US4542444A
Expired / Lapsed
US
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Double layer energy storage device
Assignee: Standard Oil Co
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Filing: 1983-12-27
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Granted: 1985-09-17
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Expires: 2003-12-27
Abstract
Abstract The present invention provides an improved electrical double layer energy storage cell comprising a pair of electrodes, at least one of which is a carbon paste electrode, a porous ionically conductive separator and an ion insulated connector, the improvement wherein said carbon paste electrode comprises carbon exhibiting a pore volume of less than about 0.45 cc/gm and a median pore radius of less than about 150 Angstroms.
Inventors
- 👤 Richard C. Boland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:39
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/583; H01G; H01G11/00; H01G11/10; H01G11/22; H01G11/24; H01G11/30; H01G11/32; H01G11/34; H01G11/38; H01M10/00; H01M10/05; H01G11/52; H01G11/54; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/13
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
65 words
An improved double layer energy storage cell, said cell containing a pair of electrodes, at least one of said electrodes being a carbon paste electrode, a porous ionically conductive separator and an ion insulating connector, the improvement wherein said carbon paste electrode comprises carbon exhibiting a pore volume of less than about 0.45 cc/gm and a median pore radius of less than about 150 Angstroms.
Claim 2
Dependent Claim
65 words
An improved double layer energy storage cell, said cell containing a pair of electrodes, at least one of said electrodes being a carbon paste electrode, a porous ionically conductive separator and an ion insulating connector, the improvement wherein said carbon paste electrode comprises carbon exhibiting a pore volume of less than about 0.45 cc/gm and a median pore radius of less than about 150 Angstroms.
Claim 3
Dependent Claim
20 words
The cell of claim 1 wherein said carbon exhibits a surface area of greater than about 500 m 2 /gm.
Claim 4
Dependent Claim
28 words
The cell of claim 2 wherein said carbon exhibits a pore volume of less than 0.4 cc/gm and a mediam pore radius of less than about 100 Angstroms.
Claim 5
Dependent Claim
29 words
The cell of claim 3 wherein said carbon exhibits a pore volume of less than about 0.35 cc/gm and a mediam pore radius of less than about 80 Angstrom.
Claim 6
Dependent Claim
20 words
The cell of claim 1 wherein said carbon contains less than about 500 ppm of iron, copper, molybdenum and vanadium.
Claim 7
Dependent Claim
20 words
The cell of claim 5 wherein said carbon contains less than about 200 ppm of iron, copper molybdenum and vanadium.
Claim 8
Dependent Claim
26 words
The cell of claim 5 wherein the average diameter of the carbon particles in said carbon paste electrode range between about 1 to about 200 microns.
Claim 9
Dependent Claim
21 words
The process of claim 7 wherein the average diameter of said carbon particles ranges between about 15 to about 150 microns.
Claim 10
Dependent Claim
16 words
The cell of claim 8 wherein said carbon paste electrode comprises carbon and an aqueous electrolyte.
Claim 11
Dependent Claim
16 words
The cell of claim 9 wherein said aqueous electrolyte is an aqueous solution of sulfuric acid.
Claim 12
Dependent Claim
13 words
The cell of claim 10 wherein said electrolyte contains a voltage regulating agent.
Claim 13
Dependent Claim
22 words
The cell of claim 11 wherein said voltage regulating agent has an oxidation potential of between 0.6 volts and about 1.2 volts.
Claim 14
Dependent Claim
12 words
The cell of claim 12 wherein said voltage regulating agent is bromide.
Claim 15
Dependent Claim
14 words
The cell of claim 1 whereing said carbon is a petroleum derived activated carbon.
Claim 16
Dependent Claim
21 words
The electrical double layer energy storage cell of claim 14 wherein said carbon is activated by a high temperature/steam activation technique.
Claim 17
Dependent Claim
74 words
An improved double layer energy storage device comprised of a plurality of electrical double layer energy storage cells containing a pair of electrodes, at least one of said electrodes being a carbon paste electrode, a porous ionically conductive separator and an ion insulating connector, the improvement wherein said carbon paste electrode comprises carbon exhibiting a pore volume of less than about 0.45 cc/gm and a median pore radius of less than about 150 Angstroms.
Claim 18
Dependent Claim
74 words
An improved double layer energy storage device comprised of a plurality of electrical double layer energy storage cells containing a pair of electrodes, at least one of said electrodes being a carbon paste electrode, a porous ionically conductive separator and an ion insulating connector, the improvement wherein said carbon paste electrode comprises carbon exhibiting a pore volume of less than about 0.45 cc/gm and a median pore radius of less than about 150 Angstroms.
Claim 19
Dependent Claim
20 words
The device of claim 16 wherein said carbon exhibits a surface area of greater than about 500 m 2 /gm.
Claim 20
Dependent Claim
28 words
The device of claim 17 wherein said carbon exhibits a pore volume of less than 0.4 cc/gm and a mediam pore radius of less than about 100 Angstroms.
Claim 21
Dependent Claim
29 words
The device of claim 18 wherein said carbon exhibits a pore volume of less than about 0.35 cc/gm and a mediam pore radius of less than about 80 Angstrom.
Claim 22
Dependent Claim
80 words
An electrical double layer energy storate cell comprising: (a) a housing; (b) at least one pair of spaced carbon paste electrodes in said housing; said electrodes being an admixture of carbon and electrolyte, said carbon exhibiting a pore volume of less than about 0.45 cc/gm and a median pore radius of less than about 150 Angstroms; and (c) an ionically conductive separator means between and in contact with said electrodes, said separator means electronically separating said electrodes from each other.
Claim 23
Dependent Claim
80 words
An electrical double layer energy storate cell comprising: (a) a housing; (b) at least one pair of spaced carbon paste electrodes in said housing; said electrodes being an admixture of carbon and electrolyte, said carbon exhibiting a pore volume of less than about 0.45 cc/gm and a median pore radius of less than about 150 Angstroms; and (c) an ionically conductive separator means between and in contact with said electrodes, said separator means electronically separating said electrodes from each other.
Claim 24
Dependent Claim
93 words
An electrical double layer energy storage device comprising a plurality of electrical double layer energy storage cells, said cells each comprising: (a) a housing; (b) at least one pair of spaced carbon paste electrodes in said housing; said electrodes being an admixture of carbon and electrolyte, said carbon exhibiting a pore volume of less than about 0.45 cc/gm and a median pore radius of less than about 150 Angstroms; and (c) an ionically conductive separator means between and in contact with said electrodes, said separator means electronically separating said electrodes from each other.
Claim 25
Dependent Claim
93 words
An electrical double layer energy storage device comprising a plurality of electrical double layer energy storage cells, said cells each comprising: (a) a housing; (b) at least one pair of spaced carbon paste electrodes in said housing; said electrodes being an admixture of carbon and electrolyte, said carbon exhibiting a pore volume of less than about 0.45 cc/gm and a median pore radius of less than about 150 Angstroms; and (c) an ionically conductive separator means between and in contact with said electrodes, said separator means electronically separating said electrodes from each other.
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) | 1988-09-16 | 1989-03-18 | 1989-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-16 | 1993-03-18 | 1993-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-16 | 1997-03-18 | 1997-09-17 | $7700.00 | Window Closed / Lapsed |