Patent US4749634A successfully refreshed from Google Patents.
US4749634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature storage battery
Assignee: Eltron Research Inc
•
Filing: 1986-11-28
•
Granted: 1988-06-07
•
Expires: 2006-11-28
Abstract
Abstract A high temperature, electrochemically reversible cell system comprising a divalent cation conducting solid electrolyte in contact with a positive electrode and a solid-state negative electrode contacting a divalent cation conducting molten salt providing ionic mediation to the solid electrolyte is disclosed. Suitable divalent cations include Ca 2+ ; Sr 2+ ; Ba 2+ ; Zn 2+ ; Cd 2+ ; Pb 2+ ; Hg 2+ ; and Mn 2+ . According to a preferred embodiment, Ca 2+ beta"-alumina solid electrolyte is in solid-state contact to a transition metal doped Ca 2+ beta"-alumina positive electrode, and a solid-state calcium alloy negative electrode contacts a calcium halide molten salt providing ionic mediation to the solid-state Ca 2+ beta"-alumina electrolyte.
Inventors
- 👤 Anthony F. Sammells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:52
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M10/3918; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
45 words
A high temperature electrochemical cell comprising: a solid-state divalent cation conducting electrolyte; a positive electrode in contact with said electrolyte; a solid-state negative electrode contacting a divalent cation conducting molten salt mediating agent providing ionic mediation between said solid-state negative electrode and said solid-state electrolyte.
Claim 2
Dependent Claim
45 words
A high temperature electrochemical cell comprising: a solid-state divalent cation conducting electrolyte; a positive electrode in contact with said electrolyte; a solid-state negative electrode contacting a divalent cation conducting molten salt mediating agent providing ionic mediation between said solid-state negative electrode and said solid-state electrolyte.
Claim 3
Dependent Claim
43 words
A high temperature electrochemical cell according to claim 1 wherein said divalent cation is selected from the group consisting of: Ca 2+ ; Sr 2+ ; Ba 2+ ;Zn 2+ ; ;Cd 2+ ;Pb 2+ ; Hg 2+ ; and Mn 2+ .
Claim 4
Dependent Claim
44 words
A high temperature electrochemical cell according to claim 1 wherein said electrolyte is selected from the group consisting of: Ca 2+ beta"-alumina; Sr 2+ beta"-alumina; Ba 2+ beta"-alumina; Zn 2+ beta"-alumina; Cd 2+ beta"-alumina; Pb 2+ beta"-alumina; Hg 2+ beta"-alumina; and Mn 2+ beta"-alumina.
Claim 5
Dependent Claim
24 words
A high temperature electrochemical cell according to claim 1 wherein said divalent cation is Ca 2+ and said solid-state electrolyte comprises Ca 2+ beta"-alumina.
Claim 6
Dependent Claim
67 words
A high temperature electrochemical cell according to claim 4 wherein said solid-state electrolyte is selected from the group consisting of: Ca x Li y Al 10 .4 O 17 .6 and Ca x Mg z Al 10 .4 O 17 , where x is from about 0.65 to about 1.0; y is from about 0.20 to about 0.40 and z is from about 0.50 to about 0.80.
Claim 7
Dependent Claim
23 words
A high temperature electrochemical cell according to claim 3 wherein said positive electrode comprises a solid-state divalent cation conducting transition metal doped beta"-alumina.
Claim 8
Dependent Claim
45 words
A high temperature electrochemical cell according to claim 6 wherein said transition metal is selected from the group consisting of Fe 3+ ; Cr 3+ ; Co 3+ ; Ti 4+ ; V 4+ ; Mn 3+ ; Ni 2+ ; and Cu 2+ .
