US4684584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical power generation with thermal electrolyte management
Assignee: Northrop Grumman Corp
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Filing: 1986-05-20
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Granted: 1987-08-04
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Expires: 2006-05-20
Abstract
Abstract A method of power generation and associated system therefor employing an electrochemical cell including a reactive metal anode, a cathode spaced from the anode and an electrolyte comprising an aqeuous solution of the hydroxide of the reactive metal is disclosed. The method of the invention utilizes the thermal coefficient of solubility of the metal hydroxide anode reaction product as a means by which electrolyte management is accomplished. The electrolyte, after passing through the electrochemical cell to generate electric power, is cooled to precipitate at least a portion of the reactive metal hydroxide. The precipitate is then separated from the electrolyte, thereby reducing the concentration of the reactive metal hydroxide in the electrolyte. The resulting electrolyte is then recirculated to the electrochemical cell.
Inventors
- 👤 Arnold Z. Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:25
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/50; H01M6/5077; H01M10/00; H01M10/60; H01M10/61; H01M10/613; H01M10/62; H01M10/625; H01M50/00; H01M50/70; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
114 words
A method of power generation, said method comprising the steps of: providing an electrochemical cell including a reactive metal anode, a cathode spaced from said anode to define a reaction zone, and an electrolyte comprising an aqueous solution of the hydroxide of said reactive metal and a common ion agent effective in increasing the thermal coefficient of solubility of said hydroxide in said electrolyte; flowing said electrolyte through said reaction zone to generate electric power; cooling said electrolyte flowing from said reaction zone to precipitate at least a portion of said reactive metal hydroxide; separating at least a portion of said precipitate from said electrolyte; and, recirculating said separated electrolyte to said electrochemical cell.
Claim 2
Independent Claim
114 words
A method of power generation, said method comprising the steps of: providing an electrochemical cell including a reactive metal anode, a cathode spaced from said anode to define a reaction zone, and an electrolyte comprising an aqueous solution of the hydroxide of said reactive metal and a common ion agent effective in increasing the thermal coefficient of solubility of said hydroxide in said electrolyte; flowing said electrolyte through said reaction zone to generate electric power; cooling said electrolyte flowing from said reaction zone to precipitate at least a portion of said reactive metal hydroxide; separating at least a portion of said precipitate from said electrolyte; and, recirculating said separated electrolyte to said electrochemical cell.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said reactive metal comprises an alkali metal.
Claim 4
Dependent Claim
11 words
The method of claim 2 wherein said alkali metal comprises lithium.
Claim 5
Dependent Claim
25 words
The method of claim 1 wherein said common ion agent comprises a water soluble, ionizable compound having a common cation with said reactive metal hydroxide.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein said electrolyte comprises aqueous lithium hydroxide and said common ion agent comprises lithium chloride.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein said common ion agent comprises a water soluble, ionizable compound having a hydroxide anion.
Claim 8
Dependent Claim
21 words
The method of claim 6 wherein said electrolyte comprises aqueous lithium hydroxide and said common ion agent comprises aqueous sodium hydroxide.
Claim 9
Dependent Claim
18 words
The method of claim 7 wherein said aqueous sodium hydroxide is present in a concentration of about 0-25M.
Claim 10
Dependent Claim
18 words
The method of claim 8 wherein said aqueous sodium hydroxide is present in a concentration of about 6-12M.
Claim 11
Dependent Claim
38 words
The method of claim 1 wherein said cooling of said electrolyte is effective in reducing the temperature of said electrolyte at least about 5° C. with respect to the temperature of said electrolyte flowing through said reaction zone.
Claim 12
Dependent Claim
17 words
The method of claim 1 additionally comprising the step of supplementing said recirculated separated electrolyte with water.
Claim 13
Independent Claim
114 words
A system for power generation comprising: an electrochemical cell including a reactive metal anode, a cathode spaced from said anode to define a reaction zone, an electrolyte comprising an aqueous solution of the hydroxide of said reactive metal and a common ion agent effective in increasing the thermal coefficient of solubility of said hydroxide in said electrolyte; means for flowing said electrolyte through said reaction zone to generate electric power; means for cooling said electrolyte flowing from said reaction zone precipitate at least a portion of said reactive metal hydroxide; means for separating at least a portion of said precipitate from said electrolyte; and, means for recirculating said separated electrolyte to said electrochemical cell.
Claim 14
Independent Claim
114 words
A system for power generation comprising: an electrochemical cell including a reactive metal anode, a cathode spaced from said anode to define a reaction zone, an electrolyte comprising an aqueous solution of the hydroxide of said reactive metal and a common ion agent effective in increasing the thermal coefficient of solubility of said hydroxide in said electrolyte; means for flowing said electrolyte through said reaction zone to generate electric power; means for cooling said electrolyte flowing from said reaction zone precipitate at least a portion of said reactive metal hydroxide; means for separating at least a portion of said precipitate from said electrolyte; and, means for recirculating said separated electrolyte to said electrochemical cell.
Claim 15
Dependent Claim
13 words
The system of claim 12 wherein said reactive metal comprises an alkali metal.
Claim 16
Dependent Claim
11 words
The system of claim 13 wherein said alkali metal comprises lithium.
Claim 17
Dependent Claim
25 words
The system of claim 12 wherein said common ion agent comprises a water soluble, ionizable compound having a common cation with said reactive metal hydroxide.
Claim 18
Dependent Claim
20 words
The system of claim 15 wherein said electrolyte comprises aqueous lithium hydroxide and said common ion agent comprises lithium chloride.
Claim 19
Dependent Claim
17 words
The system of claim 12 wherein said common ion agent comprises a compound having a hydroxide anion.
Claim 20
Dependent Claim
21 words
The system of claim 17 wherein said electrolyte comprises aqueous lithium hydroxide and said common ion agent comprises aqueous sodium hydroxide.
Claim 21
Dependent Claim
18 words
The system of claim 18 wherein said aqueous sodium hydroxide is present in a concentration of about 0-25M.
Claim 22
Dependent Claim
18 words
The system of claim 19 wherein said aqueous sodium hydroxide is present in a concentration of about 6-12M.
Claim 23
Dependent Claim
38 words
The system of claim 12 wherein said cooling of said electrolyte is effective in reducing the temperature of said electrolyte at least about 5° C. with respect to the temperature of said electrolyte flowing through said reaction zone.
Claim 24
Dependent Claim
16 words
The system of claim 12 additionally comprising means for supplementing said recirculating separated electrolyte with water.
References Cited (Backward Citations)
US2940820A
Cited
US3887400A
Cited
US3791871A
Cited
US4207297A
Cited
US4485154A
Cited
US4528248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-03 | 1991-02-02 | 1991-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-03 | 1995-02-02 | 1995-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-03 | 1999-02-02 | 1999-08-04 | $7700.00 | Window Closed / Lapsed |