that has a three-dimensional reticular skeleton structure wholly constituted of a powdery metallic sinter with a porosity of 10-60 % and that has a total porosity of 80-99 %. The specific surface are thereof is as large as, for example, 300-11,000 cm 2 /cm 3 . This body can be reinforced with reinforcing plates and is suitable as an electrode of a alkaline secondary battery capable of attaining a long service life and a large capacity of active materials which can be contained. The metallic body is produced by molding a foamable slurry containing a metallic powder, drying the molded slurry preferably after foaming, and sintering the same.
Inventors
- 👤 Kouji Sougou-kenkyusho Mitsubishi HOSHINO
- 👤 Yoshitaka Sougou-kenkyusho Mitsubishi MAYUZUMI
- 👤 Tohru Sougou-kenkyusho Mitsubishi KOHNO
- 👤 Norikazu Sougou-kenkyusho Mitsubishi KOMADA
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 14:50
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/22; B22F3/225; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2027; B01D39/2051; B01J; B01J35/00; B01J35/50; B01J35/56; B01J37/00; B01J37/0009; B01J37/0018; B22F3/10; B22F3/11; B22F3/1103; B22F3/1121; B22F3/1125; H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/72; H01M4/74; H01M4/742; H01M4/80; H01M4/808; B22F2003/1131; B22F2998/00; B22F2998/10; B22F2999/00; H01M2300/00; H01M2300/0002; H01M2300/0014; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12021; Y10T428/12028; Y10T428/12042; Y10T428/12063
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
43 words
A porous metallic material with a high specific surface area comprising a skeleton in a three-dimensional network structure the inside of which entirely comprises a sintered metal powder having a porosity of 10 to 60%, wherein the overall porosity is 80 to 99%.
Claim 2
Dependent Claim
29 words
A porous metallic material with a high specific surface area according to Claim 1, wherein the overall specific surface area is 300 to 11000 cm 2 /cm 3 .
Claim 3
Dependent Claim
25 words
A porous metallic material according to Claim 1, wherein the pores formed by the skeleton have an average pore size of 60 to 700 µm.
Claim 4
Dependent Claim
76 words
A porous metallic plate material with a high specific surface area comprising a skeleton in a three-dimensional network structure the inside of which entirely comprises a sintered metal powder having a porosity of 10 to 60%, and a porous surface layer which is provided on one or both sides of the metallic plate material and which has pores formed by the skeleton and relatively smaller than internal pores, wherein the overall porosity is 80 to 99%.
Claim 5
Dependent Claim
58 words
A porous metallic plate material with a high specific surface area comprising a porous metallic body and a reinforcing plate, wherein the porous metallic body comprises a skeleton in a three-dimensional network structure the inside of which entirely comprises a sintered metal powder having a porosity of 10 to 60%, and the overall porosity is 80 to 99%.
Claim 6
Dependent Claim
25 words
A porous metallic plate material according to Claim 5, wherein the reinforcing plate is selected from a network material, a plate and a perforated plate.
Claim 7
Dependent Claim
22 words
A porous metallic plate material according to Claim 5 or 6, wherein the reinforcing plate is held in the porous metallic body.
Claim 8
Dependent Claim
63 words
An electrode of a secondary battery comprising: a porous metallic substrate comprising a three-dimensional skeleton and pores which are formed by the skeleton and which are filled with an active material; wherein the skeleton has micropores having an average micropore size of 0.5 to 20 µ, and the inside thereof entirely comprises a sintered metal powder having a porosity of 10 to 60%.
Claim 9
Dependent Claim
24 words
An electrode of a secondary battery according to Claim 8, wherein the micropores in the sintered metal powder are filled with an active material.
Claim 10
Dependent Claim
28 words
An electrode of a secondary battery according to Claim 8, wherein the pores of the porous metallic substrate have an average pore size of 60 to 700 µm.
Claim 11
Dependent Claim
17 words
An electrode of a secondary battery according to Claim 8, wherein the active material is nickel hydroxide.
Claim 12
Dependent Claim
38 words
A method of producing a porous metallic material according to Claim 1, comprising the steps of: preparing a foamable slurry containing a metal powder; forming the foamable slurry; drying the formed product; and burning the dry formed product.
Claim 13
Dependent Claim
27 words
A method of producing a porous metallic material according to Claim 12, wherein the foamable slurry contains a foaming agent, a water-soluble resin binder and a surfactant.
Claim 14
Dependent Claim
25 words
A method of producing a porous metallic material according to Claim 12, further comprising the foaming step between the forming step and the drying step.
Claim 15
Dependent Claim
25 words
A method of producing a porous metallic material according to Claim 12, the metal powder has an average particle size of 0.5 to 500 µm.
References Cited (Backward Citations)
No citation records indexed.
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