US5434023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paste-type electrode for alkali secondary cell
Assignee: FDK Twicell Co Ltd
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Filing: 1994-10-14
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Granted: 1995-07-18
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Expires: 2014-10-14
Abstract
Abstract There is provided a paste-type electrode for an alkali secondary cell which can suppress occurrence of internal short-circuiting, which is likely to happen when an electrode is rolled along with another electrode having the opposite polarity and a separator interposed therebetween. The paste-type electrode for an alkali secondary cell comprises a three-dimensional substrate including a felt-like metal porous member in which a plurality of hollow metal fibers are arranged three-dimensionally, diameters of those of the metal fibers arranged near the surface portion of the porous member being greater than those arranged in the inner portion, an average diameter of those of the metal fibers near the surface portion being in a range of 20 to 150 μm, and an average diameter of those of the metal fibers in the inner portion being in a range of 10 to 100 μm, and paste containing an activation substance filled in the three-dimensional substrate.
Inventors
- 👤 Hirohito Teraoka
- 👤 Katuyuki Hata
- 👤 Kunihiko Miyamoto
- 👤 Kouji Ishiwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:45
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/362; H01M4/366; H01M10/00; H01M10/04; H01M10/0431; H01M4/24; H01M4/32; H01M4/38; H01M4/383; H01M4/48; H01M4/52; H01M4/64; H01M4/70; H01M4/80; H01M4/808; H01M2004/021; H01M2300/00; H01M2300/0002; H01M2300/0014; H01M4/62; H01M4/621; H01M6/00; H01M6/04; H01M6/06; H01M6/10; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
109 words
A paste-type electrode for an alkali secondary cell consisting essentially of: a three-dimensional substrate including a porous felt-metal member in which a plurality of hollow metal fibers are arranged three-dimensionally, diameters of those of said metal fibers arranged near the surface portion of said porous member being greater than those arranged in the inner portion, a diameter of those of said metal fibers near the surface portion being in a range of 20 to 150 μm, and a diameter of those of said metal fibers in the inner portion being in a range of 10 to 100 μm; and paste containing an activation substance filled in said three-dimensional substrate.
Claim 2
Dependent Claim
109 words
A paste-type electrode for an alkali secondary cell consisting essentially of: a three-dimensional substrate including a porous felt-metal member in which a plurality of hollow metal fibers are arranged three-dimensionally, diameters of those of said metal fibers arranged near the surface portion of said porous member being greater than those arranged in the inner portion, a diameter of those of said metal fibers near the surface portion being in a range of 20 to 150 μm, and a diameter of those of said metal fibers in the inner portion being in a range of 10 to 100 μm; and paste containing an activation substance filled in said three-dimensional substrate.
Claim 3
Dependent Claim
52 words
A paste-type electrode according to claim 1, wherein an average diameter of those of said metal fibers located near the surface portion of said felt-like metal porous member is 1.5 times or more as large as that of those of said metal fibers located in the inner portion of said porous member.
Claim 4
Dependent Claim
25 words
A paste-type electrode according to claim 1, wherein said porous felt-metal member has a texture size of 300 g/m 2 to 800 g/m 2 .
Claim 5
Dependent Claim
36 words
A paste-type electrode according to claim 1, wherein said three-dimensional substrate has a structure in which the surface of said porous felt-metal member is further covered by a net reinforcing layer made of hollow metal fibers.
Claim 6
Dependent Claim
35 words
A paste-type electrode according to claim 1, wherein an inside of said three-dimensional substrate is filled with said paste, and an entire surface of said substrate is coated with a layer made of said paste.
Claim 7
Dependent Claim
18 words
A paste-type electrode according to claim 5, wherein said layer has a thickness of 10 to 100 μm.
Claim 8
Dependent Claim
17 words
A paste-type electrode according to claim 1, wherein said paste contains nickel hydroxide as an activation substance.
Claim 9
Dependent Claim
14 words
A paste-type electrode according to claim 1, wherein said paste contains hydrogen absorbing alloy.
Claim 10
Dependent Claim
26 words
A paste-type electrode according to claim 1, wherein said hollow metal fibers have a laminated structure in which two different types of metals are coaxially arranged.
Claim 11
Dependent Claim
51 words
A paste-type electrode according to claim 9, wherein an inner circumferential side of each of said hollow metal fibers is made of a noble metal selected from the group consisting of Ag, Au, Pt and Pd, and an outer circumferential side of each of said hollow fibers is made of Ni.
Claim 12
Dependent Claim
60 words
A paste-type electrode according to claim 1, wherein Said paste contains an activation substance and at least one type of conductive material selected from the group consisting of metal cobalt and a cobalt compound, said activation substance comprising nickel hydroxide which has a half value width of the peak of (101) plane in X-ray diffraction (20) being 0.8° or higher.
Claim 13
Dependent Claim
23 words
A paste-type electrode according to claim 11, wherein said conductive material and said nickel hydroxide are non-eutectic with each other in said paste.
Claim 14
Dependent Claim
22 words
A paste-type electrode according to claim 11, wherein said activation substance further contains an eutectic substance made of nickel hydroxide and cadmium.
Claim 15
Dependent Claim
22 words
A paste-type electrode according to claim 11, wherein said activation substance further contains an eutectic substance made of nickel hydroxide and zinc.
Claim 16
Dependent Claim
54 words
A paste-type electrode according to claim 1, wherein said paste contains an activation substance and at least one type of conductive material selected from the group consisting of metal cobalt and a cobalt compound, said activation substance comprising nickel hydroxide which has a dehydration reaction temperature of 270° C. or lower by thermogravimetric analysis.
Claim 17
Dependent Claim
23 words
A paste-type electrode according to claim 15, wherein said conductive material and said nickel hydroxide are non-eutectic with each other in said paste.
Claim 18
Dependent Claim
22 words
A paste-type electrode according to claim 15, wherein said activation substance further contains an eutectic substance made of nickel hydroxide and cadmium.
Claim 19
Dependent Claim
22 words
A paste-type electrode according to claim 15, wherein said activation substance further contains an eutectic substance made of nickel hydroxide and zinc.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-07-17 | 1999-01-16 | 1999-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-07-17 | 2003-01-16 | 2003-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-07-17 | 2007-01-16 | 2007-07-18 | $7700.00 | Window Closed / Lapsed |