US5466546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive nickel electrode for nickel metal hydride cells
Assignee: Congress Financial Corp Florida
•
Filing: 1993-03-01
•
Granted: 1995-11-14
•
Expires: 2013-03-01
Abstract
Abstract A positive electrode for use in a rechargeable nickel metal hydride cell and method of manufacture is disclosed. The electrode includes an electrically conductive substrate and an electrochemically active material. The active material includes nickel hydroxide carried by the substrate. A calcium-containing compound is deposited onto the active material to coat the active material with calcium.
Inventors
- 👤 Saverio F. Pensabene
- 👤 Vincent J. Puglisi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:14
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/32; H01M10/00; H01M10/34; H01M10/345; H01M4/36; H01M4/48; H01M4/52; H01M2004/026; H01M2004/028; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
37 words
A positive electrode for use in a rechargeable nickel metal hydride cell comprising: an electrically conductive substrate; an electrochemically active material comprising nickel hydroxide carried by said substrate; and a calcium-containing compound deposited onto said active material.
Claim 2
Dependent Claim
37 words
A positive electrode for use in a rechargeable nickel metal hydride cell comprising: an electrically conductive substrate; an electrochemically active material comprising nickel hydroxide carried by said substrate; and a calcium-containing compound deposited onto said active material.
Claim 3
Dependent Claim
14 words
The electrode as claimed in claim 1, wherein said calcium-containing compound comprises calcium hydroxide.
Claim 4
Dependent Claim
46 words
The electrode as claimed in claim 2, wherein said calcium hydroxide is chemically precipitated onto said active material by dipping said active material into an aqueous neutral or acidic solution of a calcium salt or calcium complex having a calcium concentration of about 10 -5 M-6.5M.
Claim 5
Dependent Claim
37 words
The electrode as claimed in claim 3, wherein said calcium hydroxide is formed by dipping said active material into an aqueous calcium acetate solution, drying the dipped active material, and converting the calcium acetate to calcium hydroxide.
Claim 6
Dependent Claim
26 words
The electrode as claimed in claim 4, wherein said active material is dipped a plurality of times to increase the amount of calcium hydroxide deposited thereon.
Claim 7
Dependent Claim
41 words
The electrode as claimed in claim 2, wherein said calcium hydroxide is chemically precipitated onto said active material by dipping said active material into an aqueous base solution of calcium hydroxide having a calcium concentration of 10 -3 to -5 M.
Claim 8
Dependent Claim
21 words
The electrode as claimed in claim 1, wherein said electrochemically active material comprises a mixture of nickel hydroxide and calcium hydroxide.
Claim 9
Dependent Claim
21 words
The electrode as claimed in claim 1, wherein said substrate and active material are in the form of a sintered electrode.
Claim 10
Dependent Claim
52 words
A positive electrode for use in a rechargeable nickel metal hydride cell comprising: a current collecting substrate; an electrochemically active material carried by said substrate and comprising nickel hydroxide; and a layer of calcium hydroxide deposited onto said electrochemically active material after physical formation of said electrochemically active material in said substrate.
Claim 11
Dependent Claim
52 words
A positive electrode for use in a rechargeable nickel metal hydride cell comprising: a current collecting substrate; an electrochemically active material carried by said substrate and comprising nickel hydroxide; and a layer of calcium hydroxide deposited onto said electrochemically active material after physical formation of said electrochemically active material in said substrate.
Claim 12
Dependent Claim
20 words
The electrode as claimed in claim 9, wherein said active material comprises a mixture of nickel hydroxide and calcium hydroxide.
Claim 13
Dependent Claim
21 words
The electrode as claimed in claim 9, wherein said additional layer of calcium hydroxide is chemically deposited onto said active material.
Claim 14
Dependent Claim
25 words
The electrode as claimed in claim 9, wherein said current collector substrate and said electrochemically active material are in the form of a sintered electrode.
Claim 15
Dependent Claim
56 words
A positive sintered electrode for use in a rechargeable nickel metal hydride cell comprising: electrically conductive substrate means; an electrochemically active material comprising nickel hydroxide and calcium hydroxide precipitated onto said substrate means; and an additional layer of calcium hydroxide deposited onto said active material. an additional layer of calcium hydroxide deposited onto said active material.
Claim 16
Dependent Claim
56 words
A positive sintered electrode for use in a rechargeable nickel metal hydride cell comprising: electrically conductive substrate means; an electrochemically active material comprising nickel hydroxide and calcium hydroxide precipitated onto said substrate means; and an additional layer of calcium hydroxide deposited onto said active material. an additional layer of calcium hydroxide deposited onto said active material.
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) | 1998-11-13 | 1999-05-15 | 1999-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-13 | 2003-05-15 | 2003-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-13 | 2007-05-15 | 2007-11-14 | $7700.00 | Window Closed / Lapsed |