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US4362793A Expired / Lapsed US ⏱️ 0.0 years remaining

Galvanic cell with solid electrolyte

Assignee: VARTA Batterie AG
•
Filing: 1981-05-14
•
Granted: 1982-12-07
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Expires: 2001-05-14
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Abstract

Abstract A galvanic cell with solid electrolyte, which is dischargeable at room temperature and whose positive electrode consists of the metals Sb, Bi, or of the oxides or chalcogenides of these metals, or of mixtures of members of the respective groups, bases its current productive processes upon the formation of a reversible inter-metallic combination between the Sb or Bi and the alkali metal of the negative electrode. The reaction equations are: 3Li+Bi=Li.sub.3 Bi or (1) 12 Li+Bi.sub.2 O.sub.3 =2 Li.sub.3 Bi+3Li.sub.2 O (2) A cathode material according to equation (2) is particularly desirable because Bi 2 O 3 has a higher volumetric capacity than Bi, due to the greater electron transition from Bi 3+ to Bi 3- , thereby yielding higher energy density. In both cases the discharge potential is 0.8 V. As the solid electrolyte, Li 3 N or Na 3 Zr 2 Si 2 PO 12 (Nasicon) can be used.

Inventors

  • 👤 Rainer Bittihn
  • 👤 Armin Wagner
  • 👤 Jean-Paul Randin
  • 👤 Jean-Daniel Rosselet

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 08:45
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/056; H01M10/0561; H01M10/0562; H01M4/00; H01M4/02; H01M4/36; Y; Y02; Y02E; Y02E60/00; Y02E60/10

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 113 words
A galvanic cell with solid electrolyte, having a negative lithium or sodium electrode, a solid positive electrode and a solid electrolyte between the electrodes and dischargeable at room temperature, wherein the positive electrode consists, in the charged state, either individually or intermixed, of metallic Sb, Bi or oxides and chalcogenides of these metals, and in the discharged state, of a reversible intermetallic combination of the Sb or, Bi, or Sh and Bi with the alkali metal of the negative electrode, and the electrolyte is Li 3 N when the negative electrode is a lithium electrode and is Na 3 Zr 2 Si 2 PO 12 when the negative electrode is a sodium electrode.
Claim 2
Dependent Claim 113 words
A galvanic cell with solid electrolyte, having a negative lithium or sodium electrode, a solid positive electrode and a solid electrolyte between the electrodes and dischargeable at room temperature, wherein the positive electrode consists, in the charged state, either individually or intermixed, of metallic Sb, Bi or oxides and chalcogenides of these metals, and in the discharged state, of a reversible intermetallic combination of the Sb or, Bi, or Sh and Bi with the alkali metal of the negative electrode, and the electrolyte is Li 3 N when the negative electrode is a lithium electrode and is Na 3 Zr 2 Si 2 PO 12 when the negative electrode is a sodium electrode.
Claim 3
Dependent Claim 37 words
The cell of claim 1 wherein the oxides and chalcogenides are selected from the group consisting of Sb 2 O 3 , Sb 2 S 3 , Bi 2 O 3 , Bi 2 S 3 .
Claim 4
Dependent Claim 21 words
The cell of claim 1 wherein the positive electrode electrode material also includes a binder of polytetrafluoroethylene and a conducting material.
Claim 5
Dependent Claim 11 words
The cell of claim 3 wherein the conducting material is graphite.
Claim 6
Dependent Claim 13 words
The cell of claim 1 wherein the negative electrode is a lithium electrode.
Claim 7
Dependent Claim 13 words
The cell of claim 1 wherein the negative electrode is a sodium electrode.

References Cited (Backward Citations)

US3988164A Cited
US4258109A Cited
US4139681A Cited
US4299890A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1985-12-06 1986-06-07 1986-12-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-12-06 1990-06-07 1990-12-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-12-06 1994-06-07 1994-12-07 $7700.00 Window Closed / Lapsed

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