Sorapec S.a.

Laboratoires Sorapec Societe Anonyme

Noelle Tassin

Guy Bronoel

Denis Doniat

Bernard Bugnet

Thierry Potier

Robert Rouget

Serge Besse

Bipolar electrode for battery with alkaline electrolyte

Bipolar electrode is provided with a conductive support/separator perforated on a part which is free from active material with at least one opening which communicates by a gaseous environment in a battery between elements assembled in series. The opening prevents the passage of electrolyte from one conductive support/separator to another, and may include an advantageously hydrophobic material, which also contains an opening therethrough, and is arranged on at least one side of the opening. The bipolar electrodes are particularly applicable to sealed batteries.

Bipolar electrode for batteries

The cadmium negative electrode has a structure serving as a collector and made of nickel foam. The sponge is filled with a mixture cons mainly of cadmium oxide and contains nickel sulphate hexahydrate in the proportion of 1.8 to 2.7% by weight of the total mixture, expressed in the form of nickel.

Method of making cadmium electrodes for alkaline batteries

The cadmium negative electrode has a structure serving as a collector and made of nickel foam. The sponge is filled with a mixture consisting mainly of cadmium oxide and contains nickel sulphate in the proportion of 1.8 to 2.7% by weight of the total mixture, expressed in the form of nickel.

Cadmium electrodes for alkaline batteries

The positive nickel electrode is provided having a structure of cellular nickel foam filled with a paste based on nickel hydroxide. The paste contains (in dry matter and per 100 parts by weight nickel hydroxide) 7 to 8 parts by weight powder-form nickel metal, 5 to 12 parts by weight of a cobalt hydroxide and/or salt, the parts by weight being expressed as equivalents of cobalt metal.

Positive nickel electrode

Collector support for lead/lead oxide batteries is made of a screen of electrolyte-resistant polymer coated with a conductive underlayer and a layer of lead or a lead rich alloy having a mass per surface comprised between 30 and 40 g/dm.sup.2 relative to the projected surface area of the collector support. The dimensions of the screen are such that no point inside the screen pattern is located at a distance greater than 2.5 mm from any strand of the screen.

Growing community of inventors

Fontenay-sous-Bois, France

Noelle Tassin