Varta Batterie Aktiengesellschaft

Ernst Voss

Waldemar Borger

August Winsel

Heinrich Rabenstein

Margarete Jung

Tsvetko Chobanov

Welf Dennstedt

Udo Hullmeine

A one-piece galvanic solid element can be produced by directly polymerizing acetylene onto the surfaces of a disc-shaped ceramic solid electrolyte, using Ziegler-Natta catalysts. Starting from the polyacetylene layers so formed, negative electrode polarity is imparted to one layer and positive electrode polarity to the other layer, through immersion of the element in a suitable doping solution (e.g. NaPF.sub.6 in CH.sub.2 Cl.sub.2) and electrochemical polarization. As electrolyte material there can be used .beta.-Al.sub.2 O.sub.3, and mixed crystal compounds such as Na.sub.3 Zr.sub.2 Si.sub.2 PO.sub.12, which are Na-ion conductive, or Li-ion conductive Li.sub.3 N. Replacement of the negative polyacetylene electrode with Li or Na is possible.

Polyacetylene cell with ceramic solid electrolyte

The active mass is supported by an antimony free or antimony poor grid having embedded therein antimony-containing storage bodies from which the antimony is released in controlled manner during the life span of the electrode.

Positive electrode for storage battery

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

Dust reduction for electrode plates

The weight of the negative active mass is below 80% of the positive active mass. Preferably there is one more positive than negative plates.

Maintenance free lead storage battery

In a galvanic cell, there is provided a solid fluoride ion-conductive electrolyte which is a compound having the formula M.sub.n Pb.sub.1.sub.-n F.sub.2.sub.-n wherein M is at least one element selected from the group consisting of potassium and rubidium; Pb is usually all lead but part of the lead may be replaced by metal more electropositive than lead; F is fluorine; and n is a positive value.

Growing community of inventors

Liederbach, Germany

Ernst Voss