S.c.p.s. Societe De Conseil Et De Prospective Scientifique, S.a.

Sunergy

Fabrice Fourgeot

Denis Doniat

Bernard Bugnet

Robert Rouget

Shadi Mirhashemi Haghighi

The invention relates to the field of alkaline electrochemical cells and more specifically to that of batteries.

Secondary alkaline electrochemical cells with zinc anode

Silver positive electrode for alkali secondary batteries having an enhanced cycling capability, and consequently a longer lifetime in cycling of the storage batteries incorporating it, by optimizing, in recharge mode, the conditions for electrochemically reducing the oxidized silver species. The silver electrode according to the invention is of the plasticized type, and a high-porosity collector, such as a woven fabric, a felt or a reticulated cellular metal foam, is used. The active compound introduced into the collector is prepared in paste form, in which the active material consists of metallic silver particles and/or silver monoxide particles, and may advantageously include a metal oxide acting as pore-forming and wetting agent for the electrode. Such an electrode is particularly intended for mounting in silver-zinc storage batteries operating in open mode or sealed mode.

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Fontenay-sous-Bois, France

Fabrice Fourgeot