Rechargeable battery cell that is operated at normal temperatures

US7244530B2 · kind B2 · utility

Assignee

• Guenther Hambitzer · DE

Inventors

• Gunther Hambitzer · Remchingen, DE
• Christiane Ripp · Remchingen, DE
• Ingo Stassen · Dresden, DE
• Laurent Zinck · Mothern, FR
• Franziska Jager · Remchingen, DE

Key dates

• Filing date: Jun 10, 2002
• Grant date: Jul 17, 2007
• Expiry date: Nov 29, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/10
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

Rechargeable battery cell operable at normal temperature, with an SO.sub.2 based electrolyte system, a negative electrode and a positive electrode, wherein one of the electrodes has an electronically conductive discharge element. An improved cycle stability and consequently a longer useful lifetime is achieved in that, as a reaction protection material to protect the discharge element against unwanted reactions with constituents of the SO.sub.2 based electrolyte system, at least a surface layer of the electronically conductive discharge element contains an alloy of chrome with another metal and/or a protective metal, selected from rhodium, tungsten, rhenium, tantalum, platinum, iridium, osmium or technetium in pure form, as an alloy or as a constituent of a compound and/or a carbide, nitride or phosphide of titanium, nickel, cobalt, molybdenum, iron, vanadium, zirconium or manganese.