US3930882A
Expired / Lapsed
US
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Rechargeable galvanic cell
Assignee: Furukawa Electric Co Ltd
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Filing: 1974-01-25
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Granted: 1976-01-06
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Expires: 1994-01-25
Abstract
Abstract A rechargeable galvanic cell which comprises a zinc anode, a cathode and an electrolyte wherein the electrolyte comprises an aqueous alkaline solution containing alkali metal zincate and a polycation in an amount sufficient to suppress the formation of zinc dendrites on the surface of the zinc anode during cell charge.
Inventors
- 👤 Kazuya Ohsawa
- 👤 Katsuyoshi Hirasa
- 👤 Hideo Kinoshita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:48
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/24; H01M10/26; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
90 words
A rechargeable galvanic cell comprising a zinc anode, a cathode and an electrolyte wherein the electrolyte comprises an aqueous alkaline solution containing alkali metal zincate and a polycation selected from the group consisting of ionen type polycation and pendant type polycation in an amount sufficient to suppress the formation of zinc dendrites on said zinc anode during cell charge, said ionen type polycation having quaternary nitrogen included in the main chain of the molecule and said pendant type polycation having quaternary nitrogen included in the side chain of the molecule.
Claim 2
Dependent Claim
90 words
A rechargeable galvanic cell comprising a zinc anode, a cathode and an electrolyte wherein the electrolyte comprises an aqueous alkaline solution containing alkali metal zincate and a polycation selected from the group consisting of ionen type polycation and pendant type polycation in an amount sufficient to suppress the formation of zinc dendrites on said zinc anode during cell charge, said ionen type polycation having quaternary nitrogen included in the main chain of the molecule and said pendant type polycation having quaternary nitrogen included in the side chain of the molecule.
Claim 3
Dependent Claim
74 words
A rechargeable galvanic cell according to claim 1 wherein the polycation is an aliphatic ionen expressed by the following general formula: ##EQU2## where: n = degree of polymerization x - = anion R 1 , R 2 , R 4 and R 5 = alkyl groups having one to two carbon atoms R 3 = alkylene group having 1 to 6 carbon atoms R 6 = alkylene group having 2 to 10 carbon atoms.
Claim 4
Dependent Claim
74 words
A rechargeable galvanic cell according to claim 1 wherein the polycation is an aliphatic ionen expressed by the following general formula: ##EQU3## where: n = degree of polymerization x - = anion R 1 , r 2 , r 4 and R 5 = alkyl groups having 1 to 2 carbon atoms R 3 = alkylene group having 2 to 4 carbon atoms R 6 = alkylene group having 4 to 8 carbon atoms.
Claim 5
Dependent Claim
17 words
A rechargeable galvanic cell according to claim 2 wherein the polycation is poly(N, N, N', N'-tetramethyl-N-ethylene-N'-hexamethylene diammoniumdibromide).
Claim 6
Dependent Claim
17 words
A rechargeable galvanic cell according to claim 2 wherein the polycation is poly(N, N, N', N'-tetramethyl-N-ethylene-N'-pentamethylenediammonium dibromide).
Claim 7
Dependent Claim
17 words
A rechargeable galvanic cell according to claim 2 wherein the polycation is poly(N, N, N', N'-tetramethyl-N-trimethylene-N'-hexamethylenediammonium dibromide).
Claim 8
Dependent Claim
17 words
A rechargeable galvanic cell according to claim 2 wherein the polycation is poly(N, N, N', N'-tetramethyl-N-trimethylene-N'-pentamethylenediammonium dibromide).
Claim 9
Dependent Claim
14 words
A rechargeable galvanic cell according to claim 1 wherein the polycation is poly(vinylbenzyltrialkylammonium salt).
Claim 10
Dependent Claim
14 words
A rechargeable galvanic cell according to claim 8 wherein the polycation is poly(vinylbenzyltrimethylammonium chloride).
Claim 11
Dependent Claim
14 words
A rechargeable galvanic cell according to claim 1 wherein the polycation is poly(oxyethyl-1-methylenetrialkylammonium salt).
Claim 12
Dependent Claim
14 words
A rechargeable galvanic cell according to claim 10 wherein the polycation is poly(oxyethyl-1-methylenetrimethylammonium chloride).
Claim 13
Dependent Claim
18 words
A rechargeable galvanic cell according to claim 1 wherein the polycation is prepared by quarternizing polyepihalohydrin with trimethylamine.
Claim 14
Dependent Claim
18 words
A rechargeable galvanic cell according to claim 12 wherein the polycation is prepared by quarternizing polyepichlorohydrin with trimethylamine.
Claim 15
Dependent Claim
20 words
A rechargeable galvanic cell according to claim 1 wherein the polycation has an average molecular weight of 500 to 50,000.
Claim 16
Dependent Claim
20 words
A rechargeable galvanic cell according to claim 1 wherein the polycation has an average molecular weight of 1,000 to 20,000.
Claim 17
Dependent Claim
33 words
A rechargeable galvanic cell according to claim 1 wherein the polycation is present in the electrolyte in an amount of 0.01 to 10 percent by weight based on the weight of said electrolyte.
Claim 18
Dependent Claim
33 words
A rechargeable galvanic cell according to claim 1 wherein the polycation is present in the electrolyte in an amount of 0.1 to 2 percent by weight based on the weight of said electrolyte.
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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |