Varta Batterie Aktiengesellschaft

Margarete Jung

August Winsel

Ernst Voss

Tsvetko Chobanov

A palladium-containing catalyst mat is made of a rolled PTFE-Kieselgur mixture which has been soaked with PdCl.sub.2 solution. It is made hydrophobic after soaking by treatment with a PTFE-Emulsion. Finally, it is subjected at about 430.degree. C. to a process which is similar to sintering and in which very finely divided Pd is produced through heat decomposition of the PdCl.sub.2. The catalyst mat is preferably combined with a carbon mat impregnated with CuO which, for example, may be a carbon felt which has been made denser through roller compression.

Hydrophobic catalyst for recombiners

The aqueous, strongly alkaline electrolyte of the element and/or one or both of the electrodes contain(s) additive of soluble chloride, sulfate, or both.

Galvanic element with negative zinc electrode

Lead dust evolution from battery plates is reduced by applying a coating containing a silicate. Also plates so produced.

Dust reduction for electrode plates

A rechargeable mercury/mercury oxide electrode having a high capacity, especially for primary cells and accumulators, which has a metal matrix with a non-pyrophoric amalgam. The electrode is capable of repeated charging and discharging cycles during which the mercury is present as mercury oxide and mercury, respectively. The electrode is capable of a flat and constant discharge curve, with an electrical current discharge approaching the theoretical capacity of the electrode.

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Kelkheim, Germany

Margarete Jung