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Ingo Stassen

Christiane Ripp

Laurent Zinck

Claudia Wollfarth

Guenther Hambitzer

Gunther Hambitzer

Klaus Schorb

Franziska Jager

The invention relates to a rechargeable electrochemical battery cell. Said cell comprises a negative electrode (), an electrolyte (), and a positive electrode, the negative electrode () having a an electronically conductive substrate (), onto which an active mass () is electrolytically deposited during the charging of the cell. The aim of the invention is to significantly improve the operational safety of said cell. To achieve this, the cell in contact with the substrate ()of the negative electrode () has a porous structure ()formed by solid particles (), which is configured and positioned in such a way that the active mass (), which is deposited during the charging of the cell, penetrates from the surface of the substrate () into the pores () of the latter and is deposited again therein.

Rechargeable electrochemical battery cell

Rechargeable battery cell operable at normal temperature, with an SO.sub.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.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.

Rechargeable battery cell that is operated at normal temperatures

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Dresdan, Germany

Ingo Stassen