Claim 9
Dependent Claim
120 words
A high temperature electrochemical cell according to claim 6 wherein said transition metal doped solid-state positive electrode is selected from the group consisting of: Ca 0 .84 Li 0 .29 Al 10 .4-a Fe a O 17 .16 ; Ca 0 .83 Mg 0 .67 Al 10 .3-a Fe a O 17 ; Ca 0 .84 Li 0 .29 Al 10 .4-a Cr a O 17 .6 ; Ca 0 .83 Mg 0 .67 Al 10 .3-a Co a O 17 ; Ca 0 .84 Li 0 .29 Al 10 .4-a Co a O 17 .6 ; and Ca 0 .83 Mg 0 .67 Al 10 .3-a Co a O 17 where a is from about 1 to about 8.
Claim 10
Dependent Claim
54 words
A high temperature electrochemical cell according to claim 6 wherein said solid-state negative electrode is selected from the group consisting of: Ca and alloys thereof; Sr and alloys thereof; Ba and alloys thereof; Zn and alloys thereof; Cd and alloys thereof; Pb and alloys thereof; Hg and alloys thereof; and Mn and alloys thereof.
Claim 11
Dependent Claim
19 words
A high temperature electrochemical cell according to claim 9 wherein said solid-state negative electrode comprises a silicon-containing calcium alloy.
Claim 12
Dependent Claim
53 words
A high temperature electrochemical cell according to claim 10 wherein said solid-state negative electrode is selected from the group consisting of: Ca 2 Si; CaSi; Ca 2 Si 1-x B x ; Ca 2 Si 1- (x+y) b x Mg y ; and Ca 2 Si 1- (x+y) B x Al y .
Claim 13
Dependent Claim
21 words
A high temperature electrochemical cell according to claim 10 wherein said molten salt mediating agent comprises a calcium halide molten salt.
Claim 14
Dependent Claim
38 words
A high temperature electrochemical cell according to claim 12 wherein said molten salt mediating agent is selected from the group consisting of: CaCl 2 ; CaCl 2 -CaI 2 ; and CaCl 2 -CaI 2 -CaBr 2 .
Claim 15
Dependent Claim
20 words
A high temperature electrochemical cell according to claim 12 wherein said molten salt mediating agent is initally a eutectic composition.
Claim 16
Dependent Claim
57 words
A high temperature electrochemical cell according to claim 1 wherein said solid-state electrolyte comprises Ca 2+ beta"-alumina; said positive electrode comprises Ca 0 .84 Li 0 .29 Al 5 .4 Fe 5 O 17 .58 ; said solid-state negative electrode comprises Ca 2 Si; and said molten salt mediating agent comprises CaCl 2 -CaI 2 eutectic salt.
Claim 17
Dependent Claim
31 words
A high temperature electrochemical cell according to claim 1 additionally comprising a current collector in contact to said positive electrode and a current collector in contact to said solid-state negative electrode.
Claim 18
Dependent Claim
48 words
A high temperature electrochemical cell according to claim 16 wherein said positive electrode current collector is selected from the group consisting of: a metallic paint and molybdenum; and said negative electrode current collector is selected from the group consisting of: low carbon steel, molybdenum, and high chromium steel.
Claim 19
Dependent Claim
63 words
A high temperature electrochemical cell according to claim 1 in a concentric tubular arrangement wherein said solid-state negative electrode is aligned at a central area of said cell along a central axis and is immersed in said molten salt mediating agent, said molten salt mediating agent is contained by said solid-state electrolyte, and said solid-state electrolyte is in contact to said positive electrode.
Claim 20
Dependent Claim
14 words
A high temperature electrochemical cell according to claim 1 additionally comprising external heating means.
Claim 21
Dependent Claim
48 words
A high temperature electrochemical cell according to claim 1 wherein said solid-state negative electrode comprises a calcium alloy; said molten salt mediating agent comprises a calcium halide eutectic; said solid-state electrolyte comprises a Ca 2+ beta"-alumina; and said positive electrode comprises a transition metal doped Ca 2+ beta"-alumina.
References Cited (Backward Citations)
US4357215A
Cited
US4294898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |