US4464447A
Expired / Lapsed
US
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Rechargeable lithium batteries with non-metal electrodes
Assignee: Consiglio Nazionale delle Richerche
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Filing: 1982-01-06
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Granted: 1984-08-07
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Expires: 2002-01-06
Abstract
Abstract Utilization of Fe 2 O 3 , or more generally M 2 O 3 materials, after suitable electrochemical reaction with lithium, as improved non-metal lithium electrodes for the realization of lithium rechargeable batteries. These materials may be used as negative electrodes in replacement of lithium metal or lithium alloys in batteries using organic electrolytes, with the specific advantages of avoiding passivation and dendritic deposition effects during cycling.
Inventors
- 👤 Mario Lazzari
- 👤 Bruno Scrosati
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:22
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/052; H01M10/0525; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/485; H01M4/52; H01M4/525; H01M4/58; H01M4/581; H01M2004/026; H01M2004/027; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
67 words
A rechargeable lithium battery with non-metal electrodes which comprises a positive electrode, a negative electrode and a non-aqueous electrolyte, said negative electrode being a material of the formula Li x M 2 O 3 where M is a transition metal and x ranges from 1 to 6, said material being obtained by electrochemically reacting with lithium a metal oxide of the formula M 2 O 3 .
Claim 2
Dependent Claim
67 words
A rechargeable lithium battery with non-metal electrodes which comprises a positive electrode, a negative electrode and a non-aqueous electrolyte, said negative electrode being a material of the formula Li x M 2 O 3 where M is a transition metal and x ranges from 1 to 6, said material being obtained by electrochemically reacting with lithium a metal oxide of the formula M 2 O 3 .
Claim 3
Dependent Claim
10 words
The battery according to claim 1, wherein M is Fe.
Claim 4
Dependent Claim
12 words
The battery according to claim 1, wherein M is Co or Cr.
Claim 5
Dependent Claim
13 words
The battery according to claim 1, wherein x ranges from 0.1 to 5.5.
Claim 6
Dependent Claim
16 words
The battery according to claim 1, wherein said non-aqueous electrolyte is LiClO 4 in propylene carbonate.
Claim 7
Dependent Claim
35 words
The battery according to claim 1, wherein said material of the formula Li x M 2 O 3 is prepared by discharging cells of the type Li/LiClO 4 , propylene carbonate/Fe 2 O 3 .
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) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